Reclast contains zoledronic acid, a bisphosphonic acid which is an inhibitor of osteoclastic bone resorption. Zoledronic acid is designated chemically as (1-Hydroxy-2imidazol-1-yl-phosphonoethyl) phosphonic acid monohydrate and its structural formula is:

Zoledronic acid monohydrate is a white crystalline powder. Its molecular formula is C₅H₁₀N₂O₇P₂•H₂O and a molar mass of 290.1 g/Mol. Zoledronic acid monohydrate is highly soluble in 0.1N sodium hydroxide solution, sparingly soluble in water and 0.1N hydrochloric acid, and practically insoluble in organic solvents. The pH of the Reclast solution for infusion is approximately 6.0 – 7.0.

Reclast Injection is available as a sterile solution in bottles for intravenous infusion. One bottle with 100 mL solution contains 5.330 mg of zoledronic acid monohydrate, equivalent to 5 mg zoledronic acid on an anhydrous basis.

Inactive Ingredients: 4950 mg of mannitol, USP; and 30 mg of sodium citrate, USP.

Last updated on RxList: 6/26/2009

Treatment of Osteoporosis in Postmenopausal Women

Reclast is indicated for treatment of osteoporosis in postmenopausal women. In postmenopausal women with osteoporosis, diagnosed by bone mineral density (BMD) or prevalent vertebral fracture, Reclast reduces the incidence of fractures (hip, vertebral and non-vertebral osteoporosis-related fractures). In patients at high risk of fracture, defined as a recent low-trauma hip fracture, Reclast reduces the incidence of new clinical fractures [see Clinical Studies].

Prevention of Osteoporosis in Postmenopausal Women

Reclast is indicated for prevention of osteoporosis in postmenopausal women [see Clinical Studies].

Osteoporosis in Men

Reclast is indicated for treatment to increase bone mass in men with osteoporosis [see Clinical Studies].

Glucocorticoid-Induced Osteoporosis

Reclast is indicated for the treatment and prevention of glucocorticoid-induced osteoporosis in men and women who are either initiating or continuing systemic glucocorticoids in a daily dosage equivalent to 7.5 mg or greater of prednisone and who are expected to remain on glucocorticoids for at least 12 months. [See Clinical Studies].

Paget's Disease of Bone

Reclast is indicated for treatment of Paget's disease of bone in men and women. Treatment is indicated in patients with Paget's disease of bone with elevations in serum alkaline phosphatase of two times or higher than the upper limit of the age-specific normal reference range, or those who are symptomatic, or those at risk for complications from their disease [see Clinical Studies].

Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.

Patients must be appropriately hydrated prior to administration of Reclast [see WARNINGS AND PRECAUTIONS].

Administration of acetaminophen following Reclast administration may reduce the incidence of acute-phase reaction symptoms.

A 5 mg dose of Reclast administered intravenously is recommended for patients with creatinine clearance ≥ 35 mL/min [see WARNINGS AND PRECAUTIONS].

Treatment of Osteoporosis in Postmenopausal Women

The recommended regimen is a 5 mg infusion once a year given intravenously over no less than 15 minutes. For osteoporosis treatment, and to reduce the risk of hypocalcemia, patients must be adequately supplemented with calcium and vitamin D if dietary intake is not sufficient. Postmenopausal women require an average of at least 1200 mg calcium and 800-1000 IU vitamin D daily.

Prevention of Osteoporosis in Postmenopausal Women

The recommended regimen is a 5 mg infusion given once every 2 years intravenously over no less than 15 minutes. Patients must be adequately supplemented with calcium and vitamin D if dietary intake is not sufficient. Postmenopausal women require an average of 1200 mg calcium and 800-1000 IU vitamin D daily.

Osteoporosis in Men

The recommended regimen is a 5 mg infusion once a year given intravenously over no less than 15 minutes. Patients must be adequately supplemented with calcium and vitamin D if dietary intake is not sufficient. An average of at least 1200 mg calcium and 800-1000 IU vitamin D daily is recommended.

Treatment and Prevention of Glucocorticoid-Induced Osteoporosis

The recommended regimen is a 5mg infusion once a year given intravenously over no less than 15 minutes. Patients must be adequately supplemented with calcium and vitamin D if dietary intake is not sufficient. An average of at least 1200 mg calcium and 800-1000 IU vitamin D daily is recommended.

Treatment of Paget's Disease of Bone

The recommended dose is a 5 mg infusion. The infusion time must not be less than 15 minutes given over a constant infusion rate.

To reduce the risk of hypocalcemia, all patients with Paget's disease should receive 1500 mg elemental calcium daily in divided doses (750 mg two times a day, or 500 mg three times a day) and 800 IU vitamin D daily, particularly in the 2 weeks following Reclast administration. All patients should be instructed on the importance of calcium and vitamin D supplementation in maintaining serum calcium levels, and on the symptoms of hypocalcemia [see WARNINGS AND PRECAUTIONS].

Re-treatment of Paget's Disease

After a single treatment with Reclast in Paget's disease an extended remission period is observed. Specific re-treatment data are not available. However, re-treatment with Reclast may be considered in patients who have relapsed, based on increases in serum alkaline phosphatase, or in those patients who failed to achieve normalization of their serum alkaline phosphatase, or in those patients with symptoms, as dictated by medical practice.

Method of Administration

The Reclast infusion time must not be less than 15 minutes given over a constant infusion rate.

Reclast solution for infusion must not be allowed to come in contact with any calcium or other divalent cation-containing solutions, and should be administered as a single intravenous solution through a separate vented infusion line.

If refrigerated, allow the refrigerated solution to reach room temperature before administration. After opening, the solution is stable for 24 hours at 2°C–8°C (36°F 46°F) [see HOW SUPPLIED/Storage and Handling].

Dosage Forms And Strengths

5 mg in a 100 mL ready to infuse solution.

Each bottle contains 5 mg/100 mL. NDC 0078-0435-61

Handling

After opening the solution, it is stable for 24 hours at 2°C–8°C (36°F-46°F).

If refrigerated, allow the refrigerated solution to reach room temperature before administration.

Storage

Store at 25°C (77°F); excursions permitted to 15°C-30°C (59°F-86°F) [see USP Controlled Room Temperature].

MAY 2009. Manufactured by: Novartis Pharma Stein AG, Stein, Switzerland. Distributed by: Novartis Pharmaceuticals Corporation, East Hanover , New Jersey 07936.

Last updated on RxList: 6/26/2009

Clinical Studies Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

Treatment of Osteoporosis in Postmenopausal Women

The safety of Reclast in the treatment of postmenopausal osteoporosis was assessed in Study 1, a large, randomized, double-blind, placebo-controlled, multinational study of 7736 postmenopausal women aged 65-89 years with osteoporosis, diagnosed by bone mineral density or the presence of a prevalent vertebral fracture. The duration of the trial was three years with 3862 patients exposed to Reclast and 3852 patients exposed to placebo administered once annually as a single 5 mg dose in 100 mL solution infused over at least 15 minutes, for a total of three doses. All women received 1000 to 1500 mg of elemental calcium plus 400 to 1200 IU of vitamin D supplementation per day.

The incidence of all-cause mortality was similar between groups: 3.4% in the Reclast group and 2.9% in the placebo group. The incidence of serious adverse events was 29.2% in the Reclast group and 30.1% in the placebo group. The percentage of patients who withdrew from the study due to adverse events was 5.4% and 4.8% for the Reclast and placebo groups, respectively.

The safety of Reclast in the treatment of osteoporosis patients with a recent (within 90 days) low-trauma hip fracture was assessed in Study 2, a randomized, double-blind, placebo-controlled, multinational endpoint-driven study of 2127 men and women aged 50-95 years 1065 patients were randomized to Reclast and 1062 patients were randomized to placebo. Reclast was administered once annually as a single 5 mg dose in 100 mL solution infused over at least 15 minutes. The study continued until at least 211 patients had a confirmed clinical fracture in the study population who were followed for an average of approximately 2 years on study drug. Vitamin D levels were not routinely measured but a loading dose of vitamin D (50,000 to 125,000 IU orally or IM) was given to patients and they were started on 1000 to 1500 mg of elemental calcium plus 800 to 1200 IU of vitamin D supplementation per day for at least 14 days prior to the study drug infusions.

The incidence of all-cause mortality was 9.6% in the Reclast group and 13.3% in the placebo group. The incidence of serious adverse events was 38.3% in the Reclast group and 41.3% in the placebo group. The percentage of patients who withdrew from the study due to adverse events was 5.3% and 4.7% for the Reclast and placebo groups, respectively.

Adverse reactions reported in at least 2% of patients with osteoporosis and more frequently in the Reclast-treated patients than placebo-treated patients in either osteoporosis trial are shown below in Table 1.

Table 1 : Adverse Reactions Occurring in ≥ 2.0% of Patients with Osteoporosis and More Frequently than in Placebo-Treated Patients

System Organ Class	Study 1		Study 2
	5 mg IV Reclast once per year % (N=3862)	Placebo once per year % (N=3852)	5 mg IV Reclast once per year % (N=1054)	Placebo once per year % (N=1057)
Blood and the Lymphatic System Disorders
Anemia	4.4	3.6	5.3	5.2
Metabolism and Nutrition Disorders
Dehydration	0.6	0.6	2.5	2.3
Anorexia	2.0	1.1	1.0	1.0
Nervous System Disorders
Headache	12.4	8.1	3.9	2.5
Dizziness	7.6	6.7	2.0	4.0
Ear and Labyrinth Disorders
Vertigo	4.3	4.0	1.3	1.7
Cardiac Disorders
Atrial Fibrillation	2.4	1.9	2.8	2.6
Vascular Disorders
Hypertension	12.7	12.4	6.8	5.4
Gastrointestinal Disorders
Nausea	8.5	5.2	4.5	4.5
Diarrhea	6.0	5.6	5.2	4.7
Vomiting	4.6	3.2	3.4	3.4
Abdominal Pain Upper	4.6	3.1	0.9	1.5
Dyspepsia	4.3	4.0	1.7	1.6
Musculoskeletal, Connective Tissue and Bone Disorders
Arthralgia	23.8	20.4	17.9	18.3
Myalgia	11.7	3.7	4.9	2.7
Pain in Extremity	11.3	9.9	5.9	4.8
Shoulder Pain	6.9	5.6	0.0	0.0
Bone Pain	5.8	2.3	3.2	1.0
Neck Pain	4.4	3.8	1.4	1.1
Muscle Spasms	3.7	3.4	1.5	1.7
Osteoarthritis	9.1	9.7	5.7	4.5
Musculoskeletal Pain	0.4	0.3	3.1	1.2
General Disorders and Administrative Site Conditions
Pyrexia	17.9	4.6	8.7	3.1
Influenza-like Illness	8.8	2.7	0.8	0.4
Fatigue	5.4	3.5	2.1	1.2
Chills	5.4	1.0	1.5	0.5
Asthenia	5.3	2.9	3.2	3.0
Peripheral Edema	4.6	4.2	5.5	5.3
Pain	3.3	1.3	1.5	0.5
Malaise	2.0	1.0	1.1	0.5
Hyperthermia	0.3	< 0.1	2.3	0.3
Chest Pain	1.3	1.1	2.4	1.8
Investigations
Creatinine Renal Clearance Decreased	2.0	2.4	2.1	1.7

Renal Impairment

Treatment with intravenous bisphosphonates, including zoledronic acid, has been associated with renal impairment manifested as deterioration in renal function (i.e., increased serum creatinine) and in rare cases, acute renal failure. In the clinical trial for postmenopausal osteoporosis, patients with baseline creatinine clearance < 30 mL/min, urine dipstick ≥ 2+ protein or increase in serum creatinine of > 0.5 mg/dL during the screening visits were excluded. The change in creatinine clearance (measured annually prior to dosing) and the incidence of renal failure and impairment was comparable for both the Reclast and placebo treatment groups over 3 years, including patients with mild to moderate renal impairment (creatinine clearance between 30-60 mL/min) at baseline. Overall, there was a transient increase in serum creatinine observed within 10 days of dosing in 1.8% of Reclast-treated patients versus 0.8% of placebo-treated patients which resolved without specific therapy [see WARNINGS AND PRECAUTIONS].

Acute Phase Reaction

The signs and symptoms of acute phase reaction occurred in Study 1 following Reclast infusion including, fever (18%), myalgia (9%), and flu-like symptoms (8%), headache (7%), and arthralgia (7%). The majority of these symptoms occurred within the first 3 days following the dose of Reclast and usually resolved within 3 days of onset but resolution could take up to 7-14 days. In Study 2, patients without a contraindication to acetaminophen were provided with a standard oral dose at the time of the IV infusion and instructed to use additional acetaminophen at home for the next 72 hours as needed. Reclast was associated with fewer signs and symptoms of a transient acute phase reaction in this trial: fever (7%) and arthralgia (3%). The incidence of these symptoms decreased with subsequent doses of Reclast.

Laboratory Findings

In Study 1, in women with postmenopausal osteoporosis, approximately 0.2% of patients had notable declines of serum calcium levels (less than 7.5 mg/dL) following Reclast administration. No symptomatic cases of hypocalcemia were observed. In Study 2, following pre-treatment with vitamin D, no patients had treatment emergent serum calcium levels below 7.5 mg/dL.

Injection Site Reactions

In the osteoporosis trials, local reactions at the infusion site such as itching, redness and/or pain have been reported in 0 to 0.7% of patients following the administration of Reclast and 0 to 0.5% of patients following administration of placebo.

Osteonecrosis of the Jaw

In the postmenopausal osteoporosis trial, Study 1, in 7736 patients, after initiation of therapy, symptoms consistent with ONJ occurred in one patient treated with placebo and one patient treated with Reclast. Both cases resolved after appropriate treatment [see WARNINGS AND PRECAUTIONS]. No reports of osteonecrosis of the jaw were reported in either treatment group in Study 2.

Atrial Fibrillation

In the postmenopausal osteoporosis trial, Study 1, adjudicated serious adverse events of atrial fibrillation in the zoledronic acid treatment group occurred in 1.3% of patients (50 out of 3862) compared to 0.4% (17 out of 3852) in the placebo group. The overall incidence of all atrial fibrillation adverse events in the zoledronic acid treatment group was reported in 2.5% of patients (96 out of 3862) in the Reclast group vs. 1.9% of patients (75 out of 3852) in the placebo group. Over 90% of these events in both treatment groups occurred more than a month after the infusion. In an ECG sub-study, ECG measurements were performed on a subset of 559 patients before and 9 to 11 days after treatment. There was no difference in the incidence of atrial fibrillation between treatment groups suggesting these events were not related to the acute infusions. In Study 2, adjudicated serious adverse events of atrial fibrillation in the zoledronic acid treatment group occurred in 1.0% of patients (11 out of 1054) compared to 1.2% (13 out of 1057) in the placebo group demonstrating no difference between treatment groups.

Ocular Adverse Events

Cases of iritis/uveitis/episcleritis/conjunctivitis have been reported in patients treated with bisphosphonates, including zoledronic acid. In the osteoporosis trials, 1 ( < 0.1%) to 9 (0.2%) patients treated with Reclast and 0 (0%) to 1 ( < 0.1%) patient treated with placebo developed iritis/uveitis/episcleritis.

Prevention of Osteoporosis in Postmenopausal Women

The safety of Reclast in postmenopausal women with osteopenia (low bone mass) was assessed in a 2-year randomized, multi-center, double-blind, placebo-controlled study of 581 postmenopausal women aged ≥ 45 years. Patients were randomized to one of three treatment groups: (1) Reclast given at randomization and Month 12 (n= 198); (2) Reclast given at randomization and placebo at Month 12 (n=181); and (3) placebo given at randomization and Month 12 (n=202). Reclast was administered as a single 5 mg dose in 100 mL solution infused over at least 15 minutes. All women received 500 to 1200 mg elemental calcium plus 400 to 800 IU vitamin D supplementation per day.

The incidence of serious adverse events was similar for subjects given (1) Reclast at randomization and at Month 12 (10.6%), (2) Reclast at randomization and placebo given at Month 12 (9.4%), and (3) placebo at randomization and at Month 12 (11.4%). The percentages of patients who withdrew from the study due to adverse events were 7.1%, 7.2%, and 3.0% in the two Reclast groups and placebo group, respectively. Adverse reactions reported in at least 2% of patients with osteopenia and more frequently in the Reclast-treated patients than placebo-treated patients are shown in Table 2.

Table 2 : Adverse Reactions Occurring in ≥ 2% of Patients with Osteopenia and More Frequently than in Placebo-Treated Patients

System Organ Class	5 mg IV Reclast Once Per Year % (N=198)	5 mg IV Reclast Once % (N=181)	Placebo once per year % (N=202)
Metabolism and nutrition disorders
Anorexia	2.0	0.6	0.0
Nervous system disorders
Headache	14.6	20.4	11.4
Dizziness	7.6	6.1	3.5
Hypoesthesia	5.6	2.2	2.0
Ear and labyrinth disorders
Vertigo	2.0	1.7	1.0
Vascular disorders
Hypertension	5.1	8.3	6.9
Gastrointestinal disorders
Nausea	17.7	11.6	7.9
Diarrhea	8.1	6.6	7.9
Vomiting	7.6	5.0	4.5
Dyspepsia	7.1	6.6	5.0
Abdominal pain*	8.6	6.6	7.9
Constipation	6.6	7.2	6.9
Abdominal discomfort	2.0	1.1	0.5
Abdominal distension	2.0	0.6	0.0
Skin and subcutaneous tissue disorders
Rash	3.0	2.2	2.5
Musculoskeletal and connective tissue disorders
Arthralgia	27.3	18.8	19.3
Myalgia	19.2	22.7	6.9
Back pain	18.2	16.6	11.9
Pain in extremity	11.1	16.0	9.9
Muscle spasms	5.6	2.8	5.0
Musculoskeletal pain**	8.1	7.2	7.9
Bone pain	5.1	3.3	1.0
Neck pain	5.1	6.6	5.0
Arthritis	4.0	2.2	1.5
Joint stiffness	3.5	1.1	2.0
Joint swelling	3.0	0.6	0.0
Flank pain	2.0	0.6	0.0
Pain in jaw	2.0	3.9	2.5
General disorders and administration site conditions
Pain	24.2	14.9	3.5
Pyrexia	21.7	21.0	4.5
Chills	18.2	18.2	3.0
Fatigue	14.6	9.9	4.0
Asthenia	6.1	2.8	1.0
Peripheral edema	5.6	3.9	3.5
Non-cardiac chest pain	3.5	7.7	3.0
Influenza like illness	1.5	3.3	2.0
Malaise	1.0	2.2	0.5
* Combined abdominal pain, abdominal pain upper, and abdominal pain lower as one ADR ** Combined musculoskeletal pain and musculoskeletal chest pain as one ADR

Ocular Adverse Events

Cases of iritis/uveitis/episcleritis/conjunctivitis have been reported in patients treated with bisphosphonates, including zoledronic acid. In the osteoporosis prevention trial, 4 (1.1%) patients treated with Reclast and 0 (0%) patients treated with placebo developed iritis/uveitis.

Acut e Phase Reaction

In patients given Reclast at randomization and placebo at Month 12, Reclast was associated with signs and symptoms of an acute phase reaction: Myalgia (20.4%), fever (19.3%), chills (18.2%), pain (13.8%), headache (13.3%), fatigue (8.3%), arthralgia (6.1%), pain in extremity (3.9%), influenza-like illness (3.3%), and back pain (1.7%), which occurred within the first 3 days following the dose of Reclast. The majority of these symptoms were mild to moderate and resolved within 3 days of the event onset but resolution could take up to 7-14 days.

Osteoporosis in Men

The safety of Reclast in men with osteoporosis or osteoporosis secondary to hypogonadism, was assessed in a two year randomized, multicenter, double-blind, active controlled group study of 302 men aged 25-86 years. One hundred fifty three (153) patients were exposed to Reclast administered once annually with a 5 mg dose in 100 mL infused over 15 minutes for up to a total of two doses, and 148 patients were exposed to a commercially-available oral weekly bisphosphonate (active control) for up to two years. All participants received 1000 mg of elemental calcium plus 800 to 1000 IU of vitamin D supplementation per day.

The incidence of all-cause mortality (one in each group) and serious adverse events were similar between the Reclast and active control treatment groups. The percentage of patients experiencing at least one adverse event was comparable between the Reclast and active control groups, with the exception of a higher incidence of post-dose symptoms in the Reclast group that occurred within 3 days after infusion. The overall safety and tolerability of Reclast was similar to the active control.

Adverse reactions reported in at least 2% of men with osteoporosis and more frequently in the Reclast-treated patients than the active control-treated patients and either (1) not reported in the postmenopausal osteoporosis treatment trial or (2) reported more frequently in the trial of osteoporosis in men are presented in Table 3. Therefore, Table 3 should be viewed in conjunction with Table 1.

Table 3: Adverse Reactions Occurring in ≥ 2% of Men with Osteoporosis and More Frequently in the Reclast-Treated Patients than the Active Control Treated Patients and either (1) Not Reported in the Postmenopausal Osteoporosis Treatment Trial or (2) Reported More Frequently in this Trial

System Organ Class	5 mg IV Reclast once per year %(N=153)	Active Control once weekly % N=148)
Nervous System Disorders
Headache	15.0	6.1
Lethargy	3.3	1.4
Eye Disorders
Eye pain	2.0	0.0
Cardiac Disorders
Atrial fibrillation	3.3	2.0
Palpitations	2.6	0.0
Respiratory, Thoracic and Mediastinal Disorders
Dyspnea	6.5	4.7
Abdominal pain*	7.9	4.1
Skin and Subcutaneous Tissue Disorders
Hyperhidrosis	2.6	2.0
Musculoskeletal, Connective Tissue and Bone Disorders
Myalgia	19.6	6.8
Musculoskeletal pain**	12.4	10.8
Musculoskeletal stiffness	4.6	0.0
Renal and Urinary Disorders
Blood creatinine increased	2.0	0.7
General Disorders and Administrative Site Conditions
Fatigue	17.6	6.1
Pain	11.8	4.1
Chills	9.8	2.7
Influenza like illness	9.2	2.0
Malaise	7.2	0.7
Acute phase reaction	3.9	0.0
Investigations
C-reactive protein increased	4.6	1.4
* Combined abdominal pain, abdominal pain upper, and abdominal pain lower as one ADR ** Combined musculoskeletal pain and musculoskeletal chest pain as one ADR

Renal Impairment

Creatinine clearance was measured annually prior to dosing and changes in long-term renal function over 24 months was comparable in the Reclast and active control groups. [See WARNINGS AND PRECAUTIONS].

Acute Phase Reaction

Reclast was associated with signs and symptoms of an acute phase reaction: Myalgia (17.1%), fever (15.7%), fatigue (12.4%), arthralgia (11.1%), pain (10.5%), chills (9.8%), headache (9.8%), influenza-like illness (8.5%), malaise (5.2%), and back pain (3.3%), which occurred within the first 3 days following the dose of Reclast. The majority of these symptoms were mild to moderate and resolved within 3 days of the event onset but resolution could take up to 7-14 days. The incidence of these symptoms decreased with subsequent doses of Reclast.

Atrial Fibrillation

The incidence of all atrial fibrillation adverse events in the Reclast treatment group was 3.3% (5 out of 153) compared to 2.0% (3 out of 148) in the active control group. However, there were no patients with adjudicated serious adverse events of atrial fibrillation in the Reclast treatment group.

Laboratory Findings

There were no patients who had treatment emergent serum calcium levels below 7.5 mg/dL.

Injection Site Reactions

There were 4 patients (2.6%) on Reclast vs. 2 patients (1.4%) on active control with local site reactions.

Osteonecrosis of the Jaw

In this trial there were no cases of osteonecrosis of the jaw. [See WARNINGS AND PRECAUTIONS].

Glucocorticoid-Induced Osteoporosis

The safety of Reclast in men and women in the treatment and prevention of glucocorticoid-induced osteoporosis was assessed in a randomized, multicenter, double-blind, active controlled, stratified study of 833 men and women aged 18-85 years treated with ≥ 7.5 mg/day oral prednisone (or equivalent). Patients were stratified according to the duration of their pre-study corticosteroid therapy: ≤ 3 months prior to randomization (prevention subpopulation), and > 3 months prior to randomization (treatment subpopulation).

The duration of the trial was one year with 416 patients exposed to Reclast administered once as a single 5 mg dose in 100 mL infused over 15 minutes, and 417 patients exposed to a commercially-available oral daily bisphosphonate (active control) for one year. All participants received 1000 mg of elemental calcium plus 400 to 1000 IU of vitamin D supplementation per day.

The incidence of all–cause mortality was similar between treatment groups: 0.9% in the Reclast group and 0.7% in the active control group. The incidence of serious adverse events was similar between the Reclast treatment and prevention groups, 18.4% and 18.1%, respectively, and the active control treatment and prevention groups, 19.8% and 16.0%, respectively. The percentage of subjects who withdrew from the study due to adverse events was 2.2% in the Reclast group vs. 1.4% in the active control group. The overall safety and tolerability were similar between Reclast and active control groups with the exception of a higher incidence of post-dose symptoms in the Reclast group that occurred within 3 days after infusion. The overall safety and tolerability profile of Reclast in glucocorticoid-induced osteoporosis was similar to the adverse events reported in the Reclast postmenopausal osteoporosis clinical trial.

Adverse reactions reported in at least 2% of patients that were either not reported in the postmenopausal osteoporosis treatment trial or reported more frequently in the treatment and prevention of glucocorticoid-induced osteoporosis trial included the following: abdominal pain (Reclast 7.5%; active control 5.0%), and musculoskeletal pain (Reclast 3.1%; active control 1.7%). Other musculoskeletal events included back pain (Reclast 4.3%, active control 6.2%), bone pain (Reclast 3.1%, active control 2.2%), and pain in the extremity (Reclast 3.1%, active control 1.2%). In addition, the following adverse events occurred more frequently than in the postmenopausal osteoporosis trial: nausea (Reclast 9.6%; active control 8.4%), and dyspepsia (Reclast 5.5%; active control 4.3%).

Renal Impairment

Renal function measured prior to dosing and at the end of the 12 month study was comparable in the Reclast and active control groups. [See WARNINGS AND PRECAUTIONS].

Acute Phase Reaction

Reclast was associated with signs and symptoms of a transient acute phase reaction that was similar to that seen in the Reclast postmenopausal osteoporosis clinical trial.

Atrial Fibrillation

The incidence of atrial fibrillation adverse events was 0.7% (3 of 416) in the Reclast group compared to no adverse events in the active control group. All subjects had a prior history of atrial fibrillation and no cases were adjudicated as serious adverse events. One patient had atrial flutter in the active control group.

Laboratory Findings

There were no patients who had treatment emergent serum calcium levels below 7.5 mg/dL.

Injection Site Reactions

There were no local reactions at the infusion site.

Osteonecrosis of the Jaw

In this trial there were no cases of osteonecrosis of the jaw. [See WARNINGS AND PRECAUTIONS].

Paget's Disease of Bone

In the Paget's disease trials, two 6-month, double-blind, comparative, multinational studies of 349 men and women aged > 30 years with moderate to severe disease and with confirmed Paget's disease of bone, 177 patients were exposed to Reclast and 172 patients exposed to risedronate. Reclast was administered once as a single 5 mg dose in 100 mL solution infused over at least 15 minutes. Risedronate was given as an oral daily dose of 30 mg for 2 months.

The incidence of serious adverse events was 5.1% in the Reclast group and 6.4% in the risedronate group. The percentage of patients who withdrew from the study due to adverse events was 1.7% and 1.2% for the Reclast and risedronate groups, respectively.

Adverse reactions occurring in at least 2% of the Paget's patients receiving Reclast (single 5 mg IV infusion) or risedronate (30 mg oral daily dose for 2 months) over a 6-month study period are listed by system organ class in Table 4.

Table 4 : Adverse Reactions Reported in at Least 2% of Paget's Patients Receiving Reclast (Single 5 mg IV Infusion) or Risedronate (Oral 30 mg Daily for 2 Months) Over a 6-Month Follow-Up Period

System Organ Class	5 mg IV Reclast % (N = 177)	30 mg/day x 2 Months risedronate %(N = 172)
Infections and Infestations
Influenza	7	5
Metabolism and Nutrition Disorders
Hypocalcemia	3	1
Anorexia	2	2
Nervous System Disorders
Headache	11	10
Dizziness	9	4
Lethargy	5	1
Paresthesia	2	0
Respiratory, Thoracic and Mediastinal Disorders
Dyspnea	5	1
Gastrointestinal Disorders
Nausea	9	6
Diarrhea	6	6
Constipation	6	5
Dyspepsia	5	4
Abdominal Distension	2	1
Abdominal Pain	2	2
Vomiting	2	2
Abdominal Pain Upper	1	2
Skin and Subcutaneous Tissue Disorders
Rash	3	2
Musculoskeletal, Connective Tissue and Bone Disorders
Arthralgia	9	11
Bone Pain	9	5
Myalgia	7	4
Back Pain	4	7
Musculoskeletal Stiffness	2	1
General Disorders and Administrative Site Conditions
Influenza-like Illness	11	6
Pyrexia	9	2
Fatigue	8	4
Rigors	8	1
Pain	5	4
Peripheral Edema	3	1
Asthenia	2	1

Laboratory Findings

In the Paget's disease trials, early, transient decreases in serum calcium and phosphate levels were observed. Approximately 21% of patients had serum calcium levels < 8.4 mg/dL 9-11 days following Reclast administration.

Renal Impairment

In clinical trials in Paget's disease there were no cases of renal deterioration following a single 5 mg 15-minute infusion [see WARNINGS AND PRECAUTIONS].

Acute Phase Reaction

The signs and symptoms of acute phase reaction (influenza-like illness, pyrexia, myalgia, arthralgia, and bone pain) were reported in 25% of patients in the Reclasttreated group compared to 8% in the risedronate-treated group. Symptoms usually occur within the first 3 days following Reclast administration. The majority of these symptoms resolved within 4 days of onset.

Osteonecrosis of the Jaw

Osteonecrosis of the jaw has been reported with zoledronic acid [see WARNINGS AND PRECAUTIONS].

Post-Marketing Experience

Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

The following adverse reactions have been identified during post approval use of Reclast:

Acute Phase Reactions

Fever, headache, flu-like symptoms, nausea, vomiting, diarrhea, arthralgia, and myalgia. Symptoms may be significant and lead to dehydration.

Acute Renal Impairment

Transient rise in serum creatinine correctable with intravenous fluids; acute renal failure requiring hospitalization and/or dialysis. Increased serum creatinine was reported in patients with underlying renal disease and dehydration secondary to fever, gastrointestinal losses, diuretic therapy, etc., in the post-infusion period.

Allergic Reactions

There have been rare reports of allergic reaction with intravenous zoledronic acid including urticaria, angioedema, and bronchoconstriction. Rare cases of anaphylactic reaction/shock have also been reported.

Other

Hypocalcemia

No in vivo drug interaction studies have been performed for Reclast. In vitro and ex vivo studies showed low affinity of zoledronic acid for the cellular components of human blood. In vitro mean zoledronic acid protein binding in human plasma ranged from 28% at 200 ng/mL to 53% at 50 ng/mL. In vivo studies showed that zoledronic acid is not metabolized, and is excreted into the urine as the intact drug.

Aminoglycosides

Caution is advised when bisphosphonates, including zoledronic acid, are administered with aminoglycosides, since these agents may have an additive effect to lower serum calcium level for prolonged periods. This effect has not been reported in zoledronic acid clinical trials.

Loop Diuretics

Caution should also be exercised when Reclast is used in combination with loop diuretics due to an increased risk of hypocalcemia.

Nephrotoxic Drugs

Caution is indicated when Reclast is used with other potentially nephrotoxic drugs such as nonsteroidal anti-inflammatory drugs.

Drugs Primarily Excreted by the Kidney

Renal impairment has been observed following the administration of zoledronic acid in patients with pre-existing renal compromise or other risk factors [see WARNINGS AND PRECAUTIONS]. In patients with renal impairment, the exposure to concomitant medications that are primarily renally excreted (e.g., digoxin) may increase. Consider monitoring serum creatinine in patients at risk for renal impairment who are taking concomitant medications that are primarily excreted by the kidney.

Last updated on RxList: 6/26/2009

Included as part of the PRECAUTIONS section.

Drug Products with Same Active Ingredient

Reclast contains the same active ingredient found in Zometa, used for oncology indications, and a patient being treated with Zometa should not be treated with Reclast.

Hypocalcemia and Mineral Metabolism

Pre-existing hypocalcemia and disturbances of mineral metabolism (e.g., hypoparathyroidism, thyroid surgery, parathyroid surgery; malabsorption syndromes, excision of small intestine) must be effectively treated before initiating therapy with Reclast. Clinical monitoring of calcium and mineral levels (phosphorus and magnesium) is highly recommended for these patients [see CONTRAINDICATIONS ].

Hypocalcemia following Reclast administration is a significant risk in Paget's disease. All patients should be instructed about the symptoms of hypocalcemia and the importance of calcium and vitamin D supplementation in maintaining serum calcium levels [see DOSAGE AND ADMINISTRATION, ADVERSE REACTIONS, INFORMATION FOR PATIENTS].

All osteoporosis patients should be instructed on the importance of calcium and vitamin D supplementation in maintaining serum calcium levels [see DOSAGE AND ADMINISTRATION, ADVERSE REACTIONS, INFORMATION FOR PATIENTS].

Renal Impairment

A single dose of Reclast should not exceed 5 mg and the duration of infusion should be no less than 15 minutes [see DOSAGE AND ADMINISTRATION].

Reclast should not be used in patients with severe renal impairment (creatinine clearance < 35 mL/min) due to lack of adequate clinical experience in this population [see ADVERSE REACTIONS].

Renal impairment has been observed following the administration of zoledronic acid, especially in patients with pre-existing renal compromise or other risk factors including concomitant nephrotoxic medications, concomitant diuretic therapy, or severe dehydration occurring before or after Reclast administration. Renal impairment has been observed in patients after a single administration. Rare reports of hospitalization and/or dialysis occurred in patients with underlying moderate to severe renal impairment [see Post-Marketing Experience]. Renal impairment may lead to increased exposure of concomitant medications that are primarily renally excreted [see DRUG INTERACTIONS ].

Serum creatinine should be measured before each Reclast dose. Transient increase in serum creatinine may be greater in patients with impaired renal function; consider interim monitoring of serum creatinine in at-risk patients. Patients, especially those receiving diuretic therapy, should be appropriately hydrated prior to administration of Reclast. Reclast should be used with caution with other nephrotoxic drugs [see DRUG INTERACTIONS]. Consider monitoring serum creatinine in patients at risk for renal impairment who are taking concomitant medications that are primarily excreted by the kidney [see DRUG INTERACTIONS].

Osteonecrosis of the Jaw

Osteonecrosis of the jaw (ONJ) has been reported in patients treated with bisphosphonates, including zoledronic acid. Most cases have been in cancer patients treated with intravenous bisphosphonates undergoing dental procedures. Some cases have occurred in patients with postmenopausal osteoporosis treated with either oral or intravenous bisphosphonates. A routine oral examination should be performed by the prescriber prior to initiation of bisphosphonate treatment. A dental examination with appropriate preventive dentistry should be considered prior to treatment with bisphosphonates in patients with a history of concomitant risk factors (e.g., cancer, chemotherapy, radiotherapy, corticosteroids, poor oral hygiene, pre-existing dental disease or infection, anemia, coagulopathy).

While on treatment, patients with concomitant risk factors should avoid invasive dental procedures if possible. For patients who develop ONJ while on bisphosphonate therapy, dental surgery may exacerbate the condition. For patients requiring dental procedures, there are no data available to suggest whether discontinuation of bisphosphonate treatment reduces the risk of ONJ. The clinical judgment of the treating physician should guide the management plan of each patient based on individual benefit/risk assessment [see ADVERSE REACTIONS].

Pregnancy

RECLAST SHOULD NOT BE USED DURING PREGNANCY. Reclast may cause fetal harm when administered to a pregnant woman. If the patient becomes pregnant while taking this drug, the patient should be apprised of the potential harm to the fetus. Women of childbearing potential should be advised to avoid becoming pregnant while on Reclast therapy [see Use in Specific Populations].

Musculoskeletal Pain

In post-marketing experience, severe and occasionally incapacitating bone, joint, and/or muscle pain have been infrequently reported in patients taking bisphosphonates, including Reclast. The time to onset of symptoms varied from one day to several months after starting the drug. Consider withholding future Reclast treatment if severe symptoms develop. Most patients had relief of symptoms after stopping. A subset had recurrence of symptoms when rechallenged with the same drug or another bisphosphonate [see ADVERSE REACTIONS].

Patients with Asthma

While not observed in clinical trials with Reclast, there have been reports of bronchoconstriction in aspirin-sensitive patients receiving bisphosphonates. Use Reclast with caution in aspirin-sensitive patients.

Patient Counseling Information

See FDA-Approved Patient Labeling.

Patients should be made aware that Reclast contains the same active ingredient (zoledronic acid) found in Zometa®, and that patients being treated with Zometa should not be treated with Reclast.

Before being given Reclast patients should tell their doctor if they have kidney problems and what medications they are taking.

Reclast should not be given if the patient is pregnant or plans to become pregnant, or if she is breast-feeding [see WARNINGS AND PRECAUTIONS]. There have been reports of bronchoconstriction in aspirin-sensitive patients receiving bisphosphonates, including Reclast. Before being given Reclast, patients should tell their doctor if they are aspirin-sensitive.

If the patient had surgery to remove some or all of the parathyroid glands in their neck, or had sections of their intestine removed, or are unable to take calcium supplements they should tell their doctor.

Reclast is given as an infusion into a vein by a nurse or a doctor, and the infusion time must not be less than 15 minutes.

On the day of treatment the patient should eat and drink normally, which includes drinking at least 2 glasses of fluid such as water within a few hours prior to the infusion, as directed by their doctor, before receiving Reclast.

After getting Reclast it is strongly recommended patients with Paget's disease take calcium in divided doses (for example, 2 to 4 times a day) for a total of 1500 mg calcium a day to prevent low blood calcium levels. This is especially important for the two weeks after getting Reclast [see WARNINGS AND PRECAUTIONS].

Adequate calcium and vitamin D intake is important in patients with osteoporosis and the current recommended daily intake of calcium is 1200 mg and vitamin D is 800 IU – 1000 IU daily. All patients should be instructed on the importance of calcium and vitamin D supplementation in maintaining serum calcium levels.

Patients should be aware of the most commonly associated side effects of therapy. Patients may experience one or more side effects that could include: fever, flu-like symptoms, myalgia, arthralgia, and headache. Most of these side effects occur within the first 3 days following the dose of Reclast. They usually resolve within 3 days of onset but may last for up to 7 to 14 days. Patients should consult their physician if they have questions or if these symptoms persist. The incidence of these symptoms decreased markedly with subsequent doses of Reclast.

Administration of acetaminophen following Reclast administration may reduce the incidence of these symptoms.

Physicians should inform their patients that there have been reports of persistent pain and/or a non-healing sore of the mouth or jaw, primarily in patients treated with bisphosphonates for other illnesses. If they experience these symptoms, they should inform their physician or dentist.

Severe and occasionally incapacitating bone, joint, and/or muscle pain have been infrequently reported in patients taking bisphosphonates, including Reclast. Consider withholding future Reclast treatment if severe symptoms develop.

Nonclinical Toxicology

Carcinogenesis, Mutagenesis, Impairment of Fertility

Carcinogenesis

Standard lifetime carcinogenicity bioassays were conducted in mice and rats. Mice were given daily oral doses of zoledronic acid of 0.1, 0.5, or 2.0 mg/kg/day. There was an increased incidence of Harderian gland adenomas in males and females in all treatment groups (at doses ≥ 0.002 times the human intravenous dose of 5 mg, based on a mg/m² comparison). Rats were given daily oral doses of zoledronic acid of 0.1, 0.5, or 2.0 mg/kg/day. No increased incidence of tumors was observed (at doses ≤ 0.1 times the human intravenous dose of 5 mg, based on a mg/m² comparison).

Mutagenesis

Zoledronic acid was not genotoxic in the Ames bacterial mutagenicity assay, in the Chinese hamster ovary cell assay, or in the Chinese hamster gene mutation assay, with or without metabolic activation. Zoledronic acid was not genotoxic in the in vivo rat micronucleus assay.

Impairment of Fertility

Female rats were given daily subcutaneous doses of zoledronic acid of 0.01, 0.03, or 0.1 mg/kg beginning 15 days before mating and continuing through gestation. Effects observed in the high-dose group (equivalent to human systemic exposure following a 5 mg intravenous dose, based on an AUC comparison) included inhibition of ovulation and a decrease in the number of pregnant rats. Effects observed in both the mid-dose group and high-dose group (0.3 to 1 times human systemic exposure following a 5 mg intravenous dose, based on an AUC comparison) included an increase in pre-implantation losses and a decrease in the number of implantations and live fetuses.

Use In Specific Populations

Pregnancy

Pregnancy Category D [see WARNINGS AND PRECAUTIONS].

RECLAST SHOULD NOT BE USED DURING PREGNANCY. If the patient becomes pregnant while taking this drug, the patient should be apprised of the potential harm to the fetus. Women of childbearing potential should be advised to avoid becoming pregnant while receiving Reclast.

Bisphosphonates are incorporated into the bone matrix, from where they are gradually released over periods of weeks to years. The extent of bisphosphonate incorporation into adult bone, and hence, the amount available for release back into the systemic circulation, is directly related to the total dose and duration of bisphosphonate use. Although there are no data on fetal risk in humans, bisphosphonates do cause fetal harm in animals, and animal data suggest that uptake of bisphosphonates into fetal bone is greater than into maternal bone. Therefore, there is a theoretical risk of fetal harm (e.g., skeletal and other abnormalities) if a woman becomes pregnant after completing a course of bisphosphonate therapy. The impact of variables such as time between cessation of bisphosphonate therapy to conception space, the particular bisphosphonate used, and the route of administration (intravenous versus oral) on this risk has not been established.

In female rats given daily subcutaneous doses of zoledronic acid beginning 15 days before mating and continuing through gestation, the number of stillbirths was increased and survival of neonates was decreased at approximately ≥ 0.3 times the anticipated human systemic exposure following a 5 mg intravenous dose (based on an AUC comparison). Adverse maternal effects were observed in all dose groups at ≥ 0.1 times the human systemic exposure following a 5 mg intravenous dose (based on an AUC comparison) and included dystocia and periparturient mortality in pregnant rats allowed to deliver. Maternal mortality was considered related to drug-induced inhibition of skeletal calcium mobilization, resulting in periparturient hypocalcemia. This appears to be a bisphosphonate class effect.

In pregnant rats given daily subcutaneous dose of zoledronic acid during gestation, adverse fetal effects were observed at about 2 and 4 times human systemic exposure following a 5 mg intravenous dose (based on an AUC comparison). These adverse effects included increases in pre- and post-implantation losses, decreases in viable fetuses, and fetal skeletal, visceral, and external malformations.

In pregnant rabbits given daily subcutaneous doses of zoledronic acid during gestation at doses I ≤ 0.4 times the anticipated human systemic exposure following a 5 mg intravenous dose (based on a mg/m² comparison) no adverse fetal effects were observed. Maternal mortality and abortion occurred in all treatment groups (at doses ≥ 0.04 times the human 5 mg intravenous dose, based on a mg/m² comparison). Adverse maternal effects were associated with, and may have been caused by, drug-induced hypocalcemia. [See Nonclinical Toxicology].

Nursing Mothers

It is not known whether Reclast is excreted in human milk. Because many drugs are excreted in human milk, and because Reclast binds to bone long-term, Reclast should not be administered to a nursing woman.

Pediatric Use

Reclast is not indicated for use in children.

The safety and effectiveness of zoledronic acid was studied in a one-year active controlled trial of 152 pediatric subjects (74 receiving zoledronic acid). The enrolled population was subjects with severe osteogenesis imperfecta, aged 1-17 years, 55% male, 84% Caucasian, with a mean lumbar spine BMD of 0.431 gm/cm², which is 2.7 standard deviations below the mean for age-matched controls (BMD Z-score of -2.7). At one year, increases in BMD were observed in the zoledronic acid treatment group. However, changes in BMD in individual patients with severe osteogenesis imperfecta did not necessarily correlate with the risk for fracture or the incidence or severity of chronic bone pain. The adverse events observed with zoledronic acid use in children did not raise any new safety findings beyond those previously seen in adults treated for Paget's disease of bone and treatment of osteoporosis including osteonecrosis of the jaw (ONJ) and renal impairment. However, adverse reactions seen more commonly in pediatric patients included pyrexia (61%), arthralgia (26%), hypocalcemia (22%) and headache (22%). These reactions, excluding arthralgia, occurred most frequently within three days after the first infusion and became less common with repeat dosing. No cases of ONJ or renal impairment were observed in this study. Because of long-term retention in bone, Reclast should only be used in children if the potential benefit outweighs the potential risk.

Plasma zoledronic acid concentration data was obtained from 10 patients with severe osteogenesis imperfecta (4 in the age group of 3-8 years and 6 in the age group of 9-17 years) infused with 0.05 mg/kg dose over 30 minutes. Mean Cmax and AUC_(0-last) was 167 ng/mL and 220 ng•h/mL respectively. The plasma concentration time profile of zoledronic acid in pediatric patients represent a multi-exponential decline, as observed in adult cancer patients at an approximately equivalent mg/kg dose.

Geriatric Use

The combined osteoporosis trials included 4863 Reclast-treated patients who were at least 65 years of age, while 2101 patients were at least 75 years old. No overall differences in efficacy or safety were observed between patients under 75 years of age with those at least 75 years of age, except that the acute phase reactions occurred less frequently in the older patients.

Of the patients receiving Reclast in the osteoporosis study in men, glucocorticoid-induced osteoporosis, and Paget's disease studies, 83, 116, and 132 patients, respectively were 65 years of age or over, while 24, 29, and 68 patients, respectively were at least 75 years of age.

However, because decreased renal function occurs more commonly in the elderly, special care should be taken to monitor renal function.

Renal Impairment

Reclast should not be used in patients with severe renal impairment (creatinine clearance < 35 mL/min) due to lack of adequate clinical experience in this population. No dosage adjustment is required in patients with a creatinine clearance of ≥ 35 mL/min [see WARNINGS AND PRECAUTIONS, CLINICAL PHARMACOLOGY]. Risk of renal impairment may increase with underlying renal disease and dehydration secondary to fever, gastrointestinal losses, diuretic therapy, etc. [see Post-Marketing Experience].

Hepatic Impairment

Reclast is not metabolized in the liver. No clinical data are available for use of Reclast in patients with hepatic impairment.

Last updated on RxList: 6/26/2009

Clinical experience with acute overdosage of zoledronic acid (Reclast) solution for intravenous infusion is limited. Patients who have received doses higher than those recommended should be carefully monitored. Overdosage may cause clinically significant renal impairment, hypocalcemia, hypophosphatemia, and hypomagnesemia. Clinically relevant reductions in serum levels of calcium, phosphorus, and magnesium should be corrected by intravenous administration of calcium gluconate, potassium or sodium phosphate, and magnesium sulfate, respectively.

Single doses of Reclast should not exceed 5 mg and the duration of the intravenous infusion should be no less than 15 minutes [see DOSAGE AND ADMINISTRATION].

Hypocalcemia

[See WARNINGS AND PRECAUTIONS].

Hypersensitivity to zoledronic acid or any components of Reclast

Hypersensitivity reactions including rare cases of urticaria, angioedema, and anaphylactic reaction/shock have been reported [see Post-Marketing Experience].

Last updated on RxList: 6/26/2009

Mechanism of Action

Reclast is a bisphosphonate and acts primarily on bone. It is an inhibitor of osteoclast-mediated bone resorption.

The selective action of bisphosphonates on bone is based on their high affinity for mineralized bone. Intravenously administered zoledronic acid rapidly partitions to bone and localizes preferentially at sites of high bone turnover. The main molecular target of zoledronic acid in the osteoclast is the enzyme farnesyl pyrophosphate synthase. The relatively long duration of action of zoledronic acid is attributable to its high binding affinity to bone mineral.

Pharmacodynamics

In the osteoporosis treatment trial, the effect of Reclast treatment on markers of bone resorption (serum beta-C-telopeptides (b-CTx)) and bone formation (bone specific alkaline phosphatase (BSAP), serum N-terminal propeptide of type I collagen (P1NP)) was evaluated in patients (subsets ranging from 517 to 1246 patients) at periodic intervals. Treatment with a 5 mg annual dose of Reclast reduces bone turnover markers to the pre-menopausal range with an approximate 55% reduction in b-CTx, a 29% reduction in BSAP and a 52 % reduction in P1NP over 36 months. There was no progressive reduction of bone turnover markers with repeated annual dosing.

Pharmacokinetics

Pharmacokinetic data in patients with osteoporosis and Paget's disease of bone are not available.

Distribution

Single or multiple (q 28 days) 5-minute or 15-minute infusions of 2, 4, 8 or 16 mg zoledronic acid were given to 64 patients with cancer and bone metastases. The post-infusion decline of zoledronic acid concentrations in plasma was consistent with a triphasic process showing a rapid decrease from peak concentrations at end-of-infusion to < 1% of Cmax 24 hours post infusion with population half-lives of t½α; 0.24 hours and t½β 1.87 hours for the early disposition phases of the drug. The terminal elimination phase of zoledronic acid was prolonged, with very low concentrations in plasma between Days 2 and 28 post infusion, and a terminal elimination half-life t½γ of 146 hours. The area under the plasma concentration versus time curve (AUC_0-24h) of zoledronic acid was dose proportional from 2 to 16 mg. The accumulation of zoledronic acid measured over three cycles was low, with mean AUC_0-24h ratios for cycles 2 and 3 versus 1 of 1.13 ± 0.30 and 1.16 ± 0.36, respectively.

In vitro and ex vivo studies showed low affinity of zoledronic acid for the cellular components of human blood. In vitro mean zoledronic acid protein binding in human plasma ranged from 28% at 200 ng/mL to 53% at 50 ng/mL.

Metabolism

Zoledronic acid does not inhibit human P450 enzymes in vitro. Zoledronic acid does not undergo biotransformation in vivo. In animal studies, < 3% of the administered intravenous dose was found in the feces, with the balance either recovered in the urine or taken up by bone, indicating that the drug is eliminated intact via the kidney. Following an intravenous dose of 20 nCi ¹⁴C-zoledronic acid in a patient with cancer and bone metastases, only a single radioactive species with chromatographic properties identical to those of parent drug was recovered in urine, which suggests that zoledronic acid is not metabolized.

Excretion

In 64 patients with cancer and bone metastases on average (± s.d.) 39 ± 16% of the administered zoledronic acid dose was recovered in the urine within 24 hours, with only trace amounts of drug found in urine post Day 2. The cumulative percent of drug excreted in the urine over 0-24 hours was independent of dose. The balance of drug not recovered in urine over 0-24 hours, representing drug presumably bound to bone, is slowly released back into the systemic circulation, giving rise to the observed prolonged low plasma concentrations. The 0-24 hour renal clearance of zoledronic acid was 3.7 ± 2.0 L/h.

Zoledronic acid clearance was independent of dose but dependent upon the patient's creatinine clearance. In a study in patients with cancer and bone metastases, increasing the infusion time of a 4 mg dose of zoledronic acid from 5 minutes (n=5) to 15 minutes (n=7) resulted in a 34% decrease in the zoledronic acid concentration at the end of the infusion ([mean ± SD] 403 ± 118 ng/mL vs. 264 ± 86 ng/mL) and a 10% increase in the total AUC (378 ± 116 ng x h/mL vs. 420 ± 218 ng x h/mL). The difference between the AUC means was not statistically significant.

Special Populations

Pediatrics: Reclast is not indicated for use in children [see Pediatric Use].

Geriatrics: The pharmacokinetics of zoledronic acid was not affected by age in patients with cancer and bone metastases whose age ranged from 38 years to 84 years.

Race: The pharmacokinetics of zoledronic acid was not affected by race in patients with cancer and bone metastases.

Hepatic Impairment: No clinical studies were conducted to evaluate the effect of hepatic impairment on the pharmacokinetics of zoledronic acid.

Renal Impairment: The pharmacokinetic studies conducted in 64 cancer patients represented typical clinical populations with normal to moderately-impaired renal function. Compared to patients with normal renal function (creatinine clearance > 80 mL/min, N=37), patients with mild renal impairment (creatinine clearance = 50-80 mL/min, N=15) showed an average increase in plasma AUC of 15%, whereas patients with moderate renal impairment (creatinine clearance = 30-50 mL/min, N=11) showed an average increase in plasma AUC of 43%. No dosage adjustment is required in patients with a creatinine clearance of ≥ 35 mL/min. Reclast is not recommended for patients with severe renal impairment (creatinine clearance < 35 mL/min) due to lack of clinical experience in this population [see WARNINGS AND PRECAUTIONS, Use in Specific Populations].

Animal Pharmacology

Bone Safety Studies

Zoledronic acid is a potent inhibitor of osteoclastic bone resorption. In the ovariectomized rat, single IV doses of zoledronic acid of 4-500 μg/kg ( < 0.1 to 3.5 times human exposure at the 5 mg intravenous dose, based on a mg/m² comparison) suppressed bone turnover and protected against trabecular bone loss, cortical thinning and the reduction in vertebral and femoral bone strength in a dose-dependent manner. At a dose equivalent to human exposure at the 5 mg intravenous dose, the effect persisted for 8 months, which corresponds to approximately 8 remodeling cycles or 3 years in humans.

In ovariectomized rats and monkeys, weekly treatment with zoledronic acid dose-dependently suppressed bone turnover and prevented the decrease in cancellous and cortical BMD and bone strength, at yearly cumulative doses up to 3.5 times the intravenous human dose of 5 mg, based on a mg/m² comparison. Bone tissue was normal and there was no evidence of a mineralization defect, no accumulation of osteoid, and no woven bone.

Reproductive and Developmental Toxicology

In female rats given subcutaneous doses of zoledronic acid of 0.01, 0.03, or 0.1 mg/kg/day beginning 15 days before mating and continuing through gestation, the number of stillbirths was increased and survival of neonates was decreased in the mid- and high-dose groups ( ≥ 0.3 times the anticipated human systemic exposure following a 5 mg intravenous dose, based on an AUC comparison). Adverse maternal effects were observed in all dose groups ( ≥ 0.1 times the human systemic exposure following a 5 mg intravenous dose, based on an AUC comparison) and included dystocia and periparturient mortality in pregnant rats allowed to deliver. Maternal mortality was considered related to drug-induced inhibition of skeletal calcium mobilization, resulting in periparturient hypocalcemia. This appears to be a bisphosphonate class effect.

In pregnant rats given daily subcutaneous dose of zoledronic acid of 0.1, 0.2, or 0.4 mg/kg during gestation, adverse fetal effects were observed in the mid-and high-dose groups (about 2 and 4 times human systemic exposure following a 5 mg intravenous dose, based on an AUC comparison). These adverse effects included increases in pre- and post-implantation losses, decreases in viable fetuses, and fetal skeletal, visceral, and external malformations. Fetal skeletal effects observed in the high-dose group included unossified or incompletely ossified bones, thickened, curved or shortened bones, wavy ribs, and shortened jaw. Other adverse fetal effects observed in the high-dose group included reduced lens, rudimentary cerebellum, reduction or absence of liver lobes, reduction of lung lobes, vessel dilation, cleft palate, and edema. Skeletal variations were also observed in the low-dose group (about 1.2 times the anticipated human systemic exposure, based on an AUC comparison). Signs of maternal toxicity were observed in the high-dose group and included reduced body weights and food consumption, indicating that maximal exposure levels were achieved in this study.

In pregnant rabbits given subcutaneous doses of zoledronic acid of 0.01, 0.03, or 0.1 mg/kg/day during gestation (at doses ≤ 0.4 times the anticipated human systemic exposure following a 5 mg intravenous dose, based on a mg/m² comparison) no adverse fetal effects were observed. Maternal mortality and abortion occurred in all treatment groups (at doses ≥ 0.04 times the human 5 mg intravenous dose, based on a mg/m² comparison). Adverse maternal effects were associated with, and may have been caused by, drug-induced hypocalcemia.

Clinical Studies

Treatment of Postmenopausal Osteoporosis

Study 1: The efficacy and safety of Reclast in the treatment of postmenopausal osteoporosis was demonstrated in Study 1, a randomized, double-blind, placebo-controlled, multinational study of 7736 women aged 65-89 years (mean age of 73) with either: a femoral neck BMD T-score less than or equal to -1.5 and at least two mild or one moderate existing vertebral fracture(s); or a femoral neck BMD T-score less than or equal to -2.5 with or without evidence of an existing vertebral fracture(s). Women were stratified into two groups: Stratum I: no concomitant use of osteoporosis therapy or Stratum II: baseline concomitant use of osteoporosis therapies which included calcitonin, raloxifene, tamoxifen, hormone replacement therapy; but excluded other bisphosphonates.

Women enrolled in Stratum I (n= 5661) were evaluated annually for incidence of vertebral fractures. All women (Strata I and II) were evaluated for the incidence of hip and other clinical fractures. Reclast was administered once a year for three consecutive years, as a single 5 mg dose in 100 mL solution infused over at least 15 minutes, for a total of three doses. All women received 1000 to 1500 mg of elemental calcium plus 400 to 1200 IU of vitamin D supplementation per day.

The two primary efficacy variables were the incidence of morphometric vertebral fractures at 3 years and the incidence of hip fractures over a median duration of 3 years. The diagnosis of an incident vertebral fracture was based on both qualitative diagnosis by the radiologist and quantitative morphometric criterion. The morphometric criterion required the dual occurrence of 2 events: a relative height ratio or relative height reduction in a vertebral body of at least 20%, together with at least a 4 mm absolute decrease in height.

Effect on Vertebral Fractures

Reclast significantly decreased the incidence of new vertebral fractures at one, two, and three years as shown in Table 5.

Table 5 :  Proportion of Patients with New Morphometric Vertebral Fractures

Outcome	Reclast (%)	Placebo (%)	Absolute Reduction in Fracture Incidence % (95% CI)	Relative Reduction in Fracture Incidence % (95% CI)
At least one new vertebral fracture (0–1 year)	1.5	3.7	2.2	60
			(1.4, 3.1)	(43, 72)**
At least one new vertebral fracture (0–2 years)	2.2	7.7	5.5	71
			(4.4, 6.6)	(62, 78)**
At least one new vertebral fracture (0–3 years)	3.3	10.9	7.6	70
			(6.3, 9.0)	(62, 76)**
** p < 0.0001

The reductions in vertebral fractures over three years were consistent (including new/worsening and multiple vertebral fractures) and significantly greater than placebo regardless of age, geographical region, baseline body mass index, number of baseline vertebral fractures, femoral neck BMD T-score, or prior bisphosphonate usage.

Effect on Hip Fracture over 3 years

Reclast demonstrated a 1.1% absolute reduction and 41% relative reduction in the risk of hip fractures over a median duration of follow-up of 3 years. The hip fracture event rate was 1.4% for Reclast-treated patients compared to 2.5% for placebo-treated patients.

Figure 1 : Cumulative Incidence of Hip Fracture Over 3 Years

The reductions in hip fractures over three years were greater for Reclast than placebo regardless of femoral neck BMD T-score.

Effect on All Clinical Fractures

Reclast demonstrated superiority to placebo in reducing the incidence of all clinical fractures, clinical (symptomatic) vertebral and non-vertebral fractures (excluding finger, toe, facial, and clinical thoracic and lumbar vertebral fractures). All clinical fractures were verified based on the radiographic and/or clinical evidence. A summary of results is presented in Table 6.

Table 6 : Between –Treatment Comparisons of the Incidence of Clinical Fracture Variables Over 3 Years

Outcome	Reclast (N= 3875) Event Rate n (%)+	Placebo (N= 3861) Event Rate n (%)+	Absolute Reduction in Fracture Incidence % (95% CI)+	Relative Risk Reduction in Fracture Incidence % (95% CI)
Any clinical fracture (1)	308 (8.4)	456 (12.8)	4.4 (3.0, 5.8)	33 (23, 42)**
Clinical vertebral fracture (2)	19 (0.5)	84 (2.6)	2.1 (1.5, 2.7)	77 (63, 86)**
Non-vertebral fracture (3)	292 (8.0)	388 (10.7)	2.7 (1.4, 4.0)	25 (13, 36)*
*p-value < 0.001, **p-value < 0.0001 + Event rates based on Kaplan-Meier estimates at 36 months (1) Excluding finger, toe, and facial fractures (2) Includes clinical thoracic and clinical lumbar vertebral fractures (3) Excluding finger, toe, facial, and clinical thoracic and lumbar vertebral fractures

Effect on Bone Mineral Density (BMD)

Reclast significantly increased BMD at the lumbar spine, total hip and femoral neck, relative to treatment with placebo at time points 12, 24, and 36 months. Treatment with Reclast resulted in a 6.7% increase in BMD at the lumbar spine, 6.0 % at the total hip, and 5.1% at the femoral neck, over 3 years as compared to placebo.

Bone Histology

Bone biopsy specimens were obtained between Months 33 and 36 from 82 postmenopausal patients with osteoporosis treated with 3 annual doses of Reclast. Of the biopsies obtained, 81 were adequate for qualitative histomorphometry assessment, 59 were adequate for partial quantitative histomorphometry assessment, and 38 were adequate for full quantitative histomorphometry assessment. Micro CT analysis was performed on 76 specimens. Qualitative, quantitative and micro CT assessments showed bone of normal architecture and quality without mineralization defects.

Effect on Height

In the 3-year osteoporosis study standing height was measured annually using a stadiometer. The Reclast group revealed less height loss compared to placebo (4.2 mm vs. 7.0 mm, respectively (p < 0.001)).

Study 2: The efficacy and safety of Reclast in the treatment of patients with osteoporosis who suffered a recent low-trauma hip fracture was demonstrated in Study 2, a randomized, double-blind, placebo-controlled, multinational endpoint study of 2127 men and women aged 50-95 years (mean age of 74.5). Concomitant osteoporosis therapies excluding other bisphosphonates and parathyroid hormone were allowed. Reclast was administered once a year as a single 5 mg dose in 100 mL solution, infused over at least 15 minutes. The study continued until at least 211 patients had confirmed clinical fractures in the study population. Vitamin D levels were not routinely measured but a loading dose of vitamin D (50,000 to 125,000 IU orally or IM) was given to patients and they were started on 1000 to 1500 mg of elemental calcium plus 800 to 1200 IU of vitamin D supplementation per day for at least 14 days prior to the study drug infusions. The primary efficacy variable was the incidence of clinical fractures over the duration of the study.

Reclast significantly reduced the incidence of any clinical fracture by 35%. There was also a 46% reduction in the risk of a clinical vertebral fracture (Table 7).

Table 7 : Between - Treatment Comparisons of the Incidence of Key Clinical Fracture Variables

Outcome	Reclast (N=1065) Event Rate n (%)+	Placebo (N=1062) Event Rate n (%)+	Absolute Reduction in Fracture Incidence % (95% CI) +	Relative Risk Reduction in Fracture Incidence % (95% CI)
Any clinical fracture (1)	92 (8.6)	139 (13.9)	5.3 (2.3, 8.3)	35 (16, 50)**
Clinical vertebral fracture (2)	21 (1.7)	39 (3.8)	2.1 (0.5, 3.7)	46 (8, 68)*
*p-value < 0.05, **p-value < 0.005 + Event rates based on Kaplan-Meier estimates at 24 months (1) Excluding finger, toe and facial fractures (2) Including clinical thoracic and clinical lumbar vertebral fractures

Effect on Bone Mineral Density (BMD)

Reclast significantly increased BMD relative to placebo at the hip and femoral neck at all timepoints (12, 24, and 36 months). Treatment with Reclast resulted in a 6.4 % increase in BMD at the total hip and a 4.3% increase at the femoral neck over 36 months as compared to placebo.

Prevention of Postmenopausal Osteoporosis

The efficacy and safety of Reclast in postmenopausal women with osteopenia (low bone mass) was assessed in a 2-year randomized, multi-center, double-blind, placebo-controlled study of 581 postmenopausal women aged ≥ 45 years, who were stratified by years since menopause: Stratum I women < 5 years from menopause (n = 224); Stratum II women ≥ 5 years from menopause (n= 357). Patients within Stratum I and II were randomized to one of three treatment groups: (1) Reclast given at randomization and at Month 12 (n=77) in Stratum I and (n=121) in Stratum II; (2) Reclast given at randomization and placebo at Month 12 (n=70) in Stratum I and (n=111) in Stratum II; and (3) Placebo given at randomization and Month 12 (n=202). Reclast was administered as a single 5 mg dose in 100 mL solution infused over at least 15 minutes. All women received 500 to 1200 mg elemental calcium plus 400 to 800 IU vitamin D supplementation per day. The primary efficacy variable was the percent change of BMD at 24 Months relative to baseline.

Effect on Bone Mineral Density (BMD)

Reclast significantly increased lumbar spine BMD relative to placebo at Month 24 across both strata. Reclast given once at randomization (and placebo given at Month 12) resulted in 4.0% increase in BMD in Stratum I patients and 4.8% increase in Stratum II patients over 24 months. Placebo given at randomization and at Month 12 resulted in 2.2% decrease in BMD in Stratum I patients and 0.7% decrease in BMD in Stratum II patients over 24 months. Therefore, Reclast given once at randomization (and placebo given at Month 12) resulted in a 6.3% increase in BMD in Stratum I patients and 5.4% increase in Stratum II patients over 24 months as compared to placebo (both p < 0.0001).

Reclast also significantly increased total hip BMD relative to placebo at Month 24 across both strata. Reclast given once at randomization (and placebo given at Month 12) resulted in 2.6% increase in BMD in Stratum I patients and 2.1% in Stratum II patients over 24 months. Placebo given at randomization and at Month 12 resulted in 2.1% decrease in BMD in Stratum I patients and 1.0% decrease in BMD in Stratum II patients over 24 months. Therefore, Reclast given once at randomization (and placebo given at Month 12) resulted in a 4.7% increase in BMD in Stratum I patients and 3.2% increase in Stratum II patients over 24 months as compared to placebo (both p < 0.0001).

Osteoporosis in Men

The efficacy and safety of Reclast in men with osteoporosis or significant osteoporosis secondary to hypogonadism, was assessed in a randomized, multicenter, double-blind, active controlled, study of 302 men aged 25-86 years (mean age of 64). The duration of the trial was two years. Patients were randomized to either Reclast which was administered once annually as a 5 mg dose in 100 mL infused over 15 minutes for a total of up to two doses, or to an oral weekly bisphosphonate (active control) for up to two years. All participants received 1000 mg of elemental calcium plus 800 to 1000 IU of vitamin D supplementation per day.

Effect on Bone Mineral Density (BMD)

An annual infusion of Reclast was non-inferior to the oral weekly bisphosphonate active control based on the percentage change in lumbar spine BMD at Month 24 relative to baseline (Reclast: 6.1% increase; active control: 6.2% increase).

Treatment and Prevention of Glucocorticoid-Induced Osteoporosis

The efficacy and safety of Reclast to prevent and treat glucocorticoid-induced osteoporosis (GIO) was assessed in a randomized, multicenter, double-blind, stratified, active controlled study of 833 men and women aged 18-85 years (mean age of 54.4 years) treated with > 7.5 mg/day oral prednisone (or equivalent). Patients were stratified according to the duration of their pre-study corticosteroid therapy: < 3 months prior to randomization (prevention subpopulation), and > 3 months prior to randomization (treatment subpopulation). The duration of the trial was one year. Patients were randomized to either Reclast which was administered once as a 5 mg dose in 100 mL infused over 15 minutes, or to an oral daily bisphosphonate (active control) for one year. All participants received 1000 mg of elemental calcium plus 400 to 1000 IU of vitamin D supplementation per day.

Effect on Bone Mineral Density (BMD)

In the GIO treatment subpopulation, Reclast demonstrated a significant mean increase in lumbar spine BMD compared to the active control at one year (Reclast 4.1%, active control 2.7%) with a treatment difference of 1.4% (p < 0.001). In the GIO prevention subpopulation, Reclast demonstrated a significant mean increase in lumbar spine BMD compared to active control at one year (Reclast 2.6%, active control 0.6%) with a treatment difference of 2.0% (p < 0.001).

Bone Histology

Bone biopsy specimens were obtained from 23 patients (12 in the Reclast treatment group and 11 in the active control treatment group) at Month 12 treated with an annual dose of Reclast or daily oral active control. Qualitative assessments showed bone of normal architecture and quality without mineralization defects. Apparent reductions in activation frequency and remodeling rates were seen when compared with the histomorphometry results seen with Reclast in the postmenopausal osteoporosis population. The long-term consequences of this degree of suppression of bone remodeling in glucocorticoid-treated patients is unknown.

Treatment of Paget's Disease of Bone

Reclast was studied in male and female patients with moderate to severe Paget's disease of bone, defined as serum alkaline phosphatase level at least twice the upper limit of the age-specific normal reference range at the time of study entry. Diagnosis was confirmed by radiographic evidence.

The efficacy of one infusion of 5 mg Reclast vs. oral daily doses of 30 mg risedronate for 2 months was demonstrated in two identically designed 6-month randomized, double blind trials. The mean age of patients in the two trials was 70. Ninety-three percent (93%) of patients were Caucasian. Therapeutic response was defined as either normalization of serum alkaline phosphatase (SAP) or a reduction of at least 75% from baseline in total SAP excess at the end of 6 months. SAP excess was defined as the difference between the measured level and midpoint of normal range.

In both trials Reclast demonstrated a superior and more rapid therapeutic response compared with risedronate and returned more patients to normal levels of bone turnover, as evidenced by biochemical markers of formation (SAP, serum N-terminal propeptide of type I collagen [P1NP]) and resorption (serum CTx 1 [cross-linked C-telopeptides of type I collagen] and urine α-CTx).

The 6-month combined data from both trials showed that 96% (169/176) of Reclast-treated patients achieved a therapeutic response as compared with 74% (127/171) of patients treated with risedronate. Most Reclast patients achieved a therapeutic response by the Day 63 visit. In addition, at 6 months, 89% (156/176) of Reclast-treated patients achieved normalization of SAP levels, compared to 58% (99/171) of patients treated with risedronate (p < 0.0001) (see Figure 2).

Figure 2 : Therapeutic Response/Serum Alkaline Phosphatase (SAP) Normalization Over Time

The therapeutic response to Reclast was similar across demographic and disease-severity groups defined by gender, age, previous bisphosphonate use, and disease severity. At 6 months, the percentage of Reclast-treated patients who achieved therapeutic response was 97% and 95%, respectively, in each of the baseline disease severity subgroups (baseline SAP < 3xULN, ≥ 3xULN) compared to 75% and 74%, respectively, for the same disease severity subgroups of risedronate-treated patients.

In patients who had previously received treatment with oral bisphosphonates, therapeutic response rates were 96% and 55% for Reclast and risedronate, respectively. The comparatively low risedronate response was due to the low response rate (7/23, 30%) in patients previously treated with risedronate. In patients naïve to previous treatment, a greater therapeutic response was also observed with Reclast (98%) relative to risedronate (86%). In patients with symptomatic pain at screening, therapeutic response rates were 94% and 70% for Reclast and risedronate respectively. For patients without pain at screening, therapeutic response rates were 100% and 82% for Reclast and risedronate respectively.

Bone histology was evaluated in 7 patients with Paget's disease 6 months after being treated with Reclast 5 mg. Bone biopsy results showed bone of normal quality with no evidence of impaired bone remodeling and no evidence of mineralization defect.

Last updated on RxList: 6/26/2009

Reclast®
(pronounced RE-klast)
(zoledronic acid) Injection

Read this leaflet carefully before your first infusion of Reclast and before each infusion. There may be new information. This leaflet does not replace talking with your healthcare professional.

What is the most important information I should know about Reclast?

Patients with severe kidney problems should not receive Reclast Injection.

Low blood calcium should be corrected prior to receiving Reclast. If you are being treated for Paget's disease of the bone it is important to take 1500 mg of calcium and 800 IU of vitamin D daily, especially during the first 2 weeks after getting Reclast. You should take calcium and vitamin D daily as recommended by your healthcare professional.

What is Reclast?

Reclast is a prescription medicine used to:

• Treat osteoporosis in women after menopause, and in patients after a recent hip fracture
• Prevent osteoporosis in women after menopause
• Increase bone mass in men with osteoporosis
• Treat and prevent osteoporosis in men and women caused by treatment with steroid medicines such as prednisone
• Treat men and women with Paget's disease of the bone Reclast strengthens your bones by increasing bone mass and lowers the chance of breaking bones (fractures).

Who should not get Reclast?

You should not get Reclast if:

• Your blood calcium level is too low.
• You are allergic to zoledronic acid or any other ingredient in Reclast. See section ‘What are the ingredients in Reclast' for a complete list of ingredients.

Talk to your healthcare provider before taking this medication if you have any of these conditions.

What should I tell my doctor before getting Reclast?

Reclast may not be right for you. Tell your doctor about all your medical conditions, including if you:

• have kidney problems
• have or have had low blood calcium
• are not able to take daily calcium and vitamin D supplements
• had parathyroid or thyroid surgery (these glands are located in your neck)
• have trouble absorbing minerals in your stomach or intestines (“malabsorption syndrome”)
• had sections of your intestine removed
• have asthma (wheezing) from taking aspirin
• have a planned dental surgery such as tooth extraction
• are pregnant or plan to become pregnant; Reclast may harm your unborn baby
• are breast-feeding or planning to breast-feed. It is not known if Reclast passes into breast milk.
• have recent vomiting, diarrhea or decreased appetite

Tell your doctor about all the medicines you take, including prescription and nonprescription drugs, vitamins and minerals, and herbal supplements. Some medicines may increase your chance for low blood calcium levels or kidney problems when used with Reclast. Especially tell your doctor if you are taking:

• Zometa
• A diuretic or “water pill”
• Non-steroidal anti-inflammatory medicines (NSAIDS).
• An antibiotic. Certain antibiotics called aminoglycosides may increase the effect of Reclast in lowering your blood calcium for a long period of time.

Ask your healthcare provider or pharmacist to learn if your medicine is one that is listed above.

Know the medicines you take. Keep a list of your medicines and show it to your healthcare provider and pharmacist each time you get a new medicine.

How will I receive Reclast?

• Reclast is always given to you by a healthcare provider. Reclast is given by infusion into a vein (IV) that should take at least 15 minutes.
• Before you receive Reclast, drink at least 2 glasses of fluid (such as water) within a few hours as directed by your healthcare provider. You may eat normally before your infusion.

For Osteoporosis:

• To treat osteoporosis Reclast is given once a year
• To prevent osteoporosis Reclast is given once every 2 years
• In patients with osteoporosis, the current recommended daily intake of calcium is 1200 mg and vitamin D 800 IU to 1000 IU daily. If you have osteoporosis you should take calcium and vitamin D daily as recommended by your doctor.
• During treatment with Reclast, your doctor may order a bone mineral density test to check your osteoporosis.

For Paget's Disease:

• Is given as a single treatment or your doctor may choose to give you more Reclast infusions based on signs or symptoms of your disease.
• To prevent low blood calcium, it is important to take calcium and vitamin D supplements. If you have Paget's disease you should take 1500 mg of calcium a day in divided doses (for example, 750 mg two times a day, or 500 mg three times a day) and 800 IU vitamin D a day. It is especially important to take the calcium and vitamin D supplements during the first 2 weeks after getting Reclast.
• During treatment with Reclast, your doctor may order a blood test to check your Paget's disease.

What are the possible side effects of Reclast?

Reclast may cause serious side effects. Call your healthcare provider right away if you have any of these symptoms after receiving Reclast:

• Low blood calcium (hypocalcemia). Symptoms may include numbness or tingling feeling (especially in the area around the mouth) or muscle spasms. Call your doctor right away if you notice any of these symptoms after receiving Reclast.
• Kidney problems. Your doctor may do a blood test to check your kidneys before each dose of Reclast. It is important for you to drink at least 2 glasses of fluid (such as water), within a few hours before receiving Reclast, as directed by your healthcare provider.
• Jaw-bone problems (Osteonecrosis of the jaw). Jaw-bone problems may occur in some people and include: infection, slower healing after teeth are pulled.
• Severe muscle, bone and joint pain. Tell your doctor if you have severe muscle, bone, or joint pain after receiving Reclast.

The most common side effects of Reclast include: flu-like illness, fever, pain in your muscles or joints, and headache that can happen over several days after you get Reclast. Ask your healthcare provider how to lessen these symptoms. Acetaminophen (a mild pain reliever) may reduce these symptoms. The side effects lessen each time you receive Reclast.

Tell your healthcare provider about any side effect that bothers you or does not go away. These are not all the possible side effects of Reclast. If you have questions, talk to your healthcare provider.

Call your healthcare provider for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

General Information about Reclast

Medicines are sometimes prescribed for conditions that are not mentioned in patient information leaflets.

This leaflet is a summary of the most important information about Reclast. If you would like more information, talk with your healthcare provider. You can ask your healthcare provider or pharmacist for information about Reclast that is written for healthcare professionals. For more information, go to www.reclast.com or call 1-866732-5278.

What are the ingredients in Reclast?

Active ingredient: zoledronic acid. Inactive ingredients: mannitol, USP; sodium citrate, USP; and water for injection, USP.

What is Osteoporosis?

Osteoporosis is a disease that involves a thinning and weakening of bones. Weaker bone can break more easily. Throughout life your body keeps your bones strong and healthy by replacing old bone with new bone. In osteoporosis, however, the body removes bone faster than it is formed. This causes loss of bone mass and weakening of bones. Weak bones are more likely to break. Osteoporosis is common in women after menopause, with increasing age, and may also occur in men. People who have an increased risk of osteoporosis: 1) are Caucasian (white) or Asian; 2) are thin; 3) have a family member with osteoporosis; 4) do not get enough calcium or vitamin D; 5) do not exercise; 6) smoke or drink alcohol often or 7) take medicines that cause bone loss (like prednisone – a steroid) over a period of time.

At first, osteoporosis usually has no symptoms, but people with osteoporosis are more likely to break (fracture) their bones. Fractures most often occur at the hip, back (spine), or wrist bones. Fractures of the spine may not be painful, but over time they can make you shorter. Over time fractures can lead to pain, severe disability, or loss of ability to move around. Reclast strengthens your bones and therefore makes them less likely to break.

What is Paget's disease of bone?

Normally bone breaks down and is replaced by new bone. In Paget's disease, bone breaks down too much and the new bone made is not normal. Bones affected by Paget's disease like the skull, spine, and legs, become deformed and weaker than normal. This can cause problems like bone pain and the bones can bend or break.

Last updated on RxList: 6/26/2009

IMPORTANT NOTE: This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your health care professional. Always seek the advice of your health care professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your health care professional. This information does not contain any assurances that this product is safe, effective, or appropriate for you.

ZOLEDRONIC ACID SOLUTION - INJECTION

(ZOLE-eh-dron-ick)

COMMON BRAND NAME(S): Reclast

USES: This medication is used to treat a certain type of bone disease (Paget's disease) that causes abnormal and weak bones. Zoledronic acid is also used to treat bone loss (osteoporosis) in women after menopause. It works by slowing the breakdown of bone and keeping bones strong. It also helps to reduce the risk of broken bones (fractures). This medication belongs to a class of drugs known as bisphosphonates.

Another zoledronic acid product is used to treat bone problems that may occur with cancer. The 2 products should not be used together.

HOW TO USE: This medicine comes with a Patient Information Leaflet. Read it carefully. Ask your doctor, nurse, or pharmacist any questions that you may have about this medicine.

This medication is given as a single dose by a health care professional. It is given slowly into a vein over at least 15 minutes. Health care professionals must follow all the manufacturer's instructions for properly preparing and giving this drug. Check this product visually for particles or discoloration before using. If either is present, do not use the liquid. If you have any questions about using this medication properly, consult your doctor or pharmacist.

Eat and drink normally on the day of treatment. Drink at least 2 glasses of fluid before treatment unless otherwise directed by your doctor. It is very important that you get plenty of fluids when you are given this medication.

Your doctor may direct you to take calcium and vitamin D each day. If you have Paget's disease, it is especially important that you take the directed amount of calcium and vitamin D during the 2 weeks after your zoledronic acid dose. Vitamin D and calcium are very important to prevent low levels of calcium in the blood. Tell your doctor immediately if you have any symptoms of low calcium such as numbness/tingling (especially around the lips/mouth) and muscle spasms.

The dosage is based on your medical condition and response to treatment. The usual maximum adult dose is 5 milligrams.

For the treatment of Paget's disease, this medication is given as a single dose and may be repeated based on your symptoms. For the treatment of osteoporosis, this medication is given as a single dose once a year.

SIDE EFFECTS: Nausea, tiredness, flu-like symptoms (e.g., fever, chills, muscle/joint aches), dizziness, headache, or pain/redness/swelling at the injection site may occur. Most of these side effects are mild and occur within 3 days of treatment. Flu-like symptoms may be reduced by taking acetaminophen or ibuprofen after the treatment. If any of these effects worsen or last more than 4 days, tell your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur: increased or severe bone/joint/muscle pain, jaw pain, unusual weakness, eye problems (e.g., redness/itching/swelling, sensitivity to light), muscle spasms, numb/tingling skin, sores in jaw/mouth, change in the amount of urine.

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching, swelling, severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

Contact your doctor for medical advice about side effects. The following numbers do not provide medical advice, but in the US you may report side effects to the Food and Drug Administration (FDA) at 1-800-FDA-1088. In Canada, you may call Health Canada at 1-866-234-2345.

PRECAUTIONS: Before using zoledronic acid, tell your doctor or pharmacist if you are allergic to it; or to other bisphosphonates such as alendronate or risedronate; or if you have trouble breathing (wheezing) after taking aspirin; or if you have any other allergies.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: low calcium levels in the blood, problem taking calcium/vitamin D supplements, recent or planned dental surgery (e.g., tooth removal), certain gut problems (malabsorption, surgery on the small intestine), kidney problems, treatment with zoledronic acid (e.g., for cancer), parathyroid/thyroid problems (e.g., hypoparathyroidism, thyroid/parathyroid surgery), severe loss of body water (dehydration).

Infrequently, serious jawbone problems (osteonecrosis) have occurred in people using this medication. Dental surgery, cancer, certain medications (chemotherapy, corticosteroids such as prednisone), or poor dental hygiene may increase the risk. See your dentist for a full examination/treatment before your dose of zoledronic acid. Tell your dentist that you will be using zoledronic acid, and make sure he or she knows of all your medications and medical history, especially of any cancer radiation treatments. Tell your doctor or dentist immediately if you have persistent jaw pain or sores in the mouth or jaw that do not heal.

This medication may cause severe kidney problems. Consult your doctor or pharmacist for more information. To help prevent harm to your kidneys, drink plenty of fluids unless otherwise directed by your doctor. (See also How to Use section.)

This drug may make you dizzy. Use caution while driving, using machinery or doing any other activity that requires alertness. Limit alcoholic beverages.

This medication should not be used during pregnancy. It may harm an unborn baby. If you become pregnant or think you may be pregnant, tell your doctor immediately. Consult your doctor for information on reliable forms of birth control.

It is not known whether this drug passes into breast milk. Because of possible harm to the nursing infant, breast-feeding while using this drug is not recommended. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor or pharmacist first.

Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: mineral supplements (especially those containing calcium, magnesium, or phosphorus), "water pills" (diuretics such as bumetanide, furosemide, hydrochlorothiazide).

Also tell your doctor or pharmacist of drugs that may be harmful to your kidneys such as: aminoglycoside antibiotics (e.g., gentamicin, tobramycin), amphotericin B, cyclosporine, nonsteroidal anti-inflammatory drugs (NSAIDs such as ibuprofen), tacrolimus, vancomycin.

This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.

OVERDOSE: If overdose is suspected, contact your local poison control center or emergency room immediately. US residents can call the US National Poison Hotline at 1-800-222-1222. Canada residents can call a provincial poison control center.

NOTES: Lifestyle changes that help promote healthy bones include increasing weight-bearing exercise, stopping smoking, limiting alcohol, and eating well-balanced meals that contain adequate calcium and vitamin D. Since you may also need to take calcium and vitamin D supplements and make lifestyle changes, consult your doctor for specific advice.

Laboratory and/or medical tests (e.g., calcium/phosphate/magnesium blood levels, bone density tests, kidney tests) will be performed to monitor your progress or check for side effects. Consult your doctor for more details.

MISSED DOSE: Not applicable.

STORAGE: Store the unopened bottles at room temperature between 59-86 degrees F (15-30 degrees C) away from light and moisture. After opening, this product should be refrigerated between 36-46 degrees F (2-8 degrees C) and used within 24 hours. Discard any unused drug after 24 hours. Keep all medicines away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.

Information last revised July 2008 Copyright(c) 2008 First DataBank, Inc.