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Khedezla

Last reviewed on RxList: 2/11/2019
Drug Description

KHEDEZLA
(desvenlafaxine) Extended-release Tablets

WARNING

SUICIDAL THOUGHTS AND BEHAVIORS

Antidepressants increased the risk of suicidal thoughts and behavior in children, adolescents, and young adults in short-term studies. These studies did not show an increase in the risk of suicidal thoughts and behavior with antidepressant use in patients over age 24; there was a reduction in risk with antidepressant use in patients aged 65 and older [see WARNINGS AND PRECAUTIONS].

In patients of all ages who are started on antidepressant therapy, monitor closely for worsening, and for emergence of suicidal thoughts and behaviors. Advise families and caregivers of the need for close observation and communication with the prescriber [see WARNINGS AND PRECAUTIONS].

KHEDEZLA is not approved for use in pediatric patients [see Use In Specific Populations].

DESCRIPTION

KHEDEZLA Extended-release Tablets for oral administration contains desvenlafaxine, a structurally novel SNRI for the treatment of MDD. Desvenlafaxine (O-desmethylvenlafaxine) is the major active metabolite of the antidepressant venlafaxine, a medication used to treat major depressive disorder.

Desvenlafaxine is designated RS-4-[2-dimethylamino-1-(1-hydroxycyclohexyl)ethyl]phenol and has the empirical formula of C16H25NO2. Desvenlafaxine has a molecular weight of 263.38. The structural formula is shown below.

KHEDEZLA (desvenlafaxine) Structural Formula Illustration

* Chiral Centre

Desvenlafaxine is a white to off-white crystalline powder that is sparingly soluble in dimethyl sulfoxide. The solubility of desvenlafaxine is pH dependent.

KHEDEZLA is formulated as an extended-release tablet for once-a-day oral administration.

Each 50 mg or 100 mg extended-release tablet contains 50 or 100 mg of desvenlafaxine, respectively.

Inactive ingredients for the 50 mg tablet consist of citric acid monohydrate, hypromellose, microcrystalline cellulose, talc, magnesium stearate and colloidal silicon dioxide, and film coating, which consist of titanium dioxide, polyethylene glycol, talc, polyvinyl alcohol and iron oxides.

Inactive ingredients for the 100 mg tablet consist of citric acid monohydrate, hypromellose, microcrystalline cellulose, talc, magnesium stearate and colloidal silicon dioxide, and film coating, which consist of hypromellose, titanium dioxide, polyethylene glycol, talc, polyvinyl alcohol, iron oxides, and FD&C yellow #6.

Indications & Dosage

INDICATIONS

KHEDEZLA, a serotonin and norepinephrine reuptake inhibitor (SNRI), is indicated for the treatment of major depressive disorder (MDD) [see Clinical Studies and DOSAGE AND ADMINISTRATION]. The efficacy of desvenlafaxine has been established in four short-term (8-week, placebo-controlled studies) in adult outpatients who met DSM-IV criteria for major depressive disorder.

DOSAGE AND ADMINISTRATION

General Instruction For Use

The recommended dose for KHEDEZLA is 50 mg once daily, with or without food.

In clinical studies, doses of 50 mg to 400 mg per day were shown to be effective, although no additional benefit was demonstrated at doses greater than 50 mg per day and adverse reactions and discontinuations were more frequent at higher doses.

When discontinuing therapy, gradual dose reduction is recommended whenever possible to minimize discontinuation symptoms [see Discontinuing KHEDEZLA and WARNINGS AND PRECAUTIONS].

KHEDEZLA should be taken at approximately the same time each day. Tablets must be swallowed whole with fluid and not divided, crushed, chewed, or dissolved.

Special Populations

Patients With Renal Impairment

The maximum recommended dose in patients with moderate renal impairment (24-hr creatinine clearance [CrCl] = 30 to 50 mL/min, Cockcroft-Gault [C-G]) is 50 mg per day. The maximum recommended dose in patients with severe renal impairment (24-hr CrCl less than 30 mL/min, C-G) or end-stage renal disease (ESRD) is 50 mg every other day. Supplemental doses should not be given to patients after dialysis [see Use In Specific Populations and CLINICAL PHARMACOLOGY].

Patients with Hepatic Impairment

The recommended dose in patients with moderate to severe hepatic impairment is 50 mg per day. Dose escalation above 100 mg per day is not recommended [see CLINICAL PHARMACOLOGY].

Maintenance/Continuation/Extended Treatment

It is generally agreed that acute episodes of major depressive disorder require several months or longer of sustained pharmacologic therapy. Patients should be periodically reassessed to determine the need for continued treatment.

Discontinuing KHEDEZLA

Symptoms associated with discontinuation of KHEDEZLA, other SNRIs and SSRIs have been reported [see WARNINGS AND PRECAUTIONS]. Patients should be monitored for these symptoms when discontinuing treatment. A gradual reduction in the dose rather than abrupt cessation is recommended whenever possible. If intolerable symptoms occur following a decrease in the dose or upon discontinuation of treatment, then resuming the previously prescribed dose may be considered. Subsequently, the physician may continue decreasing the dose, but at a more gradual rate.

Switching Patients From Other Antidepressants To KHEDEZLA

Discontinuation symptoms have been reported when switching patients from other antidepressants, including venlafaxine, to desvenlafaxine. Tapering of the initial antidepressant may be necessary to minimize discontinuation symptoms.

Switching Patients To Or From A Monoamine Oxidase Inhibitor (MAOI) Intended To Treat Psychiatric Disorders

At least 14 days should elapse between discontinuation of an MAOI intended to treat psychiatric disorders and initiation of therapy with KHEDEZLA. Conversely, at least 7 days should be allowed after stopping KHEDEZLA before starting an MAOI intended to treat psychiatric disorders [see CONTRAINDICATIONS].

Use Of KHEDEZLA With Other MAOIs Such As Linezolid Or Methylene Blue

Do not start KHEDEZLA in a patient who is being treated with linezolid or intravenous methylene blue because there is increased risk of serotonin syndrome. In a patient who requires more urgent treatment of a psychiatric condition, other interventions, including hospitalization, should be considered [see CONTRAINDICATIONS].

In some cases, a patient already receiving KHEDEZLA therapy may require urgent treatment with linezolid or intravenous methylene blue. If acceptable alternatives to linezolid or intravenous methylene blue treatment are not available and the potential benefits of linezolid or intravenous methylene blue treatment are judged to outweigh the risks of serotonin syndrome in a particular patient, KHEDEZLA should be stopped promptly, and linezolid or intravenous methylene blue can be administered. The patient should be monitored for symptoms of serotonin syndrome for 7 days or until 24 hours after the last dose of linezolid or intravenous methylene blue, whichever comes first. Therapy with KHEDEZLA may be resumed 24 hours after the last dose of linezolid or intravenous methylene blue [see WARNINGS AND PRECAUTIONS].

The risk of administering methylene blue by non-intravenous routes (such as oral tablets or by local injection) or in intravenous doses much lower than 1 mg/kg with KHEDEZLA is unclear. The clinician should, nevertheless, be aware of the possibility of emergent symptoms of serotonin syndrome with such use [see WARNINGS AND PRECAUTIONS].

HOW SUPPLIED

Dosagae Forms And Strengths

KHEDEZLA (desvenlafaxine) Extended-release Tablets are available as 50 and 100 mg tablets.

  • 50 mg, pink round tablet debossed with “OS” on one side and “231” on the other side.
  • 100 mg, brown round tablet debossed with “OS” on one side and “232” on the other side.

Storage And Handling

KHEDEZLA (desvenlafaxine) Extended-release Tablets are available as follows:

50 mg, Pink, Round Tablet Debossed With "OS" On One Side And "231" On The Other

NDC 65224-880-31, bottle of 30 tablets in unit-of-use package
NDC 65224-880-90, bottle of 90 tablets in unit-of-use package

100 mg, Brown, Round Tablet Debossed With “OS” On One Side And "232" On The Other

NDC 65224-890-31, bottle of 30 tablets in unit-of-use package
NDC 65224-890-90, bottle of 90 tablets in unit-of-use package

Store at 20° to 25°C (68° to 77°F); excursions permitted to 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature].

Each 50 mg or 100 mg KHEDEZLA Extended-release Tablet contains 50 or 100 mg of desvenlafaxine, respectively.

Manufactured By: Alcami 1726 North 23rd Street, Wilmington, NC 28405. Revised: Nov 2017

QUESTION

Depression is a(n) __________ . See Answer
Side Effects

SIDE EFFECTS

The following adverse reactions are discussed in greater detail in other sections of the label.

  • Hypersensitivity [see CONTRAINDICATIONS]
  • Suicidal Thoughts and Behaviors in Pediatric and Young Adult Patients [see WARNINGS AND PRECAUTIONS]
  • Serotonin Syndrome [see WARNINGS AND PRECAUTIONS]
  • Elevated Blood Pressure [see WARNINGS AND PRECAUTIONS]
  • Increased Risk of Bleeding [see WARNINGS AND PRECAUTIONS]
  • Angle Closure Glaucoma [see WARNINGS AND PRECAUTIONS]
  • Activation of Mania/Hypomania [see WARNINGS AND PRECAUTIONS]
  • Discontinuation Syndrome [see WARNINGS AND PRECAUTIONS]
  • Seizure [see WARNINGS AND PRECAUTIONS]
  • Hyponatremia [see WARNINGS AND PRECAUTIONS]
  • Interstitial Lung Disease and Eosinophilic Pneumonia [see WARNINGS AND PRECAUTIONS]

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 studies of another drug and may not reflect the rates observed in practice.

Patient Exposure

Desvenlafaxine was evaluated for safety in 4,158 patients diagnosed with major depressive disorder who participated in multiple-dose pre-marketing studies, representing 1,677 patient-years of exposure. Among these 4,158 desvenlafaxine treated patients; 1,834 patients were exposed to desvenlafaxine in 8-week, placebo-controlled studies at doses ranging from 50 to 400 mg/day. Out of the 1,834 patients, 687 desvenlafaxine treated patients continued into a 10-month open-label study. Of the total 4,158 patients exposed to at least one dose of desvenlafaxine; 1,320 were exposed to desvenlafaxine for 6 months, representing 1058 patient-years of exposure, and 274 were exposed for one year, representing 241 patient-years of exposure.

Adverse Reactions Reported As Reasons For Discontinuation Of Treatment

In the pooled 8-week placebo-controlled studies in patients with MDD, 12% of the 1,834 patients who received desvenlafaxine (50 to 400 mg) discontinued treatment due to an adverse reaction, compared with 3% of the 1,116 placebo-treated patients. At the recommended dose of 50 mg, the discontinuation rate due to an adverse reaction for desvenlafaxine (4.1%) was similar to the rate for placebo (3.8%). For the 100 mg dose of desvenlafaxine the discontinuation rate due to an adverse reaction was 8.7%.

The most common adverse reactions leading to discontinuation in at least 2% and at a rate greater than placebo of the desvenlafaxine treated patients in the short-term studies, up to 8 weeks, were: nausea (4%); dizziness, headache and vomiting (2% each); in the longer-term studies, up to 11 months, the most common was vomiting (2%).

Common Adverse Reactions In Placebo-Controlled MDD Studies

The most commonly observed adverse reactions in desvenlafaxine treated MDD patients in short-term fixed-dose studies (incidence ≥ 5% and at least twice the rate of placebo in the 50 or 100 mg dose groups) were: nausea, dizziness, insomnia, hyperhidrosis, constipation, somnolence, decreased appetite, anxiety, and specific male sexual function disorders.

Table 2 shows the incidence of common adverse reactions that occurred in ≥ 2% of desvenlafaxine treated MDD patients and twice the rate of placebo at any dose in the pooled 8-week, placebo-controlled, fixed dose clinical studies

Table 2: Common Adverse Reactions (≥ 2% in any Fixed-Dose Group and Twice the Rate of Placebo) in Pooled MDD 8-Week Placebo-Controlled Studies

System Organ Class
Preferred Term
Placebo
(n=636)
Percentage of Patients Reporting Reaction
Desvenlafaxine
50 mg
(n=317)
100 mg
(n=424)
200 mg
(n=307)
400 mg
(n=317)
Cardiac disorders
Blood pressure increased 1 1 1 2 2
Gastrointestinal disorders
Nausea 10 22 26 36 41
Dry mouth 9 11 17 21 25
Constipation 4 9 9 10 14
Vomiting 3 3 4 6 9
General disorders and administration site conditions
Fatigue 4 7 7 10 11
Chills 1 1 <1 3 4
Feeling jittery 1 1 2 3 3
Metabolism and nutrition disorders
Decreased appetite 2 5 8 10 10
Nervous system disorders
Dizziness 5 13 10 15 16
Somnolence 4 4 9 12 12
Tremor 2 2 3 9 9
Disturbance in attention <1 <1 1 2 1
Psychiatric disorders
Insomnia 6 9 12 14 15
Anxiety 2 3 5 4 4
Nervousness 1 <1 1 2 2
Abnormal dreams 1 2 3 2 4
Renal and urinary disorders
Urinary hesitation 0 <1 1 2 2
Respiratory, thoracic and mediastinal disorders
Yawning <1 1 1 4 3
Skin and subcutaneous tissue disorders
Hyperhidrosis 4 10 11 18 21
Special Senses
Vision blurred 1 3 4 4 4
Mydriasis <1 2 2 6 6
Vertigo 1 2 1 5 3
Tinnitus 1 2 1 1 2
Dysgeusia 1 1 1 1 2
Vascular disorders
Hot flush <1 1 1 2 2

Sexual Function Adverse Reactions

Table 3 shows the incidence of sexual function adverse reactions that occurred in ≥ 2% of desvenlafaxine treated MDD patients in any fixed-dose group (pooled 8-week, placebo-controlled, fixed and flexible-dose, clinical studies).

Table 3: Sexual Function Adverse Reactions (≥ 2% in Men or Women in any Desvenlafaxine Group) During the On-Therapy Period

  Placebo
(n=239)
Desvenlafaxine
50 mg
(n=108)
100 mg
(n=157)
200 mg
(n=131)
400 mg
(n=154)
Men only
Anorgasmia 0 0 3 5 8
Libido decreased 1 4 5 6 3
Orgasm abnormal 0 0 1 2 3
Ejaculation delayed <1 1 5 7 6
Erectile dysfunction 1 3 6 8 11
Ejaculation disorder 0 0 1 2 5
Ejaculation failure 0 1 0 2 2
Sexual dysfunction 0 1 0 0 2
  Placebo
(n=397)
Desvenlafaxine
50 mg
(n=209)
100 mg
(n=267)
200 mg
(n=176)
400 mg
(n=163)
Women only
Anorgasmia 0 1 1 0 3

Other Adverse Reactions Observed In Clinical Studies

Other infrequent adverse reactions, not described elsewhere in the label, occurring at an incidence of < 2% in MDD patients treated with desvenlafaxine were:

Cardiac disorders - Tachycardia.

General disorders and administration site conditions - Asthenia.

Investigations - Weight increased, liver function test abnormal, blood prolactin increased.

Musculoskeletal and connective tissue disorders - Musculoskeletal stiffness.

Nervous system disorders -Syncope, convulsion, dystonia.

Psychiatric disorders - Depersonalization, bruxism.

Renal and urinary disorders - Urinary retention.

Skin and subcutaneous tissue disorders - Rash, alopecia, photosensitivity reaction, angioedema.

In clinical studies, there were uncommon reports of ischemic cardiac adverse reactions, including myocardial ischemia, myocardial infarction, and coronary occlusion requiring revascularization; these patients had multiple underlying cardiac risk factors. More patients experienced these events during desvenlafaxine treatment as compared to placebo.

Laboratory, ECG And Vital Sign Changes Observed In MDD Clinical Studies

The following changes were observed in placebo-controlled, short-term MDD studies with desvenlafaxine.

Lipids

Elevations in fasting serum total cholesterol, LDL (low density lipoproteins) cholesterol, and triglycerides occurred in the controlled studies. Some of these abnormalities were considered potentially clinically significant.

The percentage of patients who exceeded a predetermined threshold value is shown in Table 4.

Table 4: Incidence (%) of Patients With Lipid Abnormalities of Potential Clinical Significance*

  Placebo Desvenlafaxine
50 mg 100 mg 200 mg 400 mg
Total Cholesterol *(Increase of ≥ 50 mg/dl and an absolute value of ≥ 261 mg/dl) 2 3 4 4 10
LDL Cholesterol *(Increase ≥ 50 mg/dl and an absolute value of ≥ 190 mg/dl) 0 1 0 1 2
Triglycerides, fasting *(Fasting: ≥ 327 mg/dl) 3 2 1 4 6

Proteinuria

Proteinuria, greater than or equal to trace, was observed in the fixed-dose controlled studies (see Table 5). This proteinuria was not associated with increases in BUN or creatinine and was generally transient.

Table 5: Incidence (%) of Patients with Proteinuria in the Fixed-dose Clinical Studies

  Placebo Desvenlafaxine
50 mg 100 mg 200 mg 400 mg
Proteinuria 4 6 8 5 7

Vital Sign Changes

Table 6 summarizes the changes that were observed in placebo-controlled, short-term, pre-marketing studies with desvenlafaxine in patients with MDD (doses 50 to 400 mg).

Table 6: Mean Changes in Vital Signs at Final on Therapy for All Short-term, Fixed-dose Controlled Studies

  Placebo Desvenlafaxine
50 mg 100 mg 200 mg 400 mg
Blood pressure
Supine systolic bp (mm Hg) -1.4 1.2 2.0 2.5 2.1
Supine diastolic bp (mm Hg) -0.6 0.7 0.8 1.8 2.3
Pulse rate
Supine pulse (bpm) -0.3 0.0 1.3 -0.4 1.3 -0.6 0.9 -0.9 4.1 -1.1

Treatment with desvenlafaxine at all doses from 50 mg/day to 400 mg/day in controlled studies was associated with sustained hypertension, defined as treatment-emergent supine diastolic blood pressure (SDBP) ≥90 mm Hg and ≥10 mm Hg above baseline for 3 consecutive on-therapy visits (see Table 7). Analyses of patients in desvenlafaxine short-term controlled studies who met criteria for sustained hypertension revealed a consistent increase in the proportion of patients who developed sustained hypertension. This was seen at all doses with a suggestion of a higher rate at 400 mg/day.

Table 7: Proportion of Patients with Sustained Elevation of Supine Diastolic Blood Pressure

Treatment Group Proportion of Patients with Sustained Hypertension
Placebo 0.5%
Desvenlafaxine 50 mg/day 1.3%
Desvenlafaxine 100 mg/day 0.7%
Desvenlafaxine 200 mg/day 1.1%
Desvenlafaxine 400 mg/day 2.3%

Orthostatic Hypotension

In the short-term, placebo-controlled clinical studies with doses of 50 to 400 mg, systolic orthostatic hypotension (decrease ≥30 mm Hg from supine to standing position) occurred more frequently in patients ≥65 years of age receiving desvenlafaxine (8%, 7/87) versus placebo (2.5%, 1/40), compared to patients <65 years of age receiving desvenlafaxine (0.9%, 18/1,937) versus placebo (0.7%, 8/1,218).

Postmarketing Experience

The following adverse reaction has been identified during post-approval use of desvenlafaxine. 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:

Skin and subcutaneous tissue disorders - Stevens-Johnson syndrome.

Gastrointestinal disorders - Pancreatitis acute.

Cardiovascular System - Takotsubo cardiomyopathy.

Drug Interactions

DRUG INTERACTIONS

Drugs Having Clinically Important Interactions With KHEDEZLA

Table 8: Clinically Important Drug Interactions with KHEDEZLA

Monoamine Oxidase Inhibitors (MAOI)
Clinical Impact The concomitant use of SSRIs and SNRIs including KHEDEZLA with MAOIs increases the risk of serotonin syndrome.
Intervention Concomitant use of KHEDEZLA is contraindicated:
  • With an MAOI intended to treat psychiatric disorders or within 7 days of stopping treatment with KHEDEZLA.
  • Within 14 days of stopping an MAOI intended to treat psychiatric disorders.
  • In a patient who is being treated with linezolid or intravenous methylene blue. [see DOSAGE AND ADMINISTRATION, CONTRAINDICATIONS and WARNINGS AND PRECAUTIONS].
Examples selegiline, tranylcypromine, isocarboxazid, phenelzine, linezolid, methylene blue
Other Serotonergic Drugs
Clinical Impact Concomitant use of KHEDEZLA with other serotonergic drugs increases the risk of serotonin syndrome.
Intervention Monitor for symptoms of serotonin syndrome when KHEDEZLA is used concomitantly with other drugs that may affect the serotonergic neurotransmitter systems. If serotonin syndrome occurs, consider discontinuation of KHEDEZLA and/or concomitant serotonergic drugs [see WARNINGS AND PRECAUTIONS].
Examples Other SNRIs, SSRIs, triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, buspirone, amphetamines, tryptophan, and St. John’s Wort
Drugs that Interfere with Hemostasis
Clinical Impact Concomitant use of KHEDEZLA with an antiplatelet or anticoagulant drug may potentiate the risk of bleeding. This may be due to the effect of KHEDEZLA on the release of serotonin by platelets.
Intervention Closely monitor for bleeding for patients receiving an antiplatelet or anticoagulant drug when KHEDEZLA is initiated or discontinued [see WARNINGS AND PRECAUTIONS].
Examples NSAIDs, aspirin, and warfarin
Drugs that are Primarily Metabolized by CYP2D6
Clinical Impact Concomitant use of KHEDEZLA increases Cmax and AUC of a drug primarily metabolized by CYP2D6 which may increase the risk of toxicity of the CYP2D6 substrate drug [see CLINICAL PHARMACOLOGY].
Intervention Original dose should be taken when co-administered with KHEDEZLA 100 mg or lower. Reduce the dose of these drugs by up to one-half if co-administered with 400 mg of KHEDEZLA.
Examples desipramine, atomoxetine, dextromethorphan, metoprolol, nebivolol, perphenazine, tolterodine

Drugs Having No Clinically Important Interactions With KHEDEZLA

Based on pharmacokinetic studies, no dosage adjustment is required for drugs that are mainly metabolized by CYP3A4 (e.g., midazolam), or for drugs that are metabolized by both CYP2D6 and CYP3A4 (e.g., tamoxifen, aripiprazole), when administered concomitantly with KHEDEZLA [see CLINICAL PHARMACOLOGY].

Alcohol

A clinical study has shown that desvenlafaxine does not increase the impairment of mental and motor skills caused by ethanol. However, as with all CNS-active drugs, patients should be advised to avoid alcohol consumption while taking KHEDEZLA.

Drug-Laboratory Test Interactions

False-positive urine immunoassay screening tests for phencyclidine (PCP) and amphetamine have been reported in patients taking desvenlafaxine. This is due to lack of specificity of the screening tests. False positive test results may be expected for several days following discontinuation of desvenlafaxine therapy. Confirmatory tests, such as gas chromatography/mass spectrometry, will distinguish desvenlafaxine from PCP and amphetamine.

Drug Abuse And Dependence

Controlled Substance

KHEDEZLA is not a controlled substance.

Warnings & Precautions

WARNINGS

Included as part of the PRECAUTIONS section.

PRECAUTIONS

Suicidal Thoughts And Behaviors In Pediatric And Young Adult Patients

Patients with major depressive disorder (MDD), both adult and pediatric, may experience worsening of their depression and/or the emergence of suicidal ideation and behavior (suicidality) or unusual changes in behavior, whether or not they are taking antidepressant medications, and this risk may persist until significant remission occurs. Suicide is a known risk of depression and certain other psychiatric disorders, and these disorders themselves are the strongest predictors of suicide. There has been a long-standing concern, however, that antidepressants may have a role in inducing worsening of depression and the emergence of suicidality in certain patients during the early phases of treatment. Pooled analyses of short-term placebo-controlled studies of antidepressant drugs (SSRIs and others) showed that these drugs increase the risk of suicidal thinking and behavior (suicidality) in children, adolescents, and young adults (ages 18 to 24) with major depressive disorder (MDD) and other psychiatric disorders. Short-term studies did not show an increase in the risk of suicidality with antidepressants compared to placebo in adults beyond age 24; there was a reduction with antidepressants compared to placebo in adults aged 65 and older.

The pooled analyses of placebo-controlled studies in children and adolescents with MDD, obsessive compulsive disorder (OCD), or other psychiatric disorders included a total of 24 short-term studies of 9 antidepressant drugs in over 4,400 patients. The pooled analyses of placebo-controlled studies in adults with MDD or other psychiatric disorders included a total of 295 short-term studies (median duration of 2 months) of 11 antidepressant drugs in over 77,000 patients. There was considerable variation in risk of suicidality among drugs, but a tendency toward an increase in the younger patients for almost all drugs studied. There were differences in absolute risk of suicidality across the different indications, with the highest incidence in MDD. The risk differences (drug vs. placebo), however, were relatively stable within age strata and across indications. These risk differences (drug-placebo difference in the number of cases of suicidality per 1,000 patients treated) are provided in Table 1.

Table 1

Age Range Drug-Placebo Difference in Number of Cases of Suicidality per 1,000 Patients Treated
Increases Compared to Placebo
<18 14 additional cases
18 to 24 5 additional cases
Decreases Compared to Placebo
25 to 64 1 fewer case
≥65 6 fewer cases

No suicides occurred in any of the pediatric studies. There were suicides in the adult studies, but the number was not sufficient to reach any conclusion about drug effect on suicide.

It is unknown whether the suicidality risk extends to longer-term use, i.e., beyond several months. However, there is substantial evidence from placebo-controlled maintenance studies in adults with depression that the use of antidepressants can delay the recurrence of depression.

All patients being treated with antidepressants for any indication should be monitored appropriately and observed closely for clinical worsening, suicidality, and unusual changes in behavior, especially during the initial few months of a course of drug therapy, or at times of dose changes, either increases or decreases.

The following symptoms, anxiety, agitation, panic attacks, insomnia, irritability, hostility, aggressiveness, impulsivity, akathisia (psychomotor restlessness), hypomania, and mania, have been reported in adult and pediatric patients being treated with antidepressants for major depressive disorder as well as for other indications, both psychiatric and nonpsychiatric. Although a causal link between the emergence of such symptoms and either the worsening of depression and/or the emergence of suicidal impulses has not been established, there is concern that such symptoms may represent precursors to emerging suicidality.

Consideration should be given to changing the therapeutic regimen, including possibly discontinuing the medication, in patients whose depression is persistently worse, or who are experiencing emergent suicidality or symptoms that might be precursors to worsening depression or suicidality, especially if these symptoms are severe, abrupt in onset, or were not part of the patient's presenting symptoms.

If the decision has been made to discontinue treatment, medication should be tapered, as rapidly as is feasible, but with recognition that abrupt discontinuation can be associated with certain symptoms [see DOSAGE AND ADMINISTRATION and Discontinuation Syndrome].

Families and caregivers of patients being treated with antidepressants for major depressive disorder or other indications, both psychiatric and nonpsychiatric, should be alerted about the need to monitor patients for the emergence of agitation, irritability, unusual changes in behavior, and the other symptoms described above, as well as the emergence of suicidality, and to report such symptoms immediately to healthcare providers. Such monitoring should include daily observation by families and caregivers.

Prescriptions for KHEDEZLA should be written for the smallest quantity of tablets consistent with good patient management, in order to reduce the risk of overdose.

Screening Patients For Bipolar Disorder

A major depressive episode may be the initial presentation of bipolar disorder. It is generally believed (though not established in controlled studies) that treating such an episode with an antidepressant alone may increase the likelihood of precipitation of a mixed/manic episode in patients at risk for bipolar disorder. Whether any of the symptoms described above represent such a conversion is unknown. However, prior to initiating treatment with an antidepressant, patients with depressive symptoms should be adequately screened to determine if they are at risk for bipolar disorder; such screening should include a detailed psychiatric history, including a family history of suicide, bipolar disorder, and depression. It should be noted that KHEDEZLA is not approved for use in treating bipolar depression.

Serotonin Syndrome

Serotonin-norepinephrine reuptake inhibitors (SNRIs) and selective-serotonin reuptake inhibitors (SSRIs), including KHEDEZLA, can precipitate serotonin syndrome, a potentially life-threatening condition. The risk is increased with concomitant use of other serotonergic drugs (including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan, buspirone, amphetamines, and St. John's Wort), and with drugs that impair metabolism of serotonin i.e., MAOIs [see CONTRAINDICATIONS and DRUG INTERACTIONS]. Serotonin syndrome can also occur when these drugs are used alone.

Serotonin syndrome signs and symptoms may include mental status changes (e.g., agitation, hallucinations, delirium, and coma), autonomic instability (e.g., tachycardia, labile blood pressure, dizziness, diaphoresis, flushing, hyperthermia), neuromuscular symptoms (e.g., tremor, rigidity, myoclonus, hyperreflexia, incoordination), seizures, and gastrointestinal symptoms (e.g., nausea, vomiting, diarrhea).

The concomitant use of KHEDEZLA with MAOIs is contraindicated. In addition, do not initiate KHEDEZLA in a patient being treated with MAOIs such as linezolid or intravenous methylene blue. All reports with methylene blue that provided information on the route of administration involved intravenous administration in the dose range of 1 mg/kg to 8 mg/kg. No reports involved the administration of methylene blue by other routes (such as oral tablets or local tissue injection) or at lower doses. If it is necessary to initiate treatment with an MAOI such as linezolid or intravenous methylene blue in a patient taking KHEDEZLA, discontinue KHEDEZLA before initiating treatment with the MAOI [see CONTRAINDICATIONS and DRUG INTERACTIONS].

Monitor all patients taking KHEDEZLA for the emergence of serotonin syndrome. Discontinue treatment with KHEDEZLA and any concomitant serotonergic agents immediately if the above symptoms occur, and initiate supportive symptomatic treatment. If concomitant use of KHEDEZLA with other serotonergic drugs is clinically warranted, inform patients of the increased risk for serotonin syndrome and monitor for symptoms.

Elevated Blood Pressure

Patients receiving KHEDEZLA should have regular monitoring of blood pressure since increases in blood pressure were observed in clinical studies [see ADVERSE REACTIONS]. Pre-existing hypertension should be controlled before initiating treatment with desvenlafaxine. Caution should be exercised in treating patients with pre-existing hypertension, cardiovascular, or cerebrovascular conditions that might be compromised by increases in blood pressure. Cases of elevated blood pressure requiring immediate treatment have been reported with desvenlafaxine.

Sustained blood pressure increases could have adverse consequences. For patients who experience a sustained increase in blood pressure while receiving KHEDEZLA, either dose reduction or discontinuation should be considered [see ADVERSE REACTIONS].

Increased Risk Of Bleeding

Drugs that interfere with serotonin reuptake inhibition, including KHEDEZLA, may increase the risk of bleeding events. Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs, warfarin, and other anticoagulants may add to this risk. Case reports and epidemiological studies (case-control and cohort design) have demonstrated an association between use of drugs that interfere with serotonin reuptake and the occurrence of gastrointestinal bleeding. Bleeding events related to SSRIs and SNRIs have ranged from ecchymosis, hematoma, epistaxis, and petechiae to life-threatening hemorrhages. Inform patients about the risk of bleeding associated with the concomitant use of KHEDEZLA and antiplatelet agents or anticoagulants. For patients taking warfarin, carefully monitor coagulation indices when initiating, titrating, or discontinuing KHEDEZLA.

Angle Closure Glaucoma

The pupillary dilation that occurs following use of many antidepressant drugs including KHEDEZLA may trigger an angle closure attack in a patient with anatomically narrow angles who does not have a patent iridectomy. Avoid use of antidepressants, including KHEDEZLA, in patients with untreated anatomically narrow angles.

Activation Of Mania/Hypomania

During all MDD phase 2 and phase 3 studies, mania was reported for approximately 0.02% of patients treated with desvenlafaxine. Activation of mania/hypomania has also been reported in a small proportion of patients with major affective disorder who were treated with other marketed antidepressants. As with all antidepressants, KHEDEZLA should be used cautiously in patients with a history or family history of mania or hypomania.

Discontinuation Syndrome

Adverse reactions after discontinuation of serotonergic antidepressants, particularly after abrupt discontinuation, include: nausea, sweating, dysphoric mood, irritability, agitation, dizziness, sensory disturbances (e.g., paresthesia, such as electric shock sensations), tremor, anxiety, confusion, headache, lethargy, emotional lability, insomnia, hypomania, tinnitus, and seizures. A gradual reduction in dosage rather than abrupt cessation is recommended whenever possible [see DOSAGE AND ADMINISTRATION and ADVERSE REACTIONS].

Seizure

Cases of seizure have been reported in pre-marketing clinical studies with desvenlafaxine. Desvenlafaxine has not been systematically evaluated in patients with a seizure disorder. Patients with a history of seizures were excluded from pre-marketing clinical studies. KHEDEZLA should be prescribed with caution in patients with a seizure disorder.

Hyponatremia

Hyponatremia may occur as a result of treatment with SSRIs and SNRIs, including KHEDEZLA. In many cases, this hyponatremia appears to be the result of the syndrome of inappropriate antidiuretic hormone secretion (SIADH). Cases with serum sodium lower than 110 mmol/L have been reported. Elderly patients may be at greater risk of developing hyponatremia with SSRIs and SNRIs. Also, patients taking diuretics or who are otherwise volume depleted can be at greater risk [see Use In Specific Populations  and CLINICAL PHARMACOLOGY].

Discontinuation of KHEDEZLA should be considered in patients with symptomatic hyponatremia and appropriate medical intervention should be instituted.

Signs and symptoms of hyponatremia include headache, difficulty concentrating, memory impairment, confusion, weakness, and unsteadiness, which can lead to falls. Signs and symptoms associated with more severe and/or acute cases have included hallucination, syncope, seizure, coma, respiratory arrest, and death.

Interstitial Lung Disease And Eosinophilic Pneumonia

Interstitial lung disease and eosinophilic pneumonia associated with venlafaxine (the parent drug of desvenlafaxine) therapy have been rarely reported. The possibility of these adverse events should be considered in patients treated with KHEDEZLA who present with progressive dyspnea, cough, or chest discomfort. Such patients should undergo a prompt medical evaluation, and discontinuation of KHEDEZLA should be considered.

Patient Counseling Information

Advise the patient to read the FDA-approved patient labeling (Medication Guide).

Suicidal Thoughts And Behaviors

Advise patients and caregivers to look for the emergence of suicidality, especially early during treatment and when the dose is adjusted up or down, and instruct them to report such symptoms to the healthcare provider [see BOXED WARNING and WARNINGS AND PRECAUTIONS].

Concomitant Medication

Advise patients taking KHEDEZLA not to use concomitantly other products containing desvenlafaxine or venlafaxine. Healthcare professionals should instruct patients not to take KHEDEZLA with an MAOI or within 14 days of stopping an MAOI and to allow 7 days after stopping KHEDEZLA before starting an MAOI [see CONTRAINDICATIONS].

Serotonin Syndrome

Caution patients about the risk of serotonin syndrome, particularly with the concomitant use of KHEDEZLA with other serotonergic agents (including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, amphetamines, tryptophan, buspirone, and St. John's Wort supplements) [see WARNINGS AND PRECAUTIONS].

Elevated Blood Pressure

Advise patients that they should have regular monitoring of blood pressure when taking KHEDEZLA [see WARNINGS AND PRECAUTIONS].

Increased Risk Of Bleeding

Inform patients about the concomitant use of KHEDEZLA with NSAIDs, aspirin, other antiplatelet drugs, warfarin, or other coagulants because the combined use of has been associated with an increased risk of bleeding. Advise patients to inform their healthcare providers if they are taking or planning to take any prescription or over-the-counter medications that increase the risk of bleeding [see WARNINGS AND PRECAUTIONS].

Activation Of Mania/Hypomania

Advise patients, their families, and caregivers to observe for signs of activation of mania/hypomania [see WARNINGS AND PRECAUTIONS].

Discontinuation

Advise patients not to abruptly stop taking KHEDEZLA without talking first with their healthcare professional. Patients should be aware that discontinuation effects may occur when stopping KHEDEZLA [see WARNINGS AND PRECAUTIONS and ADVERSE REACTIONS].

Switching Patients From Other Antidepressants To KHEDEZLA

Discontinuation symptoms have been reported when switching patients from other antidepressants, including venlafaxine, to desvenlafaxine. Tapering of the initial antidepressant may be necessary to minimize discontinuation symptoms.

Interference With Cognitive And Motor Performance

Caution patients about operating hazardous machinery, including automobiles, until they are reasonably certain that KHEDEZLA therapy does not adversely affect their ability to engage in such activities.

Alcohol

Advise patients to avoid alcohol while taking KHEDEZLA [see DRUG INTERACTIONS].

Allergic Reactions

Advise patients to notify their physician if they develop allergic phenomena such as rash, hives, swelling, or difficulty breathing.

Pregnancy

Advise patients to notify their physician if they become pregnant or intend to become pregnant during therapy. Advise patients that there is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to desvenlafaxine during pregnancy [see Use In Specific Populations].

Residual Inert Matrix Tablet

Patients receiving KHEDEZLA may notice an inert matrix tablet passing in the stool or via colostomy. Patients should be informed that the active medication has already been absorbed by the time the patient sees the inert matrix tablet.

Nonclinical Toxicology

Carcinogenesis, Mutagenesis, Impairment Of Fertility

Carcinogenesis

Desvenlafaxine succinate administered by oral gavage to mice and rats for 2 years did not increase the incidence of tumors in either study.

Mice received desvenlafaxine succinate at dosages up to 500/300 mg/kg/day (dosage lowered after 45 weeks of dosing).  The AUC exposure at 300 mg/kg/day dose is estimated at 10-times the AUC exposure at an adult human dose of 100 mg per day.

Rats received desvenlafaxine succinate at dosages up to 300 mg/kg/day (males) or 500 mg/kg/day (females). The AUC exposure at the highest dose is estimated at 11 (males) or 26 (females) times the AUC exposure at an adult human dose of 100 mg per day.

Mutagenesis

Desvenlafaxine was not mutagenic in the in vitro bacterial mutation assay (Ames test) and was not clastogenic in an in vitro chromosome aberration assay in cultured CHO cells, an in vivo mouse micronucleus assay, or an in vivo chromosome aberration assay in rats. Additionally, desvenlafaxine was not genotoxic in the in vitro CHO mammalian cell forward mutation assay and was negative in the in vitro BALB/c-3T3 mouse embryo cell transformation assay.

Impairment Of Fertility

When desvenlafaxine succinate was administered orally to male and female rats, fertility was reduced at the high dose of 300 mg/kg/day, which is 10 (males) and 19 (females) times the AUC exposure at an adult human dose of 100 mg per day. There was no effect on fertility at 100 mg/kg/day, which is 3 (males) or 5 (females) times the AUC exposure at an adult human dose of 100 mg per day. These studies did not address reversibility of the effect on fertility. The relevance of these findings to humans is not known.

Use In Specific Populations

Pregnancy

Pregnancy Exposure Registry

There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to antidepressants during pregnancy. Healthcare providers are encouraged to register patients by calling the National Pregnancy Registry for Antidepressants at 1-844-405-6185.

Risk summary

There are no published studies on KHEDEZLA in pregnant women; however published epidemiologic studies of pregnant women exposed to venlafaxine, the parent compound, have not reported a clear association with adverse developmental outcomes (see Data). There are risks associated with untreated depression in pregnancy and with exposure to SNRIs and SSRIs, including KHEDEZLA, during pregnancy (see Clinical Considerations).

In reproductive developmental studies in rats and rabbits treated with desvenlafaxine succinate, there was no evidence of teratogenicity at a plasma exposure (AUC) that is up to 19-times (rats), and 0.5-times (rabbits) the exposure at an adult human dose of 100 mg per day. However, fetotoxicity and pup deaths were observed in rats at 4.5-times the AUC exposure observed with an adult human dose of 100 mg per day.

The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively.

Clinical Considerations

Disease-Associated Maternal And/Or Embryo/Fetal Risk

A prospective longitudinal study of 201 women with a history of major depression who were euthymic at the beginning of pregnancy, showed that women who discontinued antidepressant medication during pregnancy were more likely to experience a relapse of major depression than women who continued antidepressant medication.

Maternal Adverse Reactions

Exposure to SNRIs in mid to late pregnancy may increase the risk for preeclampsia, and exposure to SNRIs near delivery may increase the risk for postpartum hemorrhage.

Fetal/Neonatal Adverse Reactions

Exposure to SNRIs or SSRIs in late pregnancy may lead to an increased risk for neonatal complications requiring prolonged hospitalization, respiratory support, and tube feeding. Monitor neonates who were exposed to KHEDEZLA in the third trimester of pregnancy for drug discontinuation syndrome (see Data).

Data

Human Data

Published epidemiological studies of pregnant women exposed to the parent compound venlafaxine have not reported a clear association with major birth defects or miscarriage. Methodological limitations of these observational studies include possible exposure and outcome misclassification, lack of adequate controls, adjustment for confounders, and confirmatory studies; therefore, these studies cannot establish or exclude any drug-associated risk during pregnancy.

Retrospective cohort studies based on claims data have shown an association between venlafaxine use and preeclampsia, compared to depressed women who did not take an antidepressant during pregnancy. One study that assessed venlafaxine exposure in the second trimester or first half of the third trimester and preeclampsia showed an increased risk compared to unexposed depressed women (adjusted (adj) RR 1.57, 95% CI 1.29-1.91). Preeclampsia was observed at venlafaxine doses equal to or greater than 75 mg per day and a duration of treatment >30 days. Another study that assessed venlafaxine exposure in gestational weeks 10-20 and preeclampsia showed an increased risk at doses equal to or greater than 150 mg per day. Available data are limited by possible outcome misclassification and possible confounding due to depression severity and other confounders.

Retrospective cohort studies based on claims data have suggested an association between venlafaxine use near the time of delivery or through delivery and postpartum hemorrhage. One study showed an increased risk for postpartum hemorrhage when venlafaxine exposure occurred through delivery, compared to unexposed depressed women (adj RR 2.24 (95% CI 1.69-2.97). There was no increased risk in women who were exposed to venlafaxine earlier in pregnancy. Limitations of this study include possible confounding due to depression severity and other confounders. Another study showed an increased risk for postpartum hemorrhage when SNRI exposure occurred for at least 15 days in the last month of pregnancy or through delivery, compared to unexposed women (adj RR 1.64-1.76). The results of this study may be confounded by the effects of depression.

Neonates exposed to SNRIs or SSRIs, late in the third trimester have developed complications requiring prolonged hospitalization, respiratory support, and tube feeding. Such complications can arise immediately upon delivery. Reported clinical findings have included respiratory distress, cyanosis, apnea, seizures, temperature instability, feeding difficulty, vomiting, hypoglycemia, hypotonia, hypertonia, hyperreflexia, tremor, jitteriness, irritability, and constant crying. These features are consistent with either a direct toxic effect of SSRIs and SNRIs or, possibly, a drug discontinuation syndrome. It should be noted that, in some cases, the clinical picture is consistent with serotonin syndrome [see WARNINGS AND PRECAUTIONS].

Animal Data

When desvenlafaxine succinate was administered orally to pregnant rats and rabbits during the period of organogenesis at doses up to 300 mg/kg/day and 75 mg/kg/day, respectively, no teratogenic effects were observed. These doses were associated with a plasma exposure (AUC) 19-times (rats) and 0.5-times (rabbits) the AUC exposure at an adult human dose of 100 mg per day. However, fetal weights were decreased and skeletal ossification was delayed in rats in association with maternal toxicity at the highest dose, with an AUC exposure at the no-effect dose that is 4.5-times the AUC exposure at an adult human dose of 100 mg per day.

When desvenlafaxine succinate was administered orally to pregnant rats throughout gestation and lactation, there was a decrease in pup weights and an increase in pup deaths during the first four days of lactation at the highest dose of 300 mg/kg/day. The cause of these deaths is not known. The AUC exposure at the no-effect dose for rat pup mortality was 4.5-times the AUC exposure at an adult human dose of 100 mg per day. Post-weaning growth and reproductive performance of the progeny were not affected by maternal treatment with desvenlafaxine succinate at exposures 19-times the AUC exposure at an adult human dose of 100 mg per day.

Lactation

Risk Summary

Available limited data from published literature show low levels of desvenlafaxine in human milk, and have not shown adverse reactions in breastfed infants (see Data). There are no data on the effects of desvenlafaxine on milk production.

The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for KHEDEZLA and any potential adverse effects on the breastfed child from KHEDEZLA or from the underlying maternal condition.

Data

A lactation study was conducted in 10 breastfeeding women (at a mean of 4.3 months post-partum) who were being treated with a 50-150 mg daily dose of desvenlafaxine for postpartum depression. Sampling was performed at steady state (up to 8 samples) over a 24 hour dosing period, and included foremilk and hindmilk. The mean relative infant dose was calculated to be 6.8% (range of 5.5-8.1%). No adverse reactions were seen in the infants.

Pediatric Use

The safety and effectiveness of KHEDEZLA have not been established in pediatric patients for the treatment of MDD.

Antidepressants, such as KHEDEZLA, increase the risk of suicidal thoughts and behaviors in pediatric patients [see BOXED WARNING and WARNINGS AND PRECAUTIONS].

Additional information describing clinical studies in which efficacy was not demonstrated in pediatric patients is approved for Wyeth Pharmaceuticals Inc., a subsidiary of Pfizer Inc.’s Pristiq® (desvenlafaxine) Extended-Release Tablets. However, due to Wyeth Pharmaceuticals Inc., a subsidiary of Pfizer Inc.’s marketing exclusivity rights, this product is not labeled with that pediatric information.

Juvenile Animal Studies

In a juvenile animal study, male and female rats were treated with desvenlafaxine (75, 225 and 675 mg/kg/day) starting on postnatal day (PND) 22 through 112. Behavioral deficits (longer time immobile in a motor activity test, longer time swimming in a straight channel test, and lack of habituation in an acoustic startle test) were observed in males and females but were reversed after a recovery period. A No Adverse Effect Level (NOAEL) was not identified for these deficits. The Low Adverse Effect Level (LOAEL) was 75 mg/kg/day which was associated with plasma exposure (AUC) twice the levels measured with a pediatric dose of 100 mg per day.

In a second juvenile animal study, male and female rats were administered desvenlafaxine (75, 225 or 675 mg/kg/day) for 8 to 9 weeks starting on PND 22 and were mated with naïve counterparts. Delays in sexual maturation and decreased fertility, number of implantation sites and total live embryos were observed in treated females at all doses. The LOAEL for these findings is 75 mg/kg/day which was associated with an AUC twice the levels measured with a pediatric dose of 100 mg per day. These findings were reversed at the end of a 4-week recovery period. The relevance of these findings to humans is not known.

Geriatric Use

Of the 4,158 patients in clinical studies with desvenlafaxine, 6% were 65 years of age or older. No overall differences in safety or efficacy were observed between these patients and younger patients; however, in the short-term placebo-controlled studies, there was a higher incidence of systolic orthostatic hypotension in patients ≥65 years of age compared to patients <65 years of age treated with desvenlafaxine [see ADVERSE REACTIONS]. For elderly patients, possible reduced renal clearance of KHEDEZLA should be considered when determining dose [see DOSAGE AND ADMINISTRATION and CLINICAL PHARMACOLOGY].

SSRIs and SNRIs, including desvenlafaxine, have been associated with cases of clinically significant hyponatremia in elderly patients, who may be at greater risk for this adverse event [see WARNINGS AND PRECAUTIONS].

Renal Impairment

Adjust the maximum recommended dosage in patients with moderate or severe renal impairment (ClCr 15 to 50 mL/min, C-G), or end-stage renal disease (ClCr < 15 mL/min, C-G) [see DOSAGE AND ADMINISTRATION and CLINICAL PHARMACOLOGY].

Hepatic Impairment

Adjust the maximum recommended dosage in patients with moderate to severe hepatic impairment (Child-Pugh score 7 to 15) [see DOSAGE AND ADMINISTRATION and CLINICAL PHARMACOLOGY].

Overdosage

OVERDOSE

Human Experience With Overdosage

There is limited clinical trial experience with desvenlafaxine succinate overdosage in humans. However, desvenlafaxine is the major active metabolite of venlafaxine. Overdose experience reported with venlafaxine (the parent drug of desvenlafaxine) is presented below; the identical information can be found in the Overdosage section of the venlafaxine package insert.

In postmarketing experience, overdose with venlafaxine (the parent drug of desvenlafaxine) has occurred predominantly in combination with alcohol and/or other drugs. The most commonly reported events in overdosage include tachycardia, changes in level of consciousness (ranging from somnolence to coma), mydriasis, seizures, and vomiting. Electrocardiogram changes (e.g., prolongation of QT interval, bundle branch block, QRS prolongation), sinus and ventricular tachycardia, bradycardia, hypotension, rhabdomyolysis, vertigo, liver necrosis, serotonin syndrome, and death have been reported.

Published retrospective studies report that venlafaxine overdosage may be associated with an increased risk of fatal outcomes compared to that observed with SSRI antidepressant products, but lower than that for tricyclic antidepressants. Epidemiological studies have shown that venlafaxine-treated patients have a higher pre-existing burden of suicide risk factors than SSRI-treated patients. The extent to which the finding of an increased risk of fatal outcomes can be attributed to the toxicity of venlafaxine in overdosage, as opposed to some characteristic(s) of venlafaxine-treated patients, is not clear.

Management Of Overdosage

No specific antidotes for KHEDEZLA are known. In managing over dosage, consider the possibility of multiple drug involvement. In case of overdose, call Poison Control Center at 1-800-222-1222 for latest recommendations.

Contraindications

CONTRAINDICATIONS

  • Hypersensitivity to desvenlafaxine succinate, venlafaxine hydrochloride or to any excipients in the KHEDEZLA Extended-release Tablets formulation. Angioedema has been reported in patients treated with desvenlafaxine [see ADVERSE REACTIONS].
  • The use of MAOIs intended to treat psychiatric disorders with KHEDEZLA or within 7 days of stopping treatment with KHEDEZLA is contraindicated because of an increased risk of serotonin syndrome. The use of KHEDEZLA within 14 days of stopping an MAOI intended to treat psychiatric disorders is also contraindicated [see DOSAGE AND ADMINISTRATION and WARNINGS AND PRECAUTIONS].
  • Starting KHEDEZLA in a patient who is being treated with MAOIs such as linezolid or intravenous methylene blue is also contraindicated because of an increased risk of serotonin syndrome [see DOSAGE AND ADMINISTRATION and WARNINGS AND PRECAUTIONS].
Clinical Pharmacology

INDICATIONS

KHEDEZLA is indicated for the treatment of adults with major depressive disorder (MDD) [see Clinical Studies].

DOSAGE AND ADMINISTRATION

General Instructions For Use

The recommended dose for KHEDEZLA is 50 mg once daily, with or without food. The 50 mg dose is both a starting dose and the therapeutic dose. KHEDEZLA should be taken at approximately the same time each day. Tablets must be swallowed whole with fluid and not divided, crushed, chewed, or dissolved.

In clinical studies, doses of 50 mg to 400 mg per day were shown to be effective, although no additional benefit was demonstrated at doses greater than 50 mg per day and adverse reactions and discontinuations were more frequent at higher doses.

When discontinuing therapy, gradual dose reduction is recommended whenever possible to minimize discontinuation symptoms [see Discontinuing KHEDEZLA and WARNINGS AND PRECAUTIONS].

Dosage Recommendations For Patients With Renal Impairment

The maximum recommended dose in patients with moderate renal impairment (24-hr creatinine clearance [ClCr] = 30 to 50 mL/min, Cockcroft-Gault [C-G]) is 50 mg per day. The maximum recommended dose in patients with severe renal impairment (24-hr ClCr less than 30 mL/min, C-G) or end-stage renal disease (ESRD) is 50 mg every other day. Supplemental doses should not be given to patients after dialysis [see Use In Specific Populations and CLINICAL PHARMACOLOGY].

Dosage Recommendations For Patients With Hepatic Impairment

The recommended dose in patients with moderate to severe hepatic impairment (Child-Pugh score 7 to 15) is 50 mg per day. Dose escalation above 100 mg per day is not recommended [see Use In Specific Populations and CLINICAL PHARMACOLOGY].

Maintenance/Continuation/Extended Treatment

It is generally agreed that acute episodes of major depressive disorder require several months or longer of sustained pharmacologic therapy. Patients should be periodically reassessed to determine the need for continued treatment.

Discontinuing KHEDEZLA

Adverse reactions may occur upon discontinuation of KHEDEZLA [see WARNINGS AND PRECAUTIONS]. Gradually reduce the dosage rather than stopping KHEDEZLA abruptly whenever possible.

Switching Patients From Other Antidepressants To KHEDEZLA

Discontinuation symptoms have been reported when switching patients from other antidepressants, including venlafaxine, to desvenlafaxine. Tapering of the initial antidepressant may be necessary to minimize discontinuation symptoms.

Switching Patients To Or From A Monoamine Oxidase Inhibitor (MAOI) Intended To Treat Psychiatric Disorders

At least 14 days should elapse between discontinuation of an MAOI intended to treat psychiatric disorders and initiation of therapy with KHEDEZLA. Conversely, at least 7 days should be allowed after stopping KHEDEZLA before starting an MAOI intended to treat psychiatric disorders [see CONTRAINDICATIONS].

Use Of KHEDEZLA With Other MAOIs Such As Linezolid Or Methylene Blue

Do not start KHEDEZLA in a patient who is being treated with linezolid or intravenous methylene blue because there is increased risk of serotonin syndrome. In a patient who requires more urgent treatment of a psychiatric condition, other interventions, including hospitalization, should be considered [see CONTRAINDICATIONS].

In some cases, a patient already receiving KHEDEZLA therapy may require urgent treatment with linezolid or intravenous methylene blue. If acceptable alternatives to linezolid or intravenous methylene blue treatment are not available and the potential benefits of linezolid or intravenous methylene blue treatment are judged to outweigh the risks of serotonin syndrome in a particular patient, KHEDEZLA should be stopped promptly, and linezolid or intravenous methylene blue can be administered. The patient should be monitored for symptoms of serotonin syndrome for 7 days or until 24 hours after the last dose of linezolid or intravenous methylene blue, whichever comes first. Therapy with KHEDEZLA may be resumed 24 hours after the last dose of linezolid or intravenous methylene blue [see WARNINGS AND PRECAUTIONS].

The risk of administering methylene blue by non-intravenous routes (such as oral tablets or by local injection) or in intravenous doses much lower than 1 mg/kg with KHEDEZLA is unclear. The clinician should, nevertheless, be aware of the possibility of emergent symptoms of serotonin syndrome with such use [see WARNINGS AND PRECAUTIONS].

HOW SUPPLIED

Dosage Forms And Strengths

KHEDEZLA (desvenlafaxine) Extended-release Tablets are available as 50 and 100 mg tablets.

  • 50 mg, pink round tablet debossed with “OS” on one side and “231” on the other side.
  • 100 mg, brown round tablet debossed with “OS” on one side and “232” on the other side.

Storage And Handling

KHEDEZLA (desvenlafaxine) Extended-release Tablets are available as follows:

50 mg, pink, round tablet debossed with “OS” on one side and “231” on the other

NDC 65224-880-31, bottle of 30 tablets in unit-of-use package
NDC
65224-880-90, bottle of 90 tablets in unit-of-use package

100 mg, brown, round tablet debossed with “OS” on one side and “232” on the other

NDC 65224-890-31, bottle of 30 tablets in unit-of-use package
NDC 65224-890-90, bottle of 90 tablets in unit-of-use package

Store at 20° to 25°C (68° to 77°F); excursions permitted to 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature].

Each 50 mg or 100 mg KHEDEZLA Extended-release Tablet contains 50 or 100 mg of desvenlafaxine, respectively.

Manufactured for: Osmotica Pharmaceutical US LLC, Marietta, GA 30062. By: Alcami, 1726 North 23rd Street, Wilmington, NC 28405. Distributed by:, Pernix Therapeutics, LLC, Morristown, NJ 07960. Revised: Jan 2019

Medication Guide

PATIENT INFORMATION

KHEDEZLA

(key-DEZ-luh)
(desvenlafaxine) Extended-release Tablets

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

KHEDEZLA can cause serious side effects, including:

  • Increased risk of suicidal thoughts or actions in some children and young adults within the first few months of treatment. KHEDEZLA is not for use in children.
  • Depression or other serious mental illnesses are the most important causes of suicidal thoughts or actions.

How can I watch for and try to prevent suicidal thoughts and actions?

  • Pay close attention to any changes, especially sudden changes, in mood, behaviors, thoughts, or feelings.This is very important when an antidepressantmedicine is started or when the dose is changed.
  • Call the healthcare provider right away to report new or sudden changes in mood, behavior, thoughts, or feelings.
  • Keep all follow-up visits with the healthcare provider as scheduled. Call the healthcare provider between visits as needed, especially if you have concerns about symptoms.

Call your healthcare provider right away if you have any of the following symptoms, especially if they are new, worse, or worry you:

  • thoughts about suicide or dying
  • trouble sleeping (insomnia)
  • attempts to commit suicide
  • new or worse irritability
  • new or worse depression
  • acting aggressive, being angry, or violent
  • new or worse anxiety
  • acting on dangerous impulses
  • feeling very agitated or restless
  • an extreme increase in activity and talking (mania)
  • panic attacks
  • other unusual changes in behavior or mood

What is KHEDEZLA?

  • KHEDEZLA is a prescription medicine used to treat adults with a certain type of depression called major depressive disorder (MDD). KHEDEZLA belongs to a class of medicines known as serotonin and norepinephrine reuptake inhibitors (SNRIs).

Do not take KHEDEZLA if you:

  • are allergic to desvenlafaxine succinate, venlafaxine hydrochloride, or any of the ingredients in KHEDEZLA. See the end of this Medication Guide for a complete list of ingredients in KHEDEZLA.
  • take a monoamine oxidase inhibitor (MAOI)
  • have stopped taking an MAOI in the last 14 days. Ask your healthcare provider or pharmacist if you are not sure if you take an MAOI.
  • are being treated with the antibiotic linezolid or the intravenous methylene blue

Do not start taking anMAOI for at least 7 days after you stop treatment with KHEDEZLA.

Before taking KHEDEZLA tell your healthcare provider about all your medical conditions, including if you:

  • have high blood pressure
  • have heart problems
  • have cerebrovascular problems or had a stroke
  • have or had bleeding problems
  • have, or have a family history of, bipolar disorder, mania or hypomania
  • have high cholesterol or high triglycerides
  • have or had depression, suicidal thoughts or behavior
  • have kidney or liver problems
  • have or had seizures or convulsions
  • have low sodium levels in your blood
  • are pregnant or plan to become pregnant. Talk to your healthcare provider about the risk to your unborn baby if you take KHEDEZLA during pregnancy.
    • Tell your healthcare provider if you become pregnant or think you are pregnant during treatment with KHEDEZLA.
    • If you become pregnant during treatment with KHEDEZLA, talk to your healthcare provider about registering with the National Pregnancy Registry for Antidepressants. You can register by calling 1-844-405-6185.
  • are breastfeeding or plan to breastfeed. KHEDEZLA can pass into your breast milk. Talk to your healthcare provider about the best way to feed your baby during treatment with KHEDEZLA.

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

KHEDEZLA and other medicines may affect each other causing possible serious side effects. KHEDEZLA may affect the way other medicines work and other medicines may affect the way KHEDEZLA works.

Especially tell your healthcare provider if you take:

  • other MAOIs
  • medicines to treat migraine headaches known as triptans
  • tricyclic antidepressants
  • fentanyl
  • lithium
  • tramadol
  • tryptophan
  • buspirone
  • amphetamines
  • St. John'sWort
  • other medicines containing desvenlafaxine or venlafaxine
  • medicines that can affect blood clotting such as aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), warfarin
  • medicines used to treat mood, anxiety, psychotic, or thought disorders, including selective serotonin reuptake inhibitors (SSRIs) and serotonin norepinephrine reuptake inhibitors (SNRIs)

Ask your healthcare provider if you are not sure if you are taking any of these medicines. Your healthcare provider can tell you if it is safe to take KHEDEZLA with your other medicines.

Do not start or stop any other medicines during treatment with KHEDEZLA without talking to your healthcare provider first. Stopping KHEDEZLA suddenlymay cause you to have serious side effects. See, “What are the possible side effects of KHEDEZLA?”

Know the medicines you take. Keep a list of them to show to your healthcare providers when you get a new medicine.

How should I take KHEDEZLA?

  • Take KHEDEZLA exactly as your healthcare provider tells you to.
  • Take KHEDEZLA one time a day at about the same time each day.
  • KHEDEZLA may be taken either with or without food.
  • SwallowKHEDEZLA tablets whole, with fluid. Do not divide, crush, chew, or dissolve KHEDEZLA tablets.
  • When you take KHEDEZLA, you may see something in your stool that looks like a tablet. This is the empty shell from the tablet after the medicine has been absorbed by your body.
  • If over-exposure occurs, call your Poison Control Center at 1-800-222-1222 or go to the nearest hospital emergency room right away.

What should I avoid while taking KHEDEZLA?

  • Do not drive a car or operate heavy machinery until you know how KHEDEZLA affects you.
  • You should not drink alcohol while taking KHEDEZLA.

What are the possible side effects of KHEDEZLA?

KHEDEZLA can cause serious side effects, including:

  • See, What is the most important information I should know about KHEDEZLA?”
  • Serotonin syndrome. A potentially life-threatening problem called serotonin syndrome can happen when you take KHEDEZLA with certain other medicines. See, “Who should not take KHEDEZLA?” Call your healthcare provider or go to the nearest hospital emergency room right away if you have any of the following signs and symptoms of serotonin syndrome:
    • agitation
    • seeing or hearing things that are not real (hallucinations)
    • confusion
    • coma
    • fast heart beat
    • changes in blood pressure
    • dizziness
    • sweating
    • flushing
    • high body temperature (hyperthermia)
    • tremors, stiff muscles, or muscle twitching
    • loss of coordination
    • seizures
    • nausea, vomiting, diarrhea
  • New or worsened high blood pressure (hypertension). Your healthcare provider should check your blood pressure before and during treatment with KHEDEZLA. If you have high blood pressure, it should be controlled before you start treatment with KHEDEZLA.
  • Increased chance of bleeding or bruising. Taking KHEDEZLA with aspirin, NSAIDs, or blood thinners may add to this risk. Tell your healthcare provider right away about any unusual bleeding or bruising.
  • Eye problems (angle closure glaucoma). Many antidepressant medicines, including KHEDEZLA, may cause a certain type of eye problem called angle-closure glaucoma. Call your healthcare provider if you have changes in your vision or eye pain.
  • Discontinuation syndrome. Suddenly stopping KHEDEZLA when you take higher doses may cause you to have serious side effects. Your healthcare provider may want to decrease your dose slowly. Symptoms may include:
    • dizziness
    • nausea
    • headache
    • irritability and agitation
    • problems sleeping
    • diarrhea
    • anxiety
    • tiredness
    • abnormal dreams
    • sweating
    • confusion
    • changes in your mood
    • seizures
    • electric shock sensation
    • hypomania
    • ringing in your ears (tinnitus) (paresthesia)
  • Seizures (convulsions).
  • Low sodiumlevels in your blood (hyponatremia). Low sodium levels can happen during treatment with KHEDEZLA. Low sodium levels in your blood may be serious and may cause death. Signs and Symptoms of low sodium levels in your blood may include:
    • headache
    • difficulty concentrating
    • memory changes
    • confusion
    • weakness and unsteadiness on your feet which can lead to falls

In severe or more sudden cases, signs and symptoms include:

    • hallucinations (seeing or hearing things that are not real)
    • fainting
    • seizures
    • coma
  • Lung problems. Some people who have taken the medicine venlafaxine which is the same kind of medicine as the medicine in KHEDEZLA have had lung problems. Symptoms of lung problems include difficulty breathing, cough, or chest discomfort. Tell your healthcare provider right away if you have any of these symptoms.

The most common side effects of KHEDEZLA include:

  • nausea
  • dizziness
  • problems sleeping
  • sweating
  • constipation
  • feeling sleepy
  • decreased appetite
  • anxiety
  • sexual function problems

These are not all the possible side effects of KHEDEZLA.

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

How should I store KHEDEZLA?

  • Store KHEDEZLA at room temperature between 68°F to 77°F (20°C to 25°C).
  • Keep KHEDEZLA and all medicines out of the reach of children.

General Information about the safe and effective use of KHEDEZLA

Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not take KHEDEZLA for a condition for which it was not prescribed. Do not give KHEDEZLA to other people, even if they have the same symptoms that you have. It may harm them. You can ask your pharmacist or healthcare provider for information about KHEDEZLA that is written for healthcare professionals.

What are the ingredients in KHEDEZLA?

Active ingredient: desvenlafaxine

Inactive ingredients:

  • 50 mg tablet: citric acid monohydrate, colloidal silicon dioxide, hypromellose, magnesium stearate, microcrystalline cellulose, talc, and film coating, which consists of iron oxides, polyethylene glycol, polyvinyl alcohol, talc, and titanium dioxide.
  • 100 mg tablet: citric acid monohydrate, colloidal silicon dioxide, hypromellose, magnesium stearate, microcrystalline cellulose, talc, and film coating, which consists of FD&C yellow #6, hypromellose, iron oxides, polyethylene glycol, polyvinyl alcohol, talc, and titanium dioxide.

This Medication Guide has been approved by the U.S. Food and Drug Administration.

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Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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