Mektovi Drug Information

• The following adverse reactions are described elsewhere in the labeling:
• New Primary Malignancies [see Warnings and Precautions (5.1) ]
• Cardiomyopathy [see Warnings and Precautions (5.2) ]
• Venous Thromboembolism [see Warnings and Precautions (5.3) ]
• Ocular Toxicities [see Warnings and Precautions (5.4) ]
• Interstitial Lung Disease [see Warnings and Precautions (5.5) ]
• Hepatotoxicity [see Warnings and Precautions (5.6) ]
• Rhabdomyolysis [see Warnings and Precautions (5.7) ]
• Hemorrhage [see Warnings and Precautions (5.8) ]
• Embryo-Fetal Toxicity [see Warnings and Precautions (5.9) ]
• Risks Associated with Combination Treatment [see Warnings and Precautions (5.10) ] Melanoma: Most common adverse reactions (≥25%) for MEKTOVI, in combination with encorafenib, are fatigue, nausea, diarrhea, vomiting, and abdominal pain. ( 6.1 ) NSCLC: Most common adverse reactions (≥25%) for MEKTOVI, in combination with encorafenib, are fatigue, nausea, diarrhea, musculoskeletal pain, vomiting, abdominal pain, visual impairment, constipation, dyspnea, rash, and cough. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Pfizer Inc. at 1-800-438-1985 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 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 WARNINGS AND PRECAUTIONS reflect exposure of 192 patients with BRAF V600 mutation-positive unresectable or metastatic melanoma to MEKTOVI 45 mg twice daily in combination with encorafenib 450 mg once daily in a randomized open-label, active-controlled trial (COLUMBUS) [see Clinical Studies (14.1) ] or, for rare events, exposure of 690 patients with BRAF V600 mutation-positive melanoma to MEKTOVI 45 mg twice daily in combination with encorafenib once daily across multiple clinical trials (NCT03915951, NCT01909453). The pooled safety population described in the WARNINGS AND PRECAUTIONS also reflect exposure of 98 patients with BRAF V600E mutation-positive metastatic non-small cell lung cancer to MEKTOVI 45 mg twice daily and encorafenib 450 mg once daily until disease progression or unacceptable toxicity in PHAROS [see Clinical Studies (14.2) ] . BRAF V600E or V600K Mutation-Positive Unresectable or Metastatic Melanoma The data described below reflect exposure of 192 patients with BRAF V600 mutation-positive unresectable or metastatic melanoma to MEKTOVI (45 mg twice daily) in combination with encorafenib (450 mg once daily) in COLUMBUS. The COLUMBUS trial [see Clinical Studies (14.1) ] excluded patients with a history of Gilbert's syndrome, abnormal left ventricular ejection fraction, prolonged QTc (>480 msec), uncontrolled hypertension, and history or current evidence of retinal vein occlusion. The median duration of exposure was 11.8 months for patients treated with MEKTOVI in combination with encorafenib and 6.2 months for patients treated with vemurafenib. The most common (≥25%) adverse reactions in patients receiving MEKTOVI in combination with encorafenib were fatigue, nausea, diarrhea, vomiting, and abdominal pain. Adverse reactions leading to dose interruptions of MEKTOVI occurred in 33% of patients receiving MEKTOVI in combination with encorafenib; the most common were left ventricular dysfunction (6%) and serous retinopathy (5%). Adverse reactions leading to dose reductions of MEKTOVI occurred in 19% of patients receiving MEKTOVI in combination with encorafenib; the most common were left ventricular dysfunction (3%), serous retinopathy (3%), and colitis (2%). Five percent (5%) of patients receiving MEKTOVI in combination with encorafenib experienced an adverse reaction that resulted in permanent discontinuation of MEKTOVI. The most common adverse reactions resulting in permanent discontinuation of MEKTOVI were hemorrhage in 2% and headache in 1% of patients. Table 3 and Table 4 present adverse drug reactions and laboratory abnormalities, respectively, identified in COLUMBUS. The COLUMBUS trial was not designed to demonstrate a statistically significant difference in adverse reaction rates for MEKTOVI in combination with encorafenib, as compared to vemurafenib, for any specific adverse reaction listed in Table 3. Table 3: Adverse Reactions Occurring in ≥10% of Patients Receiving MEKTOVI in Combination with Encorafenib in COLUMBUS Grades per National Cancer Institute CTCAE v4.03. Adverse Reaction MEKTOVI with encorafenib N=192 Vemurafenib N=186 All Grades (%) Grades 3 and 4 Grade 4 adverse reactions limited to diarrhea (n=1) and hemorrhage (n=3) in the MEKTOVI with encorafenib arm and constipation (n=1) in the vemurafenib arm. (%) All Grades (%) Grades 3 and 4 (%) General Disorders and Administration Site Conditions Fatigue Represents a composite of multiple, related preferred terms. 43 3 46 6 Pyrexia 18 4 30 0 Peripheral edema 13 1 15 1 Gastrointestinal Disorders Nausea 41 2 34 2 Diarrhea 36 3 34 2 Vomiting 30 2 16 1 Abdominal pain 28 4 16 1 Constipation 22 0 6 1 Skin and Subcutaneous Tissue Disorders Rash 22 1 53 13 Nervous System Disorders Dizziness 15 3 4 0 Visual Disorders Visual impairment 20 0 4 0 Serous retinopathy/RPED 20 3 2 0 Vascular Disorders Hemorrhage 19 3 9 2 Hypertension 11 6 11 3 Other clinically important adverse reactions occurring in <10% of patients who received MEKTOVI in combination with encorafenib were: Gastrointestinal disorders: Colitis Skin and subcutaneous tissue disorders: Panniculitis, Photosensitivity Immune system disorders: Drug hypersensitivity Table 4: Laboratory Abnormalities Occurring in ≥10% (All grades) of Patients Receiving MEKTOVI in Combination with Encorafenib in COLUMBUS Grades per National Cancer Institute CTCAE v4.03. Laboratory Abnormality MEKTOVI with encorafenib N=192 Vemurafenib N=186 All Grades (%) Grades 3 and 4 (%) All Grades (%) Grades 3 and 4 (%) Hematology Anemia 36 3.6 34 2.2 Leukopenia 13 0 10 0.5 Lymphopenia 13 2.1 30 7 Neutropenia 13 3.1 4.8 0.5 Chemistry Increased Creatinine 93 3.6 92 1.1 Increased Creatine Phosphokinase 58 5 3.8 0 Increased Gamma Glutamyl Transferase 45 11 34 4.8 Increased ALT 29 6 27 2.2 Increased AST 27 2.6 24 1.6 Increased Alkaline Phosphatase 21 0.5 35 2.2 Hyponatremia 18 3.6 15 0.5 BRAF V600E Mutation-Positive Metastatic Non-Small Cell Lung Cancer (NSCLC) The safety of MEKTOVI in combination with encorafenib is described in 98 patients with BRAF V600E mutation-positive metastatic NSCLC who received MEKTOVI (45 mg twice daily) in combination with encorafenib (450 mg once daily) in an open-label, single-arm trial (PHAROS). The PHAROS trial [see Clinical Studies (14.2) ] excluded patients with abnormal LVEF, prolonged QTc (>480 ms), uncontrolled hypertension, and history or current evidence of retinal vein occlusion. The median duration of treatment for MEKTOVI and encorafenib was 8.4 and 9.2 months respectively. The most common (≥25%) adverse reactions in patients receiving MEKTOVI were fatigue, nausea, diarrhea, musculoskeletal pain, vomiting, abdominal pain, visual impairment, constipation, dyspnea, rash, and cough. Adverse reactions leading to dose interruptions of MEKTOVI occurred in 62% of patients receiving MEKTOVI; the most common (≥5%) were diarrhea (17%); nausea (15%); fatigue (9%); AST increased (7%); ALT increased, anemia, musculoskeletal pain, vomiting (6% each); and acute kidney injury, hemorrhage, and LV dysfunction/cardiomyopathy (5% each). Adverse reactions leading to dose reductions of MEKTOVI occurred in 33% of patients receiving MEKTOVI; the most common (≥5%) were diarrhea (8%), nausea (6%), and AST increased (5%). A total of 17% of patients receiving MEKTOVI experienced an adverse reaction that resulted in permanent discontinuation of MEKTOVI; the most common (≥2%) were diarrhea (3.1%); musculoskeletal pain, LV dysfunction/cardiomyopathy, fatigue, nausea, rash, visual impairment, and vomiting (2% each). None of the other adverse reactions leading to permanent discontinuation of MEKTOVI occurred in more than 1 patient. Serious adverse reactions occurred in 38% of patients who received MEKTOVI in combination with encorafenib. Serious adverse reactions in ≥2% of patients included hemorrhage (6%); diarrhea (4.1%); anemia, dyspnea, pneumonia (3.1% each); arrhythmia, device related infection, edema, myocardial infarction, and pleural effusion (2% each). Fatal adverse reactions occurred in 2% of patients who received MEKTOVI (45 mg twice-daily) in combination with encorafenib, including intracranial hemorrhage and myocardial infarction (1% each). Table 5 and Table 6 present adverse drug reactions and laboratory abnormalities, respectively, identified in PHAROS. Table 5: Adverse Reactions Occurring in ≥10% of Patients Receiving MEKTOVI in Combination with Encorafenib in PHAROS Grades per National Cancer Institute CTCAE v4.03. Adverse Reaction MEKTOVI with encorafenib N=98 All Grades (%) Grade 3 and 4 One Grade 5 adverse reaction of hemorrhage occurred. (%) General Disorders and Administration Site Conditions Fatigue Fatigue includes fatigue, asthenia. 61 8 Edema Edema includes edema peripheral, generalized edema, swelling, localized edema, face edema. 23 1 Pyrexia 22 0 Gastrointestinal Disorders Nausea 58 3.1 Diarrhea Diarrhea includes diarrhea, colitis. 52 7 Vomiting 37 1 Abdominal pain Abdominal pain includes abdominal pain, abdominal pain upper, abdominal discomfort, epigastric discomfort. 32 1 Constipation 27 0 Eye Disorders Visual impairment Visual impairment includes vision blurred, visual impairment, vitreous floaters, photophobia, visual acuity reduced, photopsia. 29 2 Musculoskeletal and Connective Tissue Disorders Musculoskeletal pain Musculoskeletal pain includes back pain, arthralgia, pain in extremity, myalgia, musculoskeletal chest pain, non-cardiac chest pain, neck pain. 48 4.1 Skin and Subcutaneous Tissue Disorders Rash Rash includes rash, rash macular, rash maculo-papular, rash papular, rash pustular,dermatitis acneiform, palmar-plantar erythrodysesthesia syndrome, eczema, skin exfoliation. 27 3.1 Pruritis Pruritis includes pruritus, pruritus genital. 16 0 Dry skin 13 0 Alopecia 12 0 Respiratory, Thoracic and Mediastinal Disorders Dyspnea Dyspnea includes dyspnea, dyspnea exertional. 27 8 Cough Cough includes cough, productive cough. 26 0 Nervous System Disorders Dizziness Dizziness includes dizziness, balance disorder. 17 1 Headache 11 0 Metabolism and Nutrition Disorders Decreased appetite 14 1 Vascular Disorders Hemorrhage Hemorrhage includes anal hemorrhage, hemothorax, gastrointestinal hemorrhage, hematochezia, hematuria, hemoptysis, hemorrhage intracranial, hyphema, small intestinal hemorrhage, upper gastrointestinal hemorrhage, vaginal hemorrhage. 12 4.1 Hypertension 10 5 Cardiac Disorders Left ventricular dysfunction/cardiomyopathy Left ventricular dysfunction/cardiomyopathy includes ejection fraction decreased, cardiac failure, cardiac failure congestive. 11 1 Investigations Weight increased 11 1 Psychiatric Disorders Insomnia 10 0 Other clinically important adverse reactions occurring in <10% of patients who received MEKTOVI in combination with encorafenib were: Nervous system disorders: Peripheral neuropathy, Dysgeusia, Facial paresis Gastrointestinal disorders: Pancreatitis Skin and subcutaneous tissue disorders: Hyperkeratosis, Erythema, Photosensitivity Immune system disorders: Drug hypersensitivity Table 6: Laboratory Abnormalities Occurring in ≥10% (All Grades) of Patients Receiving MEKTOVI with Encorafenib in PHAROS Grades per National Cancer Institute CTCAE v4.03. Laboratory Abnormality Based on the number of patients with available baseline and at least one on-treatment laboratory test. MEKTOVI with encorafenib All Grades (%) Grades 3 and 4 (%) Hematology Anemia 47 11 Lymphopenia 24 6 Thrombocytopenia 20 1.1 Leukopenia 12 0 Neutropenia 12 1.1 Chemistry Increased creatinine 91 3.2 Hyperglycemia 48 6 Increased creatine kinase 41 3.3 Lipase increased 40 14 Increased ALT 34 9 Hypoalbuminemia 32 0 Increased AST 31 10 Increased alkaline phosphatase 31 3.2 Hyperkalemia 31 2.1 Hyponatremia 26 11 Serum amylase increased 22 1.1 Hypocalcemia 12 2.1

No clinically important drug interactions have been observed with MEKTOVI.

Pregnancy Risk Summary Based on findings from animal reproduction studies and its mechanism of action , MEKTOVI can cause fetal harm when administered to a pregnant woman. There are no available clinical data on the use of MEKTOVI during pregnancy. In animal reproduction studies, oral administration of binimetinib during the period of organogenesis was embryotoxic and an abortifacient in rabbits at doses greater than or equal to those resulting in exposures approximately 5 times the human exposure at the clinical dose of 45 mg twice daily (see Data ). Advise pregnant women and females of reproductive potential 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 In reproductive toxicity studies, administration of binimetinib to rats during the period of organogenesis resulted in maternal toxicity, decreased fetal weights and increased variations in ossification at doses ≥30 mg/kg/day (approximately 37 times the human exposure based on AUC at the recommended clinical dose of 45 mg twice daily). In pregnant rabbits, administration of binimetinib during the period of organogenesis resulted in maternal toxicity, decreased fetal body weights, an increase in malformations, and increased post-implantation loss, including total loss of pregnancy at doses ≥10 mg/kg/day (approximately 5 times the human exposure based on AUC at the recommended clinical dose of 45 mg twice daily). There was a significant increase in fetal ventricular septal defects and pulmonary trunk alterations at 20 mg/kg/day of binimetinib (less than 8 times the human exposure at the recommended clinical dose of 45 mg twice daily).

Pediatric Use The safety and effectiveness of MEKTOVI have not been established in pediatric patients.

Since binimetinib is 97% bound to plasma proteins, hemodialysis is likely to be ineffective in the treatment of overdose with MEKTOVI.