Imfinzi

Medical Editor: John P. Cunha, DO, FACOEP Last updated on RxList: 11/8/2022
Drug Description

What is Imfinzi and how is it used?

Imfinzi is a prescription medicine used to treat the symptoms of Urothelial Carcinoma, Non-small Cell Lung Cancer and Small Cell Lung Cancer. Imfinzi may be used alone or with other medications.

Imfinzi belongs to a class of drugs called PD-1/PD-L1 Inhibitors.

It is not known if Imfinzi is safe and effective in children.

What are the possible side effects of Imfinzi?

Imfinzi may cause serious side effects including:

  • hives,
  • difficulty breathing,
  • swelling of your face, lips, tongue, or throat,
  • shortness of breath,
  • cough,
  • chest pain,
  • yellowing of the eyes or skin,
  • severe nausea,
  • vomiting,
  • pain on the right side of the stomach,
  • dark urine,
  • ease bruising or bleeding,
  • cold sensitivity,
  • dry skin,
  • unexplained weight gain,
  • diarrhea,
  • blood in the stool,
  • severe stomach pain,
  • rapid or slow heartbeat,
  • leg swelling,
  • excessive sweating,
  • fatigue,
  • increased thirst or appetite,
  • high blood sugar,
  • hair loss,
  • irritability,
  • confusion,  
  • loss of short-term or long-term memory,
  • impaired judgment,
  • constipation,
  • deepening of the voice,
  • low or high blood pressure,
  • frequent urination,
  • little or no urination,
  • blood in the urine,
  • ankle swelling,
  • loss of appetite,
  • headache,  
  • change in balance,
  • severe muscle weakness,
  • muscle pain,
  • chest pain or tightness,
  • irregular heartbeat, and
  • flu-like symptoms,

Get medical help right away, if you have any of the symptoms listed above.

The most common side effects of Imfinzi include:

  • fatigue,
  • fever,
  • chills,
  • sore throat,
  • muscle and bone pain,
  • constipation,
  • decreased appetite,
  • rash,
  • nausea,
  • swelling,
  • painful urination,
  • frequent urination,
  • abdominal pain,
  • blood in the stool,
  • diarrhea,
  • headache,
  • confusion,  
  • shortness of breath, and
  • weakness

Tell the doctor if you have any side effect that bothers you or that does not go away.

These are not all the possible side effects of Imfinzi. For more information, ask your doctor or pharmacist.

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

DESCRIPTION

Durvalumab is a programmed cell death ligand 1 (PD-L1) blocking antibody. Durvalumab is a human immunoglobulin G1 kappa (IgG1κ) monoclonal antibody that is produced by recombinant DNA technology in Chinese Hamster Ovary (CHO) cell suspension culture.

IMFINZI (durvalumab) Injection for intravenous use is a sterile, preservative-free, clear to opalescent, colorless to slightly yellow solution, free from visible particles.

Each 500 mg vial of IMFINZI contains 500 mg of durvalumab in 10 mL solution. Each mL contains durvalumab, 50 mg, L-histidine (2 mg), L-histidine hydrochloride monohydrate (2.7 mg), α,α-trehalose dihydrate (104 mg), Polysorbate 80 (0.2 mg), and Water for Injection, USP.

Each 120 mg vial of IMFINZI contains 120 mg of durvalumab in 2.4 mL solution. Each mL contains durvalumab, 50 mg, L-histidine (2 mg), L-histidine hydrochloride monohydrate (2.7 mg), α,α-trehalose dihydrate (104 mg), Polysorbate 80 (0.2 mg), and Water for Injection, USP.

Indications & Dosage

INDICATIONS

Non-Small Cell Lung Cancer

IMFINZI is indicated for the treatment of adult patients with unresectable Stage III non-small cell lung cancer (NSCLC) whose disease has not progressed following concurrent platinum-based chemotherapy and radiation therapy.

Small Cell Lung Cancer

IMFINZI, in combination with etoposide and either carboplatin or cisplatin, is indicated for the first-line treatment of adult patients with extensive-stage small cell lung cancer (ES-SCLC).

Biliary Tract Cancers

IMFINZI, in combination with gemcitabine and cisplatin, is indicated for the treatment of adult patients with locally advanced or metastatic biliary tract cancer (BTC).

Hepatocellular Carcinoma

IMFINZI in combination with tremelimumab-actl is indicated for the treatment of adult patients with unresectable hepatocellular carcinoma (uHCC).

DOSAGE AND ADMINISTRATION

Recommended Dosage

The recommended dosages for IMFINZI as a single agent and IMFINZI in combination with other therapeutic agents are presented in Table 1.

Administer IMFINZI as an intravenous infusion after dilution as recommended [see DOSAGE AND ADMINISTRATION].

Table 1: Recommended Dosages of IMFINZI

Indication Recommended IMFINZI Dosage Duration of Therapy
Single Agent
Unresectable stage III NSCLC Patients with a body weight of 30 kg and more: 10 mg/kg every 2 weeks or 1,500 mg every 4 weeks Patients with a body weight of less than 30 kg: 10 mg/kg every 2 weeks Until disease progression, unacceptable toxicity, or a maximum of 12 months
Combination with Other Therapeutic Agents
ES-SCLC Patients with a body weight of 30 kg and more: 1,500 mg in combination with chemotherapy* every 3 weeks (21 days) for 4 cycles, followed by 1,500 mg every 4 weeks as a single agent
Patients with a body weight of less than 30 kg: 20 mg/kg in combination with chemotherapy* every 3 weeks (21 days) for 4 cycles, followed by 10 mg/kg every 2 weeks as a single agent
Until disease progression or unacceptable toxicity
BTC Patients with a body weight of 30 kg and more: 1,500 mg in combination with chemotherapy* every 3 weeks (21 days) up to 8 cycles followed by 1,500 mg every 4 weeks as a single agent
Patients with a body weight of less than 30 kg: 20 mg/kg in combination with chemotherapy* every 3 weeks (21 days) up to 8 cycles followed by 20 mg/kg every 4 weeks as a single agent
Until disease progression or until unacceptable toxicity
uHCC Patients with a body weight of 30 kg and more:
  • IMFINZI 1,500 mg following a single dose of tremelimumab-actl$ 300 mg at Day 1 of Cycle 1;
  • Continue IMFINZI 1,500 mg as a single agent every 4 weeks
After Cycle 1 of combination therapy, administer IMFINZI as a single agent every 4 weeks until disease progression or unacceptable toxicity
Patients with a body weight of less than 30 kg:
  • IMFINZI 20 mg/kg following a single dose of tremelimumab-actl* 4 mg/kg at Day 1 of Cycle 1;
  • Continue IMFINZI 20 mg/kg as a single agent every 4 weeks
* Administer IMFINZI prior to chemotherapy on the same day. Refer to the Prescribing Information for the agent administered in combination with IMFINZI for recommended dosage information, as appropriate.
$ Administer tremelimumab-actl prior to IMFINZI on the same day. When tremelimumab-actl is administered in combination with IMFINZI, refer to the Prescribing Information for tremelimumab-actl dosing information.

Dosage Modifications For Adverse Reactions

No dose reduction for IMFINZI is recommended. In general, withhold IMFINZI for severe (Grade 3) immune-mediated adverse reactions. Permanently discontinue IMFINZI for life-threatening (Grade 4) immune-mediated adverse reactions, recurrent severe (Grade 3) immune-mediated reactions that require systemic immunosuppressive treatment, or an inability to reduce corticosteroid dose to 10 mg or less of prednisone or equivalent per day within 12 weeks of initiating corticosteroids.

Dosage modifications for IMFINZI for adverse reactions that require management different from these general guidelines are summarized in Table 2.

Table 2: Recommended Dosage Modifications for Adverse Reactions

Adverse Reaction Severity* Dosage Modification
Immune-Mediated Adverse Reactions [see WARNINGS AND PRECAUTIONS]
Pneumonitis Grade 2 Withhold†
Grade 3 or 4 Permanently discontinue
Colitis Grade 2 Withhold†
Grade 3 Withhold† or permanently discontinue‡
Grade 4 Permanently discontinue
Intestinal perforation Any grade Permanently discontinue
Hepatitis with no tumor involvement of the liver ALT or AST increases to more than 3 and up to 8 times the ULN or total bilirubin increases to more than 1.5 and up to 3 times ULN Withhold†
ALT or AST increases to more than 8 times ULN or total bilirubin increases to more than 3 times the ULN Permanently discontinue
Hepatitis with tumor involvement of the liver§ AST or ALT is more than 1 and up to 3 times ULN at baseline and increases to more than 5 and up to 10 times ULN or AST or ALT is more than 3 and up to 5 times ULN at baseline and increases to more than 8 and up to 10 times ULN Withhold†
AST or ALT increases to more than 10 times ULN or total bilirubin increases to more than 3 times ULN Permanently discontinue
Endocrinopathies Grade 3 or 4 Withhold until clinically stable or permanently discontinue depending on severity
Nephritis with Renal Dysfunction Grade 2 or 3 increased blood creatinine Withhold†
Grade 4 increased blood creatinine Permanently discontinue
Exfoliative Dermatologic Conditions Suspected SJS, TEN, or DRESS Withhold†
Confirmed SJS, TEN, or DRESS Permanently discontinue
Myocarditis Grade 2, 3, or 4 Permanently discontinue
Neurological Toxicities Grade 2 Withhold†
Grade 3 or 4 Permanently discontinue
Other Adverse Reactions
Infusion-related reactions [see WARNINGS AND PRECAUTIONS] Grade 1 or 2 Interrupt or slow the rate of infusion
Grade 3 or 4 Permanently discontinue
ALT = alanine aminotransferase, AST = aspartate aminotransferase, DRESS = Drug Rash with Eosinophilia and Systemic Symptoms, SJS = Stevens Johnson Syndrome, TEN = toxic epidermal necrolysis, ULN = upper limit normal.
* Based on National Cancer Institute Common Terminology Criteria for Adverse Events, version 4.03.
† Resume in patients with complete or partial resolution (Grade 0 to 1) after corticosteroid taper. Permanently discontinue if no complete or partial resolution within 12 weeks of initiating corticosteroids or an inability to reduce corticosteroid dose to 10 mg of prednisone or less per day (or equivalent) within 12 weeks of initiating corticosteroids.
‡ Permanently discontinue IMFINZI for Grade 3 colitis when administered as part of a tremelimumab-actl containing regimen.
§ If AST and ALT are less than or equal to ULN at baseline in patients with liver involvement, withhold or permanently discontinue IMFINZI based on recommendations for hepatitis with no liver involvement.

Preparation And Administration

Preparation
  • Visually inspect drug product for particulate matter and discoloration prior to administration, whenever solution and container permit. Discard the vial if the solution is cloudy, discolored, or visible particles are observed.
  • Do not shake the vial.
  • Withdraw the required volume from the vial(s) of IMFINZI and transfer into an intravenous bag containing 0.9% Sodium Chloride Injection, USP or 5% Dextrose Injection, USP. Mix diluted solution by gentle inversion. Do not shake the solution. The final concentration of the diluted solution should be between 1 mg/mL and 15 mg/mL.
  • Discard partially used or empty vials of IMFINZI.
Storage Of Infusion Solution
  • IMFINZI does not contain a preservative.
  • Administer infusion solution immediately once prepared. If the infusion solution is not administered immediately and needs to be stored, the time from preparation until the completion of the infusion should not exceed:
    • 28 days in a refrigerator at 2°C to 8°C (36°F to 46°F)
    • 8 hours at room temperature up to 25°C (77°F)
  • Do not freeze.
  • Do not shake.
Administration
  • Administer infusion solution intravenously over 60 minutes through an intravenous line containing a sterile, low-protein binding 0.2 or 0.22 micron in-line filter.
  • Do not co-administer other drugs through the same infusion line.
  • When IMFINZI is given in combination with tremelimumab-actl
    • Administer tremelimumab-actl over 60 minutes followed by a 60 minute observation period. Then administer IMFINZI as a separate intravenous infusion over 60 minutes on the same day.
    • Use separate infusion bags and filters for each infusion

HOW SUPPLIED

Dosage Forms And Strengths

Injection: 120 mg/2.4 mL (50 mg/mL) and 500 mg/10 mL (50 mg/mL) clear to opalescent, colorless to slightly yellow solution in a single-dose vial.

Storage And Handling

IMFINZI (durvalumab) Injection is a clear to opalescent, colorless to slightly yellow solution supplied in a carton containing one single-dose vial either as:

500 mg/10 mL (50 mg/mL) (NDC 0310-4611-50)
120 mg/2.4 mL (50 mg/mL) (NDC 0310-4500-12)

Store in a refrigerator at 2°C to 8°C (36°F to 46°F) in original carton to protect from light. Do not freeze. Do not shake.

Manufactured for: AstraZeneca Pharmaceuticals LP, Wilmington, DE 19850. By: AstraZeneca UK Limited, 1 Francis Crick Ave., Cambridge, England CB2 0AA. Revised: Oct 2022

SLIDESHOW

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Side Effects & Drug Interactions

SIDE EFFECTS

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

  • Immune-Mediated Adverse Reactions [see WARNINGS AND PRECAUTIONS].
  • Infusion-Related Reactions [see WARNINGS AND PRECAUTIONS].

Clinical Trials 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.

The data described in the Warnings and Precautions section reflect exposure to IMFINZI in 1889 patients from the PACIFIC study (a randomized, placebo-controlled study that enrolled 475 patients with Stage III NSCLC), Study 1108 (an open-label, single-arm, multicohort study that enrolled 970 patients with advanced solid tumors), and an additional open-label, single-arm trial that enrolled 444 patients with metastatic lung cancer, an indication for which durvalumab is not approved. In these trials, IMFINZI was administered at a dose of 10 mg/kg every 2 weeks. Among the 1889 patients, 38% were exposed for 6 months or more and 18% were exposed for 12 months or more. The data also reflect exposure to IMFINZI in combination with chemotherapy in 265 patients from the CASPIAN study (a randomized, open-label study in patients with ES-SCLC), in 338 patients from the TOPAZ-1 study (a randomized, double-blind study in patients with BTC). In the CASPIAN and TOPAZ-1 studies, IMFINZI was administered at a dose of 1,500 mg every 3 or 4 weeks.

The data described in this section reflect exposure to IMFINZI in patients with Stage III NSCLC enrolled in the PACIFIC study, in patients with ES-SCLC enrolled in the CASPIAN study, in patients with BTC enrolled in the TOPAZ-1 study and in patients with uHCC included in the HIMALAYA study.

Non-Small Cell Lung Cancer

The safety of IMFINZI in patients with Stage III NSCLC who completed concurrent platinum-based chemoradiotherapy within 42 days prior to initiation of study drug was evaluated in the PACIFIC study, a multicenter, randomized, double-blind, placebo-controlled study. A total of 475 patients received IMFINZI 10 mg/kg intravenously every 2 weeks. The study excluded patients who had disease progression following chemoradiation, with active or prior autoimmune disease within 2 years of initiation of the study or with medical conditions that required systemic immunosuppression [see Clinical Studies].

The study population characteristics were: median age of 64 years (range: 23 to 90), 45% age 65 years or older, 70% male, 69% White, 27% Asian, 75% former smoker, 16% current smoker, and 51% had WHO performance status of 1. All patients received definitive radiotherapy as per protocol, of which 92% received a total radiation dose of 54 Gy to 66 Gy. The median duration of exposure to IMFINZI was 10 months (range: 0.2 to 12.6).

IMFINZI was discontinued due to adverse reactions in 15% of patients. The most common adverse reactions leading to IMFINZI discontinuation were pneumonitis or radiation pneumonitis in 6% of patients. Serious adverse reactions occurred in 29% of patients receiving IMFINZI. The most frequent serious adverse reactions reported in at least 2% of patients were pneumonitis or radiation pneumonitis (7%) and pneumonia (6%). Fatal pneumonitis or radiation pneumonitis and fatal pneumonia occurred in < 2% of patients and were similar across arms. The most common adverse reactions (occurring in ≥ 20% of patients) were cough, fatigue, pneumonitis or radiation pneumonitis, upper respiratory tract infections, dyspnea, and rash.

Table 3 summarizes the adverse reactions that occurred in at least 10% of patients treated with IMFINZI.

Table 3: Adverse Reactions Occurring in ≥ 10% of Patients in the PACIFIC Study

Adverse Reaction IMFINZI
N = 475
Placebo
N =234
All Grades (%) Grades 3-4 (%) All Grades (%) Grades 3-4 (%)
Respiratory, Thoracic, and Mediastinal Disorders
Cough/Productive Cough 40 0.6 30 0.4
Pneumonitis*/Radiation Pneumonitis 34 3.4 25 3
Dyspnea† 25 1.5 25 2.6
Gastrointestinal Disorders
Diarrhea 18 0.6 19 1.3
Abdominal pain‡ 10 0.4 6 0.4
Endocrine Disorders
Hypothyroidism§ 12 0.2 1.7 0
Skin and Subcutaneous Tissue Disorders
Rash¶ 23 0.6 12 0
Pruritus# 12 0 6 0
General Disorders
FatigueÞ 34 0.8 32 1.3
Pyrexia 15 0.2 9 0
Infections
Upper respiratory tract infectionsβ 26 0.4 19 0
Pneumoniaà 17 7 12 6
* Includes acute interstitial pneumonitis, interstitial lung disease, pneumonitis, pulmonary fibrosis.
† Includes dyspnea, and exertional dyspnea.
‡ Includes abdominal pain, abdominal pain lower, abdominal pain upper, and flank pain.
§ Includes autoimmune hypothyroidism and hypothyroidism.
¶ Includes rash erythematous, rash generalized, rash macular, rash maculopapular, rash papular, rash pruritic, rash pustular, erythema, eczema, rash, and dermatitis.
# Includes pruritus generalized and pruritus.
Þ Includes asthenia and fatigue.
β Includes laryngitis, nasopharyngitis, peritonsillar abscess, pharyngitis, rhinitis, sinusitis, tonsillitis, tracheobronchitis, and upper respiratory tract infection.
à Includes lung infection, pneumocystis jirovecii pneumonia, pneumonia, pneumonia adenoviral, pneumonia bacterial, pneumonia cytomegaloviral, pneumonia haemophilus, pneumonia klebsiella, pneumonia necrotizing, pneumonia pneumococcal, and pneumonia streptococcal.

Other adverse reactions occurring in less than 10% of patients treated with IMFINZI were dysphonia, dysuria, night sweats, peripheral edema, and increased susceptibility to infections.

Table 4 summarizes the laboratory abnormalities that occurred in at least 20% of patients treated with IMFINZI.

Table 4: Laboratory Abnormalities Worsening from Baseline Occurring in ≥ 20% of Patients in the PACIFIC Study

Laboratory Abnormality IMFINZI Placebo
All Grades* (%)† Grade 3 or 4 (%) All Grades* (%)† Grade 3 or 4 (%)
Chemistry
Hyperglycemia 52 8 51 8
Hypocalcemia 46 0.2 41 0
Increased ALT 39 2.3 22 0.4
Increased AST 36 2.8 21 0.4
Hyponatremia 33 3.6 30 3.1
Hyperkalemia 32 1.1 29 1.8
Increased GGT 24 3.4 22 1.7
Hematology
Lymphopenia 43 17 39 18
* Graded according to NCI CTCAE version 4.0.
† Each test incidence is based on the number of patients who had both baseline and at least one on-study laboratory measurement available: IMFINZI (range: 464 to 470) and placebo (range: 224 to 228).

Small Cell Lung Cancer

The safety of IMFINZI in combination with etoposide and either carboplatin or cisplatin in previously untreated ES-SCLC was evaluated in CASPIAN, a randomized, open-label, multicenter, active-controlled trial. A total of 265 patients received IMFINZI 1,500 mg in combination with chemotherapy every 3 weeks for 4 cycles followed by IMFINZI 1,500 mg every 4 weeks until disease progression or unacceptable toxicity. The trial excluded patients with active or prior autoimmune disease or with medical conditions that required systemic corticosteroids or immunosuppressants [see Clinical Studies]. Among 265 patients receiving IMFINZI, 49% were exposed for 6 months or longer and 19% were exposed for 12 months or longer.

Among 266 patients receiving chemotherapy alone, 57% of the patients received 6 cycles of chemotherapy and 8% of the patients received prophylactic cranial irradiation (PCI) after chemotherapy. IMFINZI was discontinued due to adverse reactions in 7% of the patients receiving IMFINZI plus chemotherapy. These include pneumonitis, hepatotoxicity, neurotoxicity, sepsis, diabetic ketoacidosis and pancytopenia (1 patient each). Serious adverse reactions occurred in 31% of patients receiving IMFINZI plus chemotherapy. The most frequent serious adverse reactions reported in at least 1% of patients were febrile neutropenia (4.5%), pneumonia (2.3%), anemia (1.9%), pancytopenia (1.5%), pneumonitis (1.1%) and COPD (1.1%). Fatal adverse reactions occurred in 4.9% of patients receiving IMFINZI plus chemotherapy. These include pancytopenia, sepsis, septic shock, pulmonary artery thrombosis, pulmonary embolism, and hepatitis (1 patient each) and sudden death (2 patients). The most common adverse reactions (occurring in ≥ 20% of patients) were nausea, fatigue/asthenia and alopecia.

Table 5 summarizes the adverse reactions that occurred in patients treated with IMFINZI plus chemotherapy.

Table 5: Adverse Reactions Occurring in ≥ 10% of Patients in the CASPIAN study

Adverse Reaction IMFINZI with etoposide and either carboplatin or cisplatin
N = 265
Etoposide and either carboplatin or cisplatin
N = 266
All Grades (%) Grade 3-4 (%) All Grades (%) Grade 3-4 (%)
Respiratory, thoracic and mediastinal disorders
Cough/Productive Cough 15 0.8 9 0
Gastrointestinal disorders
Nausea 34 0.4 34 1.9
Constipation 17 0.8 19 0
Vomiting 15 0 17 1.1
Diarrhea 10 1.1 11 1.1
Endocrine disorders
Hyperthyroidism* 10 0 0.4 0
Skin and subcutaneous tissue disorders
Alopecia 31 1.1 34 0.8
Rash† 11 0 6 0
General disorders and administration site conditions
Fatigue/Asthenia 32 3.4 32 2.3
Metabolism and nutrition disorders
Decreased appetite 18 0.8 17 0.8
* Includes hyperthyroidism and Basedow's disease.
† Includes rash erythematous, rash generalized, rash macular, rash maculopapular, rash papular, rash pruritic, rash pustular, erythema, eczema, rash and dermatitis.

Table 6 summarizes the laboratory abnormalities that occurred in at least 20% of patients treated with IMFINZI plus chemotherapy.

Table 6: Laboratory Abnormalities Worsening from Baseline Occurring in ≥ 20%* of Patients in the CASPIAN study

Laboratory Abnormality IMFINZI with Etoposide and either Carboplatin or Cisplatin Etoposide and either Carboplatin or Cisplatin
Grade† 3 or 4 (%)‡ Grade† 3 or 4 (%)‡
Chemistry
Hyponatremia 11 13
Hypomagnesemia 11 6
Hyperglycemia 5 5
Increased Alkaline Phosphatase 4.9 3.5
Increased ALT 4.9 2.7
Increased AST 4.6 1.2
Hypocalcemia 3.5 2.4
Blood creatinine increased 3.4 1.1
Hyperkalemia 1.5 3.1
TSH decreased < LLN§ and ≥ LLN at baseline NA NA
Hematology
Neutropenia 41 48
Lymphopenia 14 13
Anemia 13 22
Thrombocytopenia 12 15
* The frequency cut off is based on any grade change from baseline.
† Graded according to NCI CTCAE version 4.03.
‡ Each test incidence is based on the number of patients who had both baseline and at least one on-study laboratory measurement available: IMFINZI (range: 258 to 263) and chemotherapy (range: 253 to 262) except magnesium IMFINZI + chemotherapy (18) and chemotherapy (16).
§ LLN = lower limit of normal

Biliary Tract Cancer

The safety of IMFINZI in combination with gemcitabine and cisplatin in locally advanced or metastatic BTC was evaluated in TOPAZ-1, a randomized, double-blind, placebo-controlled, multicenter trial. A total of 338 patients received IMFINZI 1,500 mg in combination with gemcitabine and cisplatin every 3 weeks up to 8 cycles followed by IMFINZI 1,500 mg every 4 weeks until disease progression or unacceptable toxicity. Patients with active or prior documented autoimmune or inflammatory disorders, HIV infection or other active infections, including tuberculosis or hepatitis C were ineligible [see Clinical Studies].

IMFINZI was discontinued due to adverse reactions in 6% of the patients receiving IMFINZI plus chemotherapy. The most frequently reported events resulting in discontinuation were sepsis (3 patients) and ischemic stroke (2 patients). The remaining events were dispersed across system organ classes and reported in 1 patient each. Serious adverse reactions occurred in 47% of patients receiving IMFINZI plus chemotherapy. The most frequent serious adverse reactions reported in at least 2% of patients were cholangitis (7%), pyrexia (3.8%), anemia (3.6%), sepsis (3.3%) and acute kidney injury (2.4%). Fatal adverse reactions occurred in 3.6% of patients receiving IMFINZI plus chemotherapy. These include ischemic or hemorrhagic stroke (4 patients), sepsis (2 patients), upper gastrointestinal hemorrhage (2 patients). The most common adverse reactions (occurring in ≥ 20% of patients) were fatigue, nausea, constipation, decreased appetite, abdominal pain, rash and pyrexia. Table 7 summarizes the adverse reactions that occurred in patients treated with IMFINZI plus chemotherapy.

Table 7: Adverse Reactions Occurring in ≥ 10% of Patients in the TOPAZ-1 Study

Adverse Reaction IMFINZI with Gemcitabine and Cisplatin
N = 338
Placebo with Gemcitabine and Cisplatin
N = 342
All Grades* (%) Grade* 3-4 (%) All Grades* (%) Grade* 3-4 (%)
General disorders and administration site conditions
Fatigue† 42 6 43 6
Pyrexia 20 1.5 16 0.6
Gastrointestinal disorcers
Nausea 40 1.5 34 1.8
Constipation 32 0.6 29 0.3
Abdominal pain‡ 24 0.6 23 2.9
Vomiting 18 1.5 18 2.0
Diarrhea 17 1.2 15 1.8
Metabolism and nutrition disorders
Decreased appetite 26 2.1 23 0.9
Skin and subcutaneous tissue disorders
Rash§ 23 0.9 14 0
Pruritus 11 0 8 0
Psychiatric disorders
Insomnia 10 0 11 0
* Graded according to NCI CTCAE version 5.0.
† Includes fatigue, malaise, cancer fatigue and asthenia.
‡ Includes abdominal pain, abdominal pain lower, abdominal pain upper and flank pain.
§ Includes rash macular, rash maculopapular, rash morbilliform, rash papular, rash pruritic, rash pustular, rash erythematous, dermatitis acneiform, dermatitis bullous, drug eruption, eczema, erythema, dermatitis and rash.

Table 8 summarizes the laboratory abnormalities in patients treated with IMFINZI plus chemotherapy.

Table 8: Laboratory Abnormalities Worsening from Baseline Occurring in ≥ 20%* of Patients in the TOPAZ-1 study

Laboratory Abnormality IMFINZI with Gemcitabine and Cisplatin Placebo with Gemcitabine and Cisplatin
Grade† 3 or 4 (%) Grade† 3 or 4 (%)
Chemistry
Hyponatremia 18 13
Gamma-glutamyltransferase increased 12 13
Increased bilirubin 10 14
Hypokalemia 8 4.4
Increased AST 8 8
Increased ALT 7 6
Blood creatinine increased 5 2.1
Hypomagnesemia 4.5 2.2
Hypoalbuminemia 3.6 2.9
Hyperkalemia 2.1 2.1
Increased Alkaline Phosphatase 1.8 3.8
Hypocalcemia 1.8 2.4
Hematology
Neutropenia 48 49
Anemia 31 28
Leukopenia 28 28
Lymphopenia 23 15
Thrombocytopenia 18 18
* The frequency cut off is based on any grade change from baseline.
† Graded according to NCI CTCAE version 5.0. Each test incidence is based on the number of patients who had both baseline and at least one on-study laboratory measurement available: IMFINZI + Gem/Cis (range: 312 to 335) and Placebo + Gem/Cis (range: 319 to 341).

Hepatocellular Carcinoma

The safety of IMFINZI in combination with tremelimumab-actl was evaluated in a total of 388 patients with uHCC in HIMALAYA, a randomized, open-label, multicenter study [see Clinical Studies]. Patients received IMFINZI 1,500 mg administered as a single intravenous infusion in combination with tremelimumab-actl 300 mg on the same day, followed by IMFINZI every 4 weeks or sorafenib 400 mg given orally twice daily.

Serious adverse reactions occurred in 41% of patients who received IMFINZI in combination with tremelimumab-actl. Serious adverse reactions in > 1% of patients included hemorrhage (6%), diarrhea (4%), sepsis (2.1%), pneumonia (2.1%), rash (1.5%), vomiting (1.3%), acute kidney injury (1.3%), and anemia (1.3%). Fatal adverse reactions occurred in 8% of patients who received IMFINZI in combination with tremelimumab-actl, including death (1%), hemorrhage intracranial (0.5%), cardiac arrest (0.5%), pneumonitis (0.5%), hepatic failure (0.5%), and immune-mediated hepatitis (0.5%). The most common adverse reactions (occurring in ≥ 20% of patients) were rash, diarrhea, fatigue, pruritis, musculoskeletal pain, and abdominal pain.

Permanent discontinuation of treatment regimen due to an adverse reaction occurred in 14% of patients; the most common adverse reactions leading to treatment discontinuation (≥ 1%) were hemorrhage (1.8%), diarrhea (1.5%), AST increased (1%), and hepatitis (1%).

Dosage interruptions or delay of the treatment regimen due to an adverse reaction occurred in 35% of patients. Adverse reactions which required dosage interruption or delay in ≥ 1% of patients included ALT increased (3.6%), diarrhea (3.6%), rash (3.6%), amylase increased (3.4%), AST increased (3.1%), lipase increased (2.8%), pneumonia (1.5%), hepatitis (1.5%), pyrexia (1.5%), anemia (1.3%), thrombocytopenia (1%), hyperthyroidism (1%), pneumonitis (1%), and blood creatinine increased (1%).

Table 9 summarizes the adverse reactions that occurred in patients treated with IMFINZI in combination with tremelimumab-actl in the HIMALAYA study.

Table 9: Adverse Reactions Occurring in ≥ 10% of Patients in the HIMALAYA study

Adverse Reaction IMFINZI and Tremelimumab-actl
(N=388)
Sorafenib
(N=374)
All Grades (%) Grade 3-4 (%) All Grades (%) Grade 3-4 (%)
Gastrointestinal disorders
Diarrhea* 27 6 45 4.3
Abdominal pain* 20 1.8 24 4
Nausea 12 0 14 0
Skin and subcutaneous tissue disorders
Rash* 32 2.8 57 12
Pruritus 23 0 6 0.3
Metabolism and nutrition disorders
Decreased appetite 17 1.3 18 0.8
General disorders and administration site conditions
Fatigue* 26 3.9 30 6
Pyrexia* 13 0.3 9 0.3
Psychiatric disorders
Insomnia 10 0.3 4.3 0
Endocrine disorders
Hypothyroidism* 14 0 6 0
Musculoskeletal and Connective Tissue Disorders
Musculoskeletal pain* 22 2.6 17 0.8
* Represents a composite of multiple related terms.

Table 10 summarizes the laboratory abnormalities that occurred in patients treated with IMFINZI in combination with tremelimumab-actl in the HIMALAYA study.

Table 10: Laboratory Abnormalities Worsening from Baseline Occurring in ≥ 20% of Patients in the HIMALAYA study

Laboratory Abnormality IMFINZI and Tremelimumab-actl Sorafenib
Any grade†(%)‡ Grade 3†or 4 (%)‡ Any gradef (%)‡ Grade 3† or 4 (%)‡
Chemistry
Aspartate Amino-transferase increased 63 27 55 21
Alanine Aminotransferase increased 56 18 53 12
Sodium decreased 46 15 40 11
Bilirubin increased 41 8 47 11
Alkaline Phosphatase increased 41 8 44 5
Glucose increased 39 14 29 4
Calcium decreased 34 0 43 0.3
Albumin decreased 31 0.5 37 1.7
Potassium increased 28 3.8 21 2.6
Creatinine increased 21 1.3 15 0.9
Hematology
Hemoglobin decreased 52 4.8 40 6
Lymphocytes decreased 41 11 39 10
Platelets decreased 29 1.6 35 3.1
Leukocytes decreased 20 0.8 30 1.1
† Graded according to NCI CTCAE version 4.03.
‡ Each test incidence is based on the number of patients who had both baseline and at least one on-study laboratory measurement available: IMFINZI with tremelimumab-actl (range: 367-378) and sorafenib (range:344-352).

DRUG INTERACTIONS

No information provided.

Warnings & Precautions

WARNINGS

Included as part of the PRECAUTIONS section.

PRECAUTIONS

Immune-Mediated Adverse Reactions

IMFINZI is a monoclonal antibody that belongs to a class of drugs that bind to either the programmed death-receptor 1 (PD-1) or the PD-ligand 1 (PD-L1), blocking the PD-1/PD-L1 pathway, thereby removing inhibition of the immune response, potentially breaking peripheral tolerance and inducing immune-mediated adverse reactions. Important immune-mediated adverse reactions listed under Warnings and Precautions may not include all possible severe and fatal immune-mediated reactions.

Immune-mediated adverse reactions, which may be severe or fatal, can occur in any organ system or tissue. Immune-mediated adverse reactions can occur at any time after starting treatment with a PD-1/PD-L1 blocking antibody. While immune-mediated adverse reactions usually manifest during treatment with PD-1/PD-L1 blocking antibodies, immune-mediated adverse reactions can also manifest after discontinuation of PD-1/PD-L1 blocking antibodies.

Early identification and management of immune-mediated adverse reactions are essential to ensure safe use of PD-1/PD-L1 blocking antibodies. Monitor patients closely for symptoms and signs that may be clinical manifestations of underlying immune-mediated adverse reactions. Evaluate liver enzymes, creatinine, and thyroid function at baseline and periodically during treatment. In cases of suspected immune-mediated adverse reactions, initiate appropriate workup to exclude alternative etiologies, including infection. Institute medical management promptly, including specialty consultation as appropriate.

Withhold or permanently discontinue IMFINZI depending on severity [see DOSAGE AND ADMINISTRATION]. In general, if IMFINZI requires interruption or discontinuation, administer systemic corticosteroid therapy (1 mg to 2 mg/kg/day prednisone or equivalent) until improvement to Grade 1 or less. Upon improvement to Grade 1 or less, initiate corticosteroid taper and continue to taper over at least 1 month. Consider administration of other systemic immunosuppressants in patients whose immune-mediated adverse reactions are not controlled with corticosteroid therapy.

Toxicity management guidelines for adverse reactions that do not necessarily require systemic steroids (e.g., endocrinopathies and dermatologic reactions) are discussed below.

Immune-Mediated Pneumonitis

IMFINZI can cause immune-mediated pneumonitis. The incidence of pneumonitis is higher in patients who have received prior thoracic radiation.

IMFINZI As A Single Agent

In Patients Who Did Not Receive Recent Prior Radiation

In patients who received IMFINZI on clinical trials in which radiation therapy was generally not administered immediately prior to initiation of IMFINZI, the incidence of immune-mediated pneumonitis was 2.4% (34/1414), including fatal (<0.1%), and Grade 3-4 (0.4%) adverse reactions. Events resolved in 19 of the 34 patients and resulted in permanent discontinuation in 5 patients. Systemic corticosteroids were required in 19 patients (19/34) with pneumonitis who did not receive chemoradiation prior to initiation of IMFINZI.

In Patients Who Received Recent Prior Radiation

The incidence of pneumonitis (including radiation pneumonitis) in patients with unresectable Stage III NSCLC following definitive chemoradiation within 42 days prior to initiation of IMFINZI in PACIFIC was 18.3% (87/475) in patients receiving IMFINZI and 12.8% (30/234) in patients receiving placebo. Of the patients who received IMFINZI (475) 1.1% were fatal and 2.7% were Grade 3 adverse reactions. Events resolved in 50 of the 87 patients and resulted in permanent discontinuation in 27 patients.

Systemic corticosteroids were required in 64 patients (64/87) with pneumonitis who had received chemoradiation prior to initiation of IMFINZI, while 2 patients required use of infliximab with high-dose steroids.

The frequency and severity of immune-mediated pneumonitis in patients who did not receive definitive chemoradiation prior to IMFINZI were similar whether IMFINZI was given as a single agent in patients with various cancers in a pooled data set or in patients with ES-SCLC or BTC when given in combination with chemotherapy.

IMFINZI With Tremelimumab-actl

Immune-mediated pneumonitis occurred in 1.3% (5/388) of patients receiving IMFINZI in combination with tremelimumab-actl, including fatal (0.3%) and Grade 3 (0.2%) adverse reactions. Events resolved in 3 of the 5 patients and resulted in permanent discontinuation in 1 patient. Systemic corticosteroids were required in all patients, of these 4 patients required high-dose corticosteroid treatment (at least 40 mg prednisone or equivalent per day). One patient (1/5) required other immunosuppressants.

Immune-Mediated Colitis

IMFINZI can cause immune-mediated colitis that is frequently associated with diarrhea. Cytomegalovirus (CMV) infection/reactivation has been reported in patients with corticosteroid-refractory immunemediated colitis. In cases of corticosteroid-refractory colitis, consider repeating infectious workup to exclude alternative etiologies.

IMFINZI As A Single Agent

Immune-mediated colitis occurred in 2% (37/1889) of patients receiving IMFINZI, including Grade 4 (<0.1%) and Grade 3 (0.4%) adverse reactions. Events resolved in 27 of the 37 patients and resulted in permanent discontinuation in 8 patients. Systemic corticosteroids were required in all patients with immune-mediated colitis, while 2 patients (2/37) required other immunosuppressants (e.g., infliximab, mycophenolate).

IMFINZI With Tremelimumab-actl

Immune-mediated colitis or diarrhea occurred in 6% (23/388) of patients receiving IMFINZI in combination with tremelimumab-actl, including Grade 3 (3.6%) adverse reactions. Events resolved in 22 of the 23 patients and resulted in permanent discontinuation in 5 patients. All patients received systemic corticosteroids, and 20 of the 23 patients received high-dose corticosteroid treatment (at least 40 mg prednisone or equivalent per day). Three patients also received other immunosuppressants.

Intestinal perforation has been observed in other studies of IMFINZI in combination with tremelimumabactl.

Immune-Mediated Hepatitis

IMFINZI can cause immune-mediated hepatitis.

IMFINZI As A Single Agent

Immune-mediated hepatitis occurred in 2.8% (52/1889) of patients receiving IMFINZI, including fatal (0.2%), Grade 4 (0.3%) and Grade 3 (1.4%) adverse reactions. Events resolved in 21 of the 52 patients and resulted in permanent discontinuation of IMFINZI in 6 patients. Systemic corticosteroids were required in all patients with immune-mediated hepatitis, while 2 patients (2/52) required use of mycophenolate with high-dose steroids.

IMFINZI With Tremelimumab-actl

Immune-mediated hepatitis occurred in 7.5% (29/388) of patients receiving IMFINZI in combination with tremelimumab-actl, including fatal (0.8%), Grade 4 (0.3%), and Grade 3 (4.1%) adverse reactions. Events resolved in 12 of the 29 patients and resulted in permanent discontinuation in 9 patients. Systemic corticosteroids were required in all 29 patients and all 29 patients required high-dose corticosteroid treatment (at least 40 mg prednisone or equivalent per day). Eight patients (8/29) required other immunosuppressants.

Immune-Mediated Endocrinopathies

Adrenal Insufficiency

IMFINZI can cause primary or secondary adrenal insufficiency. For Grade 2 or higher adrenal insufficiency, initiate symptomatic treatment, including hormone replacement as clinically indicated. Withhold or permanently discontinue IMFINZI based on the severity [see DOSAGE AND ADMINISTRATION].

IMFINZI As A Single Agent

Immune-mediated adrenal insufficiency occurred in 0.5% (9/1889) of patients receiving IMFINZI, including Grade 3 (<0.1%) adverse reactions. Events resolved in 1 of the 9 patients and did not lead to permanent discontinuation of IMFINZI in any patients. Systemic corticosteroids were required in all patients with adrenal insufficiency; of these, the majority remained on systemic corticosteroids.

IMFINZI With Tremelimumab-actl

Immune-mediated adrenal insufficiency occurred in 1.5% (6/388) of patients receiving IMFINZI in combination with tremelimumab-actl, including Grade 3 (0.3%) adverse reactions. Events resolved in 2 of the 6 patients. Systemic corticosteroids were required in all 6 patients and of these, 1 patient required high-dose corticosteroid treatment (at least 40 mg prednisone or equivalent per day).

Hypophysitis

IMFINZI can cause immune-mediated hypophysitis. Hypophysitis can present with acute symptoms associated with mass effect such as headache, photophobia, or visual field cuts. Hypophysitis can cause hypopituitarism. Initiate symptomatic treatment including hormone replacement as clinically indicated. Withhold or permanently discontinue IMFINZI depending on severity [see DOSAGE AND ADMINISTRATION].

IMFINZI As A Single Agent

Grade 3 hypophysitis/hypopituitarism occurred in <0.1% (1/1889) of patients who received IMFINZI. Treatment with systemic corticosteroids was administered in this patient. The event did not lead to permanent discontinuation of IMFINZI.

IMFINZI With Tremelimumab-actl

Immune-mediated hypophysitis/hypopituitarism occurred in 1% (4/388) of patients receiving IMFINZI in combination with tremelimumab-actl. Events resolved in 2 of the 4 patients. Systemic corticosteroids were required in 3 patients and of these, 1 patient received high-dose corticosteroid treatment (at least 40 mg prednisone or equivalent per day). Two patients also required endocrine therapy.

Thyroid Disorders

IMFINZI can cause immune-mediated thyroid disorders. Thyroiditis can present with or without endocrinopathy. Hypothyroidism can follow hyperthyroidism. Initiate hormone replacement therapy for hypothyroidism or institute medical management of hyperthyroidism as clinically indicated. Withhold or discontinue IMFINZI based on the severity [see DOSAGE AND ADMINISTRATION].

Thyroiditis

IMFINZI As A Single Agent

Immune-mediated thyroiditis occurred in 0.5% (9/1889) of patients receiving IMFINZI, including Grade 3 (<0.1%) adverse reactions. Events resolved in 4 of the 9 patients and resulted in permanent discontinuation in 1 patient. Systemic corticosteroids were required in 3 patients (3/9) with immunemediated thyroiditis, while 8 patients (8/9) required endocrine therapy.

IMFINZI With Tremelimumab-actl

Immune-mediated thyroiditis occurred in 1.5% (6/388) of patients receiving IMFINZI in combination with tremelimumab-actl. Events resolved in 2 of the 6 patients. Systemic corticosteroids were required in 2 patients (2/6) with immune-mediated thyroiditis, of these 1 patient required high-dose corticosteroid treatment (at least 40 mg prednisone or equivalent per day). All patients required other therapy including hormone replacement therapy, thiamazole, carbimazole, propylthiouracil, perchlorate, calcium channel blocker, or beta-blocker.

Hyperthyroidism

IMFINZI As A Single Agent

Immune-mediated hyperthyroidism occurred in 2.1% (39/1889) of patients receiving IMFINZI. Events resolved in 30 of the 39 patients and did not lead to permanent discontinuation of IMFINZI in any patients. Systemic corticosteroids were required in 9 patients (9/39) with immune-mediated hyperthyroidism, while 35 patients (35/39) required endocrine therapy.

IMFINZI with Tremelimumab-actl

Immune-mediated hyperthyroidism occurred in 4.6% (18/388) of patients receiving IMFINZI in combination with tremelimumab-actl, including Grade 3 (0.3%) adverse reactions. Events resolved in 15 of the 18 patients. Two patients (2/18) required high-dose corticosteroid treatment (at least 40 mg prednisone or equivalent per day). Seventeen patients required other therapy (thiamazole, carbimazole, propylthiouracil, perchlorate, calcium channel blocker, or beta-blocker).

Hypothyroidism

IMFINZI As A Single Agent

Immune-mediated hypothyroidism occurred in 8.3% (156/1889) of patients receiving IMFINZI, including Grade 3 (<0.1%) adverse reactions. Events resolved in 31 of the 156 patients and did not lead to permanent discontinuation of IMFINZI in any patients. Systemic corticosteroids were required in 11 patients (11/156) and the majority of patients (152/156) required long-term thyroid hormone replacement.

IMFINZI With Tremelimumab-actl

Immune-mediated hypothyroidism occurred in 11% (42/388) of patients receiving IMFINZI in combination with tremelimumab-actl. Events resolved in 5 of the 42 patients. One patient received highdose corticosteroid treatment (at least 40 mg prednisone or equivalent per day). All patients required other therapy (thiamazole, carbimazole, propylthiouracil, perchlorate, calcium channel blocker, or betablocker).

Type 1 Diabetes Mellitus, Which Can Present With Diabetic Ketoacidosis

Monitor patients for hyperglycemia or other signs and symptoms of diabetes. Initiate treatment with insulin as clinically indicated. Withhold or permanently discontinue IMFINZI based on the severity [see DOSAGE AND ADMINISTRATION].

IMFINZI As A Single Agent

Grade 3 immune-mediated type 1 diabetes mellitus occurred in <0.1% (1/1889) of patients receiving IMFINZI. This patient required long-term insulin therapy and IMFINZI was permanently discontinued. Two additional patients (0.1%, 2/1889) had events of hyperglycemia requiring insulin therapy that did not resolve at the time of reporting.

IMFINZI With Tremelimumab-actl

Two patients (0.5%, 2/388) had events of hyperglycemia requiring insulin therapy that had not resolved at last follow-up.

Immune-Mediated Nephritis With Renal Dysfunction

IMFINZI can cause immune-mediated nephritis.

IMFINZI As A Single Agent

Immune-mediated nephritis occurred in 0.5% (10/1889) of patients receiving IMFINZI, including Grade 3 (<0.1%) adverse reactions. Events resolved in 5 of the 10 patients and resulted in permanent discontinuation in 3 patients. Systemic corticosteroids were required in all patients with immunemediated nephritis.

IMFINZI With Tremelimumab-actl

Immune-mediated nephritis occurred in 1% (4/388) of patients receiving IMFINZI in combination with tremelimumab-actl, including Grade 3 (0.5%) adverse reactions. Events resolved in 3 of the 4 patients and resulted in permanent discontinuation in 2 patients. Systemic corticosteroids were required in all patients with immune-mediated nephritis, of these 3 patients required high-dose corticosteroid treatment (at least 40 mg prednisone or equivalent per day).

Immune-Mediated Dermatology Reactions

IMFINZI can cause immune-mediated rash or dermatitis. Exfoliative dermatitis, including Stevens Johnson Syndrome (SJS), drug rash with eosinophilia and systemic symptoms (DRESS), and toxic epidermal necrolysis (TEN), has occurred with PD-1/L-1 blocking antibodies. Topical emollients and/or topical corticosteroids may be adequate to treat mild to moderate non-exfoliative rashes. Withhold or permanently discontinue IMFINZI depending on severity [see DOSAGE AND ADMINISTRATION].

IMFINZI As A Single Agent

Immune-mediated rash or dermatitis occurred in 1.8% (34/1889) of patients receiving IMFINZI, including Grade 3 (0.4%) adverse reactions. Events resolved in 19 of the 34 patients and resulted in permanent discontinuation in 2 patients. Systemic corticosteroids were required in all patients with immune-mediated rash or dermatitis.

IMFINZI With Tremelimumab-actl

Immune-mediated rash or dermatitis occurred in 4.9% (19/388) of patients receiving IMFINZI in combination with tremelimumab-actl, including Grade 4 (0.3%) and Grade 3 (1.5%) adverse reactions. Events resolved in 13 of the 19 patients and resulted in permanent discontinuation in 2 patients. Systemic corticosteroids were required in all patients with immune-mediated rash or dermatitis, of these 12 patients required high-dose corticosteroid treatment (at least 40 mg prednisone or equivalent per day). One patient received other immunosuppressants.

Immune-Mediated Pancreatitis

IMFINZI in combination with tremelimumab-actl can cause immune-mediated pancreatitis.

IMFINZI With Tremelimumab-actl

Immune-mediated pancreatitis occurred in 2.3% (9/388) of patients receiving IMFINZI in combination with tremelimumab-actl, including Grade 4 (0.3%) and Grade 3 (1.5%) adverse reactions. Events resolved in 6 of the 9 patients. Systemic corticosteroids were required in all 9 patients and of these 7 patients required high-dose corticosteroid treatment (at least 40 mg prednisone or equivalent per day).

Other Immune-Mediated Adverse Reactions

The following clinically significant, immune-mediated adverse reactions occurred at an incidence of less than 1% each in patients who received IMFINZI or IMFINZI in combination with tremelimumab-actl, or were reported with the use of other PD-1/PD-L1 blocking antibodies.

Cardiac/vascular: Myocarditis, pericarditis, vasculitis.

Nervous system: Meningitis, encephalitis, myelitis and demyelination, myasthenic syndrome/myasthenia gravis (including exacerbation), Guillain-Barré syndrome, nerve paresis, autoimmune neuropathy.

Ocular: Uveitis, iritis, and other ocular inflammatory toxicities can occur. Some cases can be associated with retinal detachment. Various grades of visual impairment to include blindness can occur. If uveitis occurs in combination with other immune-mediated adverse reactions, consider a Vogt-Koyanagi-Haradalike syndrome, as this may require treatment with systemic steroids to reduce the risk of permanent vision loss.

Gastrointestinal: Pancreatitis including increases in serum amylase and lipase levels, gastritis, duodenitis.

Musculoskeletal and connective tissue disorders: Myositis/polymyositis, rhabdomyolysis and associated sequelae including renal failure, arthritis, polymyalgia rheumatic.

Endocrine: Hypoparathyroidism.

Other (hematologic/immune): Hemolytic anemia, aplastic anemia, hemophagocytic lymphohistiocytosis, systemic inflammatory response syndrome, histiocytic necrotizing lymphadenitis (Kikuchi lymphadenitis), sarcoidosis, immune thrombocytopenia, solid organ transplant rejection.

Infusion-Related Reactions

IMFINZI can cause severe or life-threatening infusion-related reactions.

Monitor for signs and symptoms of infusion-related reactions. Interrupt, slow the rate of, or permanently discontinue IMFINZI based on the severity [see DOSAGE AND ADMINISTRATION]. For Grade 1 or 2 infusion-related reactions, consider using pre-medications with subsequent doses.

IMFINZI As A Single Agent

Infusion-related reactions occurred in 2.2% (42/1889) of patients receiving IMFINZI, including Grade 3 (0.3%) adverse reactions.

IMFINZI In Combination With Tremelimumab-actl

Infusion-related reactions occurred in 10 (2.6%) patients receiving IMFINZI in combination with tremelimumab-actl.

Complications Of Allogeneic HSCT After IMFINZI

Fatal and other serious complications can occur in patients who receive allogeneic hematopoietic stem cell transplantation (HSCT) before or after being treated with a PD-1/L-1 blocking antibody. Transplantrelated complications include hyperacute graft-versus-host-disease (GVHD), acute GVHD, chronic GVHD, hepatic veno-occlusive disease (VOD) after reduced intensity conditioning, and steroid-requiring febrile syndrome (without an identified infectious cause). These complications may occur despite intervening therapy between PD-1/L-1 blockade and allogeneic HSCT.

Follow patients closely for evidence of transplant-related complications and intervene promptly. Consider the benefit versus risks of treatment with a PD-1/L-1 blocking antibody prior to or after an allogeneic HSCT.

Embryo-Fetal Toxicity

Based on its mechanism of action and data from animal studies, IMFINZI can cause fetal harm when administered to a pregnant woman. In animal reproduction studies, administration of durvalumab to cynomolgus monkeys from the onset of organogenesis through delivery resulted in increased premature delivery, fetal loss and premature neonatal death. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with IMFINZI and for 3 months after the last dose of IMFINZI [see Use In Specific Populations].

Patient Counseling Information

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

Immune-Mediated Adverse Reactions

Inform patients of the risk of immune-mediated adverse reactions that may require corticosteroid treatment and interruption or discontinuation of IMFINZI [see WARNINGS AND PRECAUTIONS], including:

  • Pneumonitis: Advise patients to contact their healthcare provider immediately for any new or worsening cough, chest pain, or shortness of breath.
  • Hepatitis: Advise patients to contact their healthcare provider immediately for jaundice, severe nausea or vomiting, pain on the right side of abdomen, lethargy, or easy bruising or bleeding.
  • Colitis: Advise patients to contact their healthcare provider immediately for diarrhea, blood or mucus in stools, or severe abdominal pain.
  • Endocrinopathies: Advise patients to contact their healthcare provider immediately for signs or symptoms of hypothyroidism, hyperthyroidism, adrenal insufficiency, type 1 diabetes mellitus, or hypophysitis.
  • Nephritis: Advise patients to contact their healthcare provider immediately for signs or symptoms of nephritis.
  • Dermatological Reactions: Advise patients to contact their healthcare provider immediately for signs or symptoms of severe dermatological reactions.
  • Pancreatitis: Advise patients to contact their healthcare provider immediately for signs or symptoms of pancreatitis.
  • Other Immune-Mediated Adverse Reactions: Advise patients to contact their healthcare provider immediately for signs or symptoms of pancreatitis, aseptic meningitis, encephalitis, immune thrombocytopenia, myocarditis, hemolytic anemia, myositis, uveitis, keratitis, and myasthenia gravis.

Infusion-Related Reactions

  • Advise patients to contact their healthcare provider immediately for signs or symptoms of infusion-related reactions [see WARNINGS AND PRECAUTIONS].

Complications Of Allogeneic HSCT

  • Advise patients of potential risk of post-transplant complications [see WARNINGS AND PRECAUTIONS].

Embryo-Fetal Toxicity

  • Advise females of reproductive potential that IMFINZI can cause harm to a fetus and to inform their healthcare provider of a known or suspected pregnancy [see WARNINGS AND PRECAUTIONS and Use In Specific Populations].
  • Advise females of reproductive potential to use effective contraception during treatment and for 3 months after the last dose of IMFINZI [see Use In Specific Populations].

Lactation

  • Advise female patients not to breastfeed while taking IMFINZI and for 3 months after the last dose [see WARNINGS AND PRECAUTIONS and Use In Specific Populations].

Nonclinical Toxicology

Carcinogenesis, Mutagenesis, Impairment Of Fertility

The carcinogenic and genotoxic potential of durvalumab have not been evaluated.

Animal fertility studies have not been conducted with durvalumab. In repeat-dose toxicology studies with durvalumab in sexually mature cynomolgus monkeys of up to 3 months duration, there were no notable effects on the male and female reproductive organs.

Use In Specific Populations

Pregnancy

Risk Summary

Based on findings from animal studies and its mechanism of action, IMFINZI can cause fetal harm when administered to a pregnant woman [see CLINICAL PHARMACOLOGY]. There are no available data on the use of IMFINZI in pregnant women.

In animal reproduction studies, administration of durvalumab to pregnant cynomolgus monkeys from the confirmation of pregnancy through delivery at exposure levels approximately 6 to 20 times higher than those observed at the clinical dose of 10 mg/kg (based on AUC), resulted in an increase in premature delivery, fetal loss, and premature neonatal death (see Data). Human immunoglobulin G1 (IgG1) is known to cross the placental barrier; therefore, durvalumab has the potential to be transmitted from the mother to the developing fetus. Apprise pregnant women of the potential risk to a fetus.

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.

Data

Animal Data

As reported in the literature, the PD-1/PD-L1 pathway plays a central role in preserving pregnancy by maintaining maternal immune tolerance to the fetus. In mouse allogeneic pregnancy models, disruption of PD-L1 signaling was shown to result in an increase in fetal loss. The effects of durvalumab on prenatal and postnatal development were evaluated in reproduction studies in cynomolgus monkeys. Durvalumab was administered from the confirmation of pregnancy through delivery at exposure levels approximately 6 to 20 times higher than those observed at the clinical dose of 10 mg/kg (based on AUC). Administration of durvalumab resulted in premature delivery, fetal loss (abortion and stillbirth), and increase in neonatal deaths. Durvalumab was detected in infant serum on postpartum Day 1, indicating the presence of placental transfer of durvalumab. Based on its mechanism of action, fetal exposure to durvalumab may increase the risk of developing immune-mediated disorders or altering the normal immune response and immune-mediated disorders have been reported in PD-1 knockout mice.

Lactation

Risk Summary

There are no data on the presence of durvalumab in human milk, the effects on the breastfed child, or the effects on milk production. Maternal IgG is known to be present in human milk. The effects of local gastrointestinal exposure and limited systemic exposure in the breastfed child to IMFINZI are unknown. Durvalumab was present in the milk of lactating cynomolgus monkeys and was associated with premature neonatal death (see Data).

Because of the potential for adverse reactions in breastfed infants, advise women not to breastfeed during treatment with IMFINZI and for 3 months after the last dose.

Data

In lactating cynomolgus monkeys, durvalumab was present in breast milk at about 0.15% of maternal serum concentrations after administration of durvalumab from the confirmation of pregnancy through delivery at exposure levels approximately 6 to 20 times higher than those observed at the recommended clinical dose of 10 mg/kg (based on AUC). Administration of durvalumab resulted in premature neonatal death.

Females And Males Of Reproductive Potential

IMFINZI can cause fetal harm when administered to a pregnant woman [see Use In Specific Populations].

Pregnancy Testing

Verify pregnancy status of females of reproductive potential prior to initiating treatment with IMFINZI.

Contraception

Females

Advise females of reproductive potential to use effective contraception during treatment with IMFINZI and for 3 months following the last dose of IMFINZI.

Pediatric Use

The safety and effectiveness of IMFINZI have not been established in pediatric patients.

Geriatric Use

Of the 476 patients treated with IMFINZI in the PACIFIC study, 45% were 65 years or older, while 7.6% were 75 years or older. No overall differences in safety or effectiveness were observed between patients 65 years or older and younger patients. The PACIFIC study did not include sufficient numbers of patients aged 75 years and over to determine whether they respond differently from younger patients.

Safety and efficacy were similar for patients age 65 years and younger and those older than 65 in patients with ES-SCLC treated with IMFINZI in combination with chemotherapy. Of the 265 patients with ESSCLC, 101 (38%) patients were 65 years or older and 19 (7.2%) patients were 75 years or older.

Of the 338 patients with BTC treated with IMFINZI in combination with chemotherapy in the TOPAZ-1 study, 158 (47%) patients were 65 years or older and 38 (11%) patients were 75 years or older. No overall differences in safety or effectiveness of IMFINZI have been observed between patients 65 years of age and older and younger adult patients.

Of the 393 patients with uHCC treated with IMFINZI in combination with tremelimumab-actl, 50% of patients were 65 years of age or older and 13% of patients were 75 years of age or older. No overall differences in safety or effectiveness of IMFINZI have been observed between patients 65 years of age and older and younger adult patients.

Overdose & Contraindications

OVERDOSE

No Information provided

CONTRAINDICATIONS

None.

Clinical Pharmacology

CLINICAL PHARMACOLOGY

Mechanism Of Action

Expression of programmed cell death ligand-1 (PD-L1) can be induced by inflammatory signals (e.g., IFN-gamma) and can be expressed on both tumor cells and tumor-associated immune cells in the tumor microenvironment. PD-L1 blocks T-cell function and activation through interaction with PD-1 and CD80 (B7.1). By binding to its receptors, PD-L1 reduces cytotoxic T-cell activity, proliferation, and cytokine production.

Durvalumab is a human immunoglobulin G1 kappa (IgG1κ) monoclonal antibody that binds to PD-L1 and blocks the interaction of PD-L1 with PD-1 and CD80 (B7.1). Blockade of PD-L1/PD-1 and PD-L1/CD80 interactions releases the inhibition of immune responses, without inducing antibody dependent cell-mediated cytotoxicity (ADCC).

PD-L1 blockade with durvalumab led to increased T-cell activation in vitro and decreased tumor size in co-engrafted human tumor and immune cell xenograft mouse models.

Pharmacodynamics

The steady state AUC, Ctrough, and Cmax in patients administered with 1,500 mg every 4 weeks are 6% higher, 19% lower, and 55% higher than those administered with 10 mg/kg every 2 weeks, respectively. Based on the modeling of pharmacokinetic data and exposure relationships for safety, there are no anticipated clinically meaningful differences in efficacy and safety for the doses of 1,500 mg every 4 weeks compared to 10 mg/kg every 2 weeks in patients weighing > 30 kg with NSCLC.

Pharmacokinetics

The pharmacokinetics of durvalumab as a single agent was studied in patients with doses ranging from 0.1 mg/kg (0.01 times the approved recommended dosage) to 20 mg/kg (2 times the approved recommended dosage) administered once every two, three, or four weeks.

PK exposure increased more than dose-proportionally at doses < 3 mg/kg (0.3 times the approved recommended dosage) and dose proportionally at doses ≥ 3 mg/kg every 2 weeks. Steady state was achieved at approximately 16 weeks.

The pharmacokinetics of durvalumab is similar when assessed as a single agent, when in combination with chemotherapy, and when in combination with tremelimumab-actl.

Distribution

The geometric mean (% coefficient of variation [CV%]) steady state volume of distribution (Vss) was 5.4 (13.1%) L.

Elimination

Durvalumab clearance decreases over time, with a mean maximal reduction (CV%) from baseline values of approximately 23% (57%) resulting in a geometric mean (CV%) steady state clearance (CLss) of 8.2 mL/h (39%) at day 365; the decrease in CLss is not considered clinically relevant. The geometric mean (CV%) terminal half-life, based on baseline CL was approximately 18 (24%) days.

Specific Populations

There were no clinically significant differences in the pharmacokinetics of durvalumab based on age (18 to 96 years), body weight (31 to 175 kg), sex, race (White, Black, Asian, Native Hawaiian, Pacific Islander, or American Indian), albumin levels (4 to 57 g/L), lactate dehydrogenase levels (18 to 15,800 U/L), soluble PD-L1 (67 to 3,470 pg/mL), tumor type (NSCLC, SCLC, BTC and HCC), mild or moderate renal impairment (CLcr 30 to 89 mL/min), and mild or moderate hepatic impairment (bilirubin ≤ 3x ULN and any AST). The effect of severe renal impairment (CLcr 15 to 29 mL/min) or severe hepatic impairment (bilirubin > 3x ULN and any AST) on the pharmacokinetics of durvalumab is unknown.

Immunogenicity

The observed incidence of anti-drug antibodies is highly dependent on the sensitivity and specificity of the assay. Differences in assay methods preclude meaningful comparison of the incidence of anti-drug antibodies (ADAs) in the studies described below with the incidence of ADAs in other studies including those of IMFINZI.

Of the 2,280 patients who received IMFINZI 10 mg/kg every 2 weeks or 20 mg/kg every 4 weeks as a single-agent, 69 patients (3%) tested positive for ADAs and 12 (0.5%) tested positive for neutralizing antibodies. The development of ADAs against durvalumab appears to have no clinically relevant effect on its pharmacokinetics or safety.

Of the 201 patients in the CASPIAN study who received IMFINZI 1,500 mg every 3 weeks in combination with chemotherapy for four doses followed by IMFINZI 1,500 mg every 4 weeks, no patients tested positive for treatment-emergent ADAs.

Of the 240 patients in the TOPAZ-1 study who received IMFINZI 1,500 mg every 3 weeks in combination with chemotherapy up to 8 cycles followed by IMFINZI 1,500 mg every 4 weeks, 2 (0.8%) patients tested positive for treatment-emergent ADAs and neutralizing antibodies, respectively. There were insufficient numbers of patients with treatment-emergent ADAs or neutralizing antibodies (2 patients each) to determine whether ADAs have an impact on pharmacokinetics, pharmacodynamics, safety and/or effectiveness of IMFINZI.

During the 12 week treatment period in the HIMALAYA study, of the 294 patients who received IMFINZI once every 4 weeks in combination with a single dose of tremelimumab-actl and who were evaluated for the presence of ADAs against IMFINZI at predose week 0, week 4 and week 12, 3.1% (9/294) of patients tested positive for anti-durvalumab-antibodies. Among the 9 patients who tested positive for ADA, 55.6% (5/9) tested positive for neutralizing antibodies against durvalumab. There was no identified clinically significant effect of anti-durvalumab antibodies on the safety of durvalumab; however, the effect of ADAs on the pharmacokinetics and effectiveness of durvalumab is unknown.

Animal Toxicology And/Or Pharmacology

In animal models, inhibition of PD-L1/PD-1 signaling increased the severity of some infections and enhanced inflammatory responses. Mycobacterium tuberculosis-infected PD-1 knockout mice exhibit markedly decreased survival compared with wild-type controls, which correlated with increased bacterial proliferation and inflammatory responses in these animals. PD-1 blockade using a primate anti-PD-1 antibody was also shown to exacerbate M. tuberculosis infection in rhesus macaques. PD-L1 and PD-1 knockout mice have also shown decreased survival following infection with lymphocytic choriomeningitis virus.

Clinical Studies

Non-Small Cell Lung Cancer (NSCLC)

The efficacy of IMFINZI was evaluated in the PACIFIC study (NCT02125461), a multicenter, randomized, double-blind, placebo-controlled study in patients with unresectable Stage III NSCLC who completed at least 2 cycles of concurrent platinum-based chemotherapy and definitive radiation within 42 days prior to initiation of the study drug and had a WHO performance status of 0 or 1. The study excluded patients who had progressed following concurrent chemoradiation, patients with active or prior documented autoimmune disease within 2 years of initiation of the study or patients with medical conditions that required systemic immunosuppression. Randomization was stratified by sex, age (< 65 years vs. ≥ 65 years), and smoking history (smoker vs. non-smoker). Patients were randomized 2:1 to receive IMFINZI 10 mg/kg or placebo intravenously every 2 weeks for up to 12 months or until unacceptable toxicity or confirmed RECIST v1.1-defined progression. Assessment of tumor status was performed every 8 weeks. The major efficacy outcome measures were progression-free survival (PFS) as assessed by a BICR RECIST v1.1, and overall survival (OS). Additional efficacy outcome measures included ORR and DoR assessed by BICR.

A total of 713 patients were randomized: 476 patients to the IMFINZI arm and 237 to the placebo arm. The study population characteristics were: median age of 64 years (range: 23 to 90); 70% male; 69% White and 27% Asian; 16% current smokers, 75% former smokers, and 9% never smokers; 51% WHO performance status of 1; 53% with Stage IIIA and 45% were Stage IIIB; 46% with squamous and 54% with non-squamous histology. All patients received definitive radiotherapy as per protocol, of which 92% received a total radiation dose of 54 Gy to 66 Gy; 99% of patients received concomitant platinum-based chemotherapy (55% cisplatin-based, 42% carboplatin-based chemotherapy, and 2% switched between cisplatin and carboplatin).

At a pre-specified interim analysis for OS based on 299 events (61% of total planned events), the study demonstrated a statistically significant improvement in OS in patients randomized to IMFINZI compared to placebo. The pre-specified interim analysis of PFS based on 371 events (81% of total planned events) demonstrated a statistically significant improvement in PFS in patients randomized to IMFINZI compared to placebo. Table 11 and Figure 1 summarizes the efficacy results for PACIFIC.

Table 11: Efficacy Results for the PACIFIC Study

Endpoint IMFINZI
(N = 476)*
Placebo
(N = 237)*
Overall Survival (OS)†
Number of deaths 183 (38%) 116 (49%)
Median in months (95% CI) NR (34.7, NR) 28.7 (22.9, NR)
Hazard Ratio (95% CI)‡ 0.68 (0.53, 0.87)
p-value‡,§ 0.0025
Progression-Free Survival (PFS)¶#
Number (%) of patients with event 214 (45%) 157 (66%)
Median in months (95% CI) 16.8 (13.0, 18.1) 5.6 (4.6, 7.8)
Hazard Ratio (95% CI)‡,Þ 0.52 (0.42, 0.65)
p-value‡,β <0.0001
Overall Survival (OS)†
Number of deaths 183 (38%) 116 (49%)
Median in months (95% CI) NR (34.7, NR) 28.7 (22.9, NR)
Hazard Ratio (95% CI)‡ 0.68 (0.53, 0.87)
p-value‡,§ 0.0025
* Among the ITT population, 7% in the IMFINZI arm and 10% in the placebo arm had non-measurable disease as assessed by BICR according to RECIST v1.1
† OS results are based on the interim OS analysis conducted at 299 OS events which occurred 46 months after study initiation
‡ Two-sided p-value based on a log-rank test stratified by sex, age, and smoking history
§ Compared with allocated α of 0.00274 (Lan-DeMets spending function approximating O’Brien Fleming boundary) for interim analysis
¶ As assessed by BICR RECIST v1.1
# PFS results are based on the interim PFS analysis conducted at 371 PFS events which occurred 33 months after study initiation
Þ Pike estimator
β Compared with allocated α of 0.011035 (Lan-DeMets spending function approximating O’Brien Fleming boundary) for interim analysis

Figure 1: Kaplan-Meier Curves of Overall Survival in the PACIFIC Study

Kaplan-Meier Curves of Overall Survival in
the PACIFIC Study - Illustration

Small Cell Lung Cancer (SCLC)

The efficacy of IMFINZI in combination with etoposide and either carboplatin or cisplatin in previously untreated ES-SCLC was investigated in CASPIAN, a randomized, multicenter, active-controlled, openlabel trial (NCT03043872). Eligible patients had WHO Performance Status of 0 or 1 and were suitable to receive a platinum-based chemotherapy regimen as first-line treatment for SCLC. Patients with asymptomatic or treated brain metastases were eligible. Choice of platinum agent was at the investigator’s discretion, taking into consideration the calculated creatinine clearance. Patients with history of chest radiation therapy; a history of active primary immunodeficiency; autoimmune disorders including paraneoplastic syndrome; active or prior documented autoimmune or inflammatory disorders; use of systemic immunosuppressants within 14 days before the first dose of the treatment except physiological dose of systemic corticosteroids were ineligible.

Randomization was stratified by the planned platinum-based therapy in cycle 1 (carboplatin or cisplatin).

The evaluation of efficacy for ES-SCLC relied on comparison between:

IMFINZI 1,500 mg, and investigator’s choice of carboplatin (AUC 5 or 6 mg/mL/min) or cisplatin (75-80 mg/m²) on Day 1 and etoposide (80-100 mg/m²) intravenously on Days 1, 2, and 3 of each 21-day cycle for 4 cycles, followed by IMFINZI 1,500 mg every 4 weeks until disease progression or unacceptable toxicity, or

Investigator’s choice of carboplatin (AUC 5 or 6 mg/mL/min) or cisplatin (75-80 mg/m²) on Day 1 and etoposide (80-100 mg/m²) intravenously on Days 1, 2, and 3 of each 21-day cycle, up to 6 cycles. After completion of chemotherapy, PCI as administered per investigator discretion.

Administration of IMFINZI as a single agent was permitted beyond disease progression if the patient was clinically stable and deriving clinical benefit as determined by the investigator.

The major efficacy outcome measure was overall survival (OS) of IMFINZI plus chemotherapy vs. chemotherapy alone. Additional efficacy outcome measures were investigator-assessed progression-free survival (PFS) and objective response rate (ORR), per RECIST v1.1.

The study population characteristics were: median age of 63 years (range: 28 to 82); 40% age 65 or older; 70% male; 84% White, 15% Asian, and 0.9% Black; 65% WHO/ECOG PS of 1; and 93% were former/current smokers. Ninety percent of patients had Stage IV disease and 10% had brain metastasis at baseline. A total of 25% of the patients received cisplatin and 74% of the patients received carboplatin. In the chemotherapy alone arm, 57% of the patients received 6 cycles of chemotherapy, and 8% of the patients received PCI.

The OS results are summarized in Table 12 and Figure 2.

Table 12: OS Result for the CASPIAN Study

Endpoint IMFINZI with Etoposide and either Carboplatin or Cisplatin
(n=268)
Etoposide and either Carboplatin or Cisplatin
(n=269)
Overall Survival (OS)
Number of deaths (%)* 155 (58) 181 (67)
Median OS (months) (95% CI) 13.0 (11.5, 14.8) 10.3 (9.3, 11.2)
Hazard Ratio (95% CI)† 0.73 (0.59, 0.91)
p-value1 0.0047
* At a pre-specified interim analysis, 336 OS events (79% of total planned events) were observed, and the boundary for declaring efficacy (0.0178) was determined by a Lan-Demets alpha spending function with O’Brien Fleming type boundary
† The analysis was performed using the stratified log-rank test, adjusting for planned platinum therapy in Cycle 1 (carboplatin or cisplatin) and using the rank tests of association approach

Figure 2: Kaplan-Meier Curves of Overall Survival in the CASPIAN Study

Kaplan-Meier Curves of Overall Survival in
the CASPIAN Study - Illustration

Investigator-assessed PFS (96% of total planned events) showed a HR of 0.78 (95% CI: 0.65, 0.94), with median PFS of 5.1 months (95% CI: 4.7, 6.2) in the IMFINZI plus chemotherapy arm and 5.4 months (95% CI: 4.8, 6.2) in the chemotherapy alone arm. The investigator-assessed confirmed ORR was 68% (95% CI: 62%, 73%) in the IMFINZI plus chemotherapy arm and 58% (95% CI: 52%, 63%) in the chemotherapy alone arm.

In the exploratory subgroup analyses of OS based on the planned platinum chemotherapy received at cycle 1, the HR was 0.70 (95% CI 0.55, 0.89) in patients who received carboplatin, and the HR was 0.88 (95% CI 0.55, 1.41) in patients who received cisplatin.

Biliary Tract Cancer (BTC)

The efficacy of IMFINZI in combination with gemcitabine and cisplatin in patients with locally advanced or metastatic BTC was investigated in TOPAZ-1 (NCT03875235), a randomized, double-blind, placebocontrolled, multicenter trial that enrolled 685 patients with histologically confirmed locally advanced unresectable or metastatic BTC who have not previously received systemic therapy. Patients with recurrent disease > 6 months after surgery and/or completion of adjuvant therapy were eligible. Patients had an ECOG Performance status of 0 and 1 and at least one target lesion by RECIST 1.1. Patients with ampullary carcinoma; active or prior documented autoimmune or inflammatory disorders; HIV infection or active infections, including tuberculosis or hepatitis C; current or prior use of immunosuppressive medication within 14 days before the first dose of IMFINZI were ineligible.

Randomization was stratified by disease status (recurrent vs. initially unresectable) and primary tumor location (intrahepatic cholangiocarcinoma [ICCA] vs. extrahepatic cholangiocarcinoma [ECCA] vs. gallbladder cancer [GBC]). Patients were randomized 1:1 to receive:

  • IMFINZI 1,500 mg on Day 1+ gemcitabine 1,000 mg/m² and cisplatin 25 mg/m² on Days 1 and 8 of each 21-day cycle up to 8 cycles, followed by IMFINZI 1,500 mg every 4 weeks, or
  • Placebo on Day 1+ gemcitabine 1,000 mg/m² and cisplatin 25 mg/m² on Days 1 and 8 of each 21-day cycle up to 8 cycles, followed by placebo every 4 weeks.

Treatment with IMFINZI or placebo continued until disease progression, or unacceptable toxicity. Treatment beyond disease progression was permitted if the patient was clinically stable and deriving clinical benefit as determined by the investigator.

The major efficacy outcome measure was overall survival (OS). Additional efficacy outcome measures were investigator-assessed progression-free survival (PFS), objective response rate (ORR) and duration of response (DoR). Tumor assessments were conducted every 6 weeks for the first 24 weeks after the date of randomization, and then every 8 weeks until confirmed objective disease progression.

The study population characteristics were: 50% male, median age of 64 years (range 20-85), 47% age 65 or older; 56% Asian, 37% White, 2% Black or African American, 0.1% American Indian or Alaskan Native, and 4% other; 51% had an ECOG PS of 1; primary tumor location was ICCA 56%, ECCA 18% and GBC 25%; 20% of patients had recurrent disease; 86% of patients had metastatic and 14% had locally advanced disease.

At a pre-specified interim analysis, the trial demonstrated a statistically significant improvement in OS and PFS in patients randomized to IMFINZI in combination with chemotherapy compared to placebo in combination with chemotherapy. Table 13 summarizes the efficacy results for TOPAZ-1.

Table 13: Efficacy Results for the TOPAZ-1 Study

Endpoint IMFINZI with Gemcitabine and Cisplatin
(n=341)
Placebo with Gemcitabine and Cisplatin
(n=344)
Overall Survival (OS)
Number of deaths (%) 198 (58) 226 (66)
Median OS (months) 12.8 11.5
(95% CI)* (11.1, 14) (10.1, 12.5)
Hazard Ratio (95% CI)† 0.80 (0.66, 0.97)
p-value‡ 0.021
Progression-Free Survival (PFS)
Number of patients with event (%) 276 (81) 297 (86)
Median in months (95% CI)* 7.2(6.7, 7.4) 5.7(5.6, 6.7)
Hazard Ratio (95% CI)† 0.75 (0.63, 0.89)
p-value§ 0.001
* Kaplan-Meier estimated median with 95% CI derived using Brookmeyer-Crowley method
† Based on Cox proportional hazards model stratified by disease status and primary tumor location
‡ 2-sided p-value based on a stratified log-rank test compared with alpha boundary of 0.030
§ 2-sided p-value based on a stratified log-rank test compared with alpha boundary of 0.048

The investigator-assessed ORR was 27% (95% CI: 22% - 32%) in the IMFINZI plus chemotherapy arm and 19% (95% CI: 15%-23%) in the chemotherapy alone arm.

Figure 3: Kaplan-Meier Curve of OS in TOPAZ-1 Study

Kaplan-Meier Curve of OS in TOPAZ-1 Study - Illustration

Hepatocellular Carcinoma (HCC)

The efficacy of IMFINZI in combination with tremelimumab-actl was evaluated in the HIMALAYA study (NCT03298451), a randomized (1:1:1), open-label, multicenter study in patients with confirmed uHCC who had not received prior systemic treatment for HCC. Patients were randomized to one of two investigational arms (IMFINZI plus trememlimumab-act or IMFINZI) or sorafenib). Study treatment consisted of IMFINZI 1,500 mg in combination with tremelimumab-actl as a one-time single intravenous infusion of 300 mg on the same day, followed by IMFINZI every 4 weeks; IMFINZI 1,500 mg every 4 weeks (an unapproved regimen for uHCC); or sorafenib 400 mg given orally twice daily, until disease progression or unacceptable toxicity. The efficacy assessment of IMFINZI is based on patients randomized to the IMFINZI plus tremelimumab-actl arm versus the sorafenib arm. Randomization was stratified by macrovascular invasion (MVI) (yes or no), etiology of liver disease (hepatitis B virus vs. hepatitis C virus vs. others) and ECOG performance status (0 vs. 1).

The study enrolled patients with BCLC Stage C or B (not eligible for locoregional therapy). The study excluded patients with co-infection of viral hepatitis B and hepatitis C; active or prior documented gastrointestinal (GI) bleeding within 12 months; ascites requiring non-pharmacologic intervention within 6 months; hepatic encephalopathy within 12 months before the start of treatment; active or prior documented autoimmune or inflammatory disorders. Esophagogastroduodenoscopy was not mandated prior to enrollment but adequate endoscopic therapy, according to institutional standards, was required for patients with history of esophageal variceal bleeding or those assessed as high risk for esophageal variceal bleeding by the treating physician.

Study treatment was permitted beyond disease progression if the patient was clinically stable and deriving clinical benefit as determined by the investigator.

The major efficacy outcome measure was overall survival (OS) between the IMFINZI plus tremelimumab-actl arm versus the sorafenib arm. Additional efficacy outcomes were investigatorassessed progression-free survival (PFS), objective response rate (ORR) and duration of response (DoR) according to RECIST v1.1. Tumor assessments were conducted every 8 weeks for the first 12 months and then every 12 weeks thereafter.

The baseline demographics of the IMFINZI plus tremelimumab-actl and sorafenib arms were as follows: male (85%), age < 65 years (50%), median age of 65 years (range: 18 to 88 years), White (46%), Asian (49%), Black or African American (2%), Native Hawaiian or other Pacific Islander (0.1%), race Unknown (2%), Hispanic or Latino (5%), Not Hispanic or Latino (94%), ethnicity Unknown (1%), ECOG PS 0 (62%); Child-Pugh Class score A (99%), macrovascular invasion (26%), extrahepatic spread (53%), viral etiology; hepatitis B (31%), hepatitis C (27%), uninfected (42%). Efficacy results are presented in Table 14 and Figure 4.

Table 14: Efficacy Results for the HIMALAYA Study

Endpoint IMFINZI and Tremelimumab-actl
(N=393)
Sorafenib
(N=389)
OS
Number of deaths (%) 262 (66.7) 293 (75.3)
Median OS (months) 16.4 13.8
(95% CI) (14.2, 19.6) (12.3, 16.1)
HR (95% CI)* 0.78 (0.66, 0.92)
p-value†,‡ 0.0035
PFS
Number of events (%) 335 (85.2) 327 (84.1)
Median PFS (months) 3.8 4.1
(95% CI) (3.7, 5.3) (3.7, 5.5)
HR (95% CI)* 0.90 (0.77, 1.05)
ORR
ORR % (95% CI)§,¶ 20.1 (16.3, 24.4) 5.1 (3.2, 7.8)
Complete Response n (%) 12 (3.1) 0
Partial Response n (%) 67 (17.0) 20 (5.1)
DoR
Median DoR (months) (95% CI) 22.3 (13.7, NR) 18.4 (6.5, 26.0)
% with duration ≥ 6 months 82.3 78.9
% with duration ≥12 months 65.8 63.2
* HR (IMJUDO and durvalumab vs. sorafenib) based on the stratified Cox proportional hazard model.
† Based on a stratified log-rank test.
‡ Based on a Lan-DeMets alpha spending function with O'Brien Fleming type boundary and the actual number of events observed, the boundary for declaring statistical significance for IMJUDO and durvalumab vs. sorafenib was 0.0398 (Lan and DeMets 1983).
§ Confirmed complete response or partial response.
¶Based on Clopper-Pearson method.
CI=Confidence Interval, HR=Hazard Ratio, NR=Not Reached

Figure 4: Kaplan-Meier curve of OS

Kaplan-Meier curve of OS - Illustration

Medication Guide

PATIENT INFORMATION

IMFINZI®
(im-FIN-zee)
(durvalumab) injection

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

IMFINZI is a medicine that may treat certain cancers by working with your immune system.

IMFINZI can cause your immune system to attack normal organs and tissues in any area of your body and can affect the way they work. These problems can sometimes become severe or life-threatening and can lead to death. You can have more than one of these problems at the same time. These problems may happen anytime during treatment or even after your treatment has ended.

Call or see your healthcare provider right away if you develop any new or worsening signs or symptoms, including:

Lung problems.

  • cough
  • shortness of breath
  • chest pain

Intestinal problems.

  • diarrhea (loose stools) or more frequent bowel movements than usual
  • stools that are black, tarry, sticky, or have blood or mucus
  • severe stomach-area (abdomen) pain or tenderness

Liver problems.

  • yellowing of your skin or the whites of your eyes
  • severe nausea or vomiting
  • pain on the right side of your stomach-area (abdomen)
  • dark urine (tea colored)
  • bleeding or bruising more easily than normal

Hormone gland problems.

  • headaches that will not go away or unusual headaches
  • eye sensitivity to light
  • eye problems
  • rapid heartbeat
  • increase sweating
  • extreme tiredness
  • weight gain or weight loss
  • feeling more hungry or thirsty than usual
  • urinating more often than usual
  • hair loss
  • feeling cold
  • constipation
  • your voice gets deeper
  • dizziness or fainting
  • changes in mood or behavior, such as decreased sex drive, irritability, or forgetfulness

Kidney problems.

  • decrease in your amount of urine
  • blood in your urine
  • swelling of your ankles
  • loss of appetite

Skin problems.

  • rash
  • itching
  • skin blistering or peeling
  • painful sores or ulcers in mouth or nose, throat, or genital area
  • fever or flu-like symptoms
  • swollen lymph nodes

Pancreas problems

  • pain in your upper stomach area (abdomen)
  • severe nausea or vomiting
  • loss of appetite

Problems can also happen in other organs and tissues. These are not all of the signs and symptoms of immune system problems that can happen with IMFINZI. Call or see your healthcare provider right away for any new or worsening signs or symptoms, which may include:

  • chest pain, irregular heartbeats, shortness of breath or swelling of ankles
  • confusion, sleepiness, memory problems, changes in mood or behavior, stiff neck, balance problems, tingling or numbness of the arms or legs
  • double vision, blurry vision, sensitivity to light, eye pain, changes in eye sight
  • persistent or severe muscle pain or weakness, muscle cramps
  • low red blood cells, bruising.

Infusion reactions that can sometimes be severe or life-threatening. Signs and symptoms of infusion reactions may include:

  • chills or shaking
  • itching or rash
  • flushing
  • shortness of breath or wheezing
  • dizziness
  • feel like passing out
  • fever
  • back or neck pain

Complications, including graft-versus-host disease (GVHD), in people who have received a bone marrow (stem cell) transplant that uses donor stem cells (allogeneic).

These complications can be serious and can lead to death. These complications may happen if you underwent transplantation either before or after being treated with IMFINZI. Your healthcare provider will monitor you for these complications.

Getting medical treatment right away may help keep these problems from becoming more serious.

Your healthcare provider will check you for these problems during your treatment with IMFINZI. Your healthcare provider may treat you with corticosteroid or hormone replacement medicines. Your healthcare provider may also need to delay or completely stop treatment with IMFINZI, if you have severe side effects.

What is IMFINZI?

IMFINZI is a prescription medicine used to treat adults with:

  • a type of lung cancer called non-small cell lung cancer (NSCLC). IMFINZI may be used when your NSCLC:
    • has not spread outside your chest
    • cannot be removed by surgery, and
    • has responded or stabilized with initial treatment with chemotherapy that contains platinum, given at the same time as radiation therapy.
  • a type of lung cancer called small cell lung cancer (SCLC). IMFINZI may be used with the chemotherapy medicines etoposide and carboplatin or cisplatin as your first treatment when your SCLC:
    • has spread within your lungs or to other parts of the body, (extensive-stage small cell lung cancer, or ES-SCLC).
    • a type of cancer called biliary tract cancer (BTC), including cancer of the bile ducts (cholangiocarcinoma) and gallbladder cancer. IMFINZI may be used in combination with chemotherapy medicines gemcitabine and cisplatin when your BTC:
    • has spread to nearby tissues (locally advanced), or
    • has spread to other parts of the body (metastatic).
  • a type of liver cancer that cannot be removed by surgery (unresectable hepatocellular carcinoma or uHCC). IMFINZI is used in combination with tremelimumab-actl to treat uHCC.

It is not known if IMFINZI is safe and effective in children.

Before you receive IMFINZI, tell your healthcare provider about all of your medical conditions, including if you:

  • have immune system problems such as Crohn's disease, ulcerative colitis, or lupus
  • have received an organ transplant
  • have received or plan to receive a stem cell transplant that uses donor stem cells (allogeneic)
  • have received radiation treatment to your chest area
  • have a condition that affects your nervous system, such as myasthenia gravis or Guillain-Barré syndrome
  • are pregnant or plan to become pregnant. IMFINZI can harm your unborn baby.
  • are breastfeeding or plan to breastfeed. It is not known if IMFINZI passes into your breast milk. Do not breastfeed during treatment and for 3 months after the last dose of IMFINZI.

Females who are able to become pregnant:

    • Your healthcare provider will give you a pregnancy test before you start treatment with IMFINZI.
    • You should use an effective method of birth control during your treatment and for at least 3 months after the last dose of IMFINZI. Talk to your healthcare provider about birth control methods that you can use during this time.
    • Tell your healthcare provider right away if you become pregnant or think you may be pregnant during treatment with IMFINZI.

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

How will I receive IMFINZI?

  • Your healthcare provider will give you IMFINZI into your vein through an intravenous (IV) line over 60 minutes.
  • IMFINZI is usually given every 2, 3 or 4 weeks.
  • Your healthcare provider will decide how many treatments you need.
  • Your healthcare provider will test your blood to check you for certain side effects.
  • If you miss any appointments, call your healthcare provider as soon as possible to reschedule your appointment.

What are the possible side effects of IMFINZI?

IMFINZI can cause serious side effects, including:

See “What is the most important information I should know about IMFINZI?”

The most common side effects of IMFINZI in people with NSCLC include:

  • cough
  • upper respiratory tract infections
  • feeling tired
  • shortness of breath
  • inflammation in the lungs
  • rash

The most common side effects of IMFINZI when used with other anticancer medicines in people with ES-SCLC include:

  • nausea
  • hair loss
  • feeling tired or weak

The most common side effects of IMFINZI when used with other anticancer medicines in people with BTC include:

  • feeling tired
  • nausea
  • constipation
  • stomach (abdominal) pain
  • rash
  • fever
  • decreased appetite

The most common side effects of IMFINZI when used with tremelimumab-actl in adults with uHCC include:

  • rash
  • diarrhea
  • feeling tired
  • itchiness
  • muscle or bone pain
  • stomach (abdominal) pain

Tell your healthcare provider if you have any side effect that bothers you or that does not go away.

These are not all the possible side effects of IMFINZI. Ask your healthcare provider or pharmacist for more information.

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

General information about the safe and effective use of IMFINZI.

Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. If you would like more information about IMFINZI, talk with your healthcare provider. You can ask your healthcare provider for information about IMFINZI that is written for health professionals.

What are the ingredients in IMFINZI?

Active ingredient: durvalumab

Inactive ingredients: L-histidine, L-histidine hydrochloride monohydrate, α,α-trehalose dihydrate, polysorbate 80, water for injection, USP.

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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