Alectinib

12.1 Mechanism of Action Alectinib is a tyrosine kinase inhibitor that targets ALK and RET. In nonclinical studies, alectinib inhibited ALK phosphorylation and ALK-mediated activation of the downstream signaling proteins STAT3 and AKT, and decreased tumor cell viability in multiple cell lines harboring ALK fusions, amplifications, or activating mutations. The major active metabolite of alectinib, M4, showed similar in vitro potency and activity. Alectinib and M4 demonstrated in vitro and in vivo activity against multiple mutant forms of the ALK enzyme, including some mutations identified in NSCLC tumors in patients who have progressed on crizotinib. In mouse models implanted with tumors carrying ALK fusions, administration of alectinib resulted in antitumor activity and prolonged survival, including in mouse models implanted intracranially with ALK-driven tumor cell lines.

1 INDICATIONS AND USAGE ALECENSA is a kinase inhibitor indicated for: adjuvant treatment in adult patients following tumor resection of anaplastic lymphoma kinase (ALK)-positive non-small cell lung cancer (NSCLC) (tumors ≥ 4 cm or node positive) as detected by an FDA-approved test. ( 1.1 ) treatment of adult patients with ALK-positive metastatic NSCLC as detected by an FDA-approved test. ( 1.2 ) 1.1 Adjuvant Treatment of Resected ALK-Positive Non-Small Cell Lung Cancer (NSCLC) ALECENSA is indicated as adjuvant treatment in adult patients following tumor resection of anaplastic lymphoma kinase (ALK)-positive non-small cell lung cancer (NSCLC) (tumors ≥ 4 cm or node positive), as detected by an FDA-approved test [see Dosage & Administration (2.1) ]. 1.2 Treatment of Metastatic ALK-Positive NSCLC ALECENSA is indicated for the treatment of adult patients with ALK-positive metastatic NSCLC as detected by an FDA-approved test [see Dosage & Administration (2.1) ] .

2 DOSAGE AND ADMINISTRATION 600 mg orally twice daily. Administer ALECENSA with food. ( 2.2 ) 2.1 Patient Selection Select patients with resectable tumors for the adjuvant treatment of NSCLC with ALECENSA based on the presence of ALK positivity in tumor tissue [see Indications and Usage (1.1) and Clinical Studies (14.1) ]. Select patients for the treatment of metastatic NSCLC with ALECENSA based on the presence of ALK positivity in tumor tissue or plasma specimens [see Indications and Usage (1.2) and Clinical Studies (14.2) ] . If ALK rearrangements are not detected in a plasma specimen, test tumor tissue if feasible. Information on FDA-approved tests for the detection of ALK rearrangements in NSCLC is available at http://www.fda.gov/CompanionDiagnostics. 2.2 Dosing and Administration The recommended dosage information for ALECENSA is provided in Table 1 . Table 1: ALECENSA Recommended Dosage and Duration of Treatment Indication Recommended Dosage of ALECENSA Duration Adjuvant treatment of resected NSCLC 600 mg orally twice daily with food [see Clinical Pharmacology (12.3) ] For a total of 2 years or until disease recurrence or unacceptable toxicity Metastatic NSCLC Until disease progression or unacceptable toxicity Swallow capsules whole, do not open or dissolve the contents of the capsule. If a dose of ALECENSA is missed or vomiting occurs after taking a dose of ALECENSA, take the next dose at the scheduled time. 2.3 Recommended Dosage for Hepatic Impairment The recommended dose of ALECENSA in patients with severe hepatic impairment (Child-Pugh C) is 450 mg orally twice daily [see Use in Specific Populations (8.7) and Clinical Pharmacology (12.3) ]. 2.4 Dose Modifications for Adverse Reactions The dose reduction schedule for ALECENSA is provided in Table 2 . Table 2: ALECENSA Dose Reduction Schedule Dose Reduction Schedule Dose Level Starting dose 600 mg taken orally twice daily First dose reduction 450 mg taken orally twice daily Second dose reduction 300 mg taken orally twice daily Discontinue if patients are unable to tolerate the 300 mg twice daily dose. Recommendations for dose modifications of ALECENSA in case of adverse reactions are provided in Table 3 . Table 3: ALECENSA Dose Modifications for Adverse Reactions Criteria ALT = alanine transaminase; AST = aspartate transaminase; ULN = upper limit of normal; ILD = interstitial lung disease; CPK = blood creatine phosphokinase ALECENSA Dose Modification ALT or AST elevation of greater than 5 times upper limit of normal (ULN) with total bilirubin less than or equal to 2 times ULN Temporarily withhold until recovery to baseline or to less than or equal to 3 times ULN, then resume at reduced dose as per Table 2 . ALT or AST elevation greater than 3 times ULN with total bilirubin elevation greater than 2 times ULN in the absence of cholestasis or hemolysis Permanently discontinue ALECENSA. Total bilirubin elevation of greater than 3 times ULN Temporarily withhold until recovery to baseline or to less than or equal to 1.5 times ULN, then resume at reduced dose as per Table 2 . Any grade treatment-related interstitial lung disease (ILD)/pneumonitis Permanently discontinue ALECENSA. Grade 3 renal impairment Temporarily withhold until serum creatinine recovers to less than or equal to 1.5 times ULN, then resume at reduced dose. Grade 4 renal impairment Permanently discontinue ALECENSA. Symptomatic bradycardia Withhold ALECENSA until recovery to asymptomatic bradycardia or to a heart rate of 60 bpm or above. If contributing concomitant medication is identified and discontinued, or its dose is adjusted, resume ALECENSA at previous dose upon recovery to asymptomatic bradycardia or to a heart rate of 60 bpm or above. If no contributing concomitant medication is identified, or if contributing concomitant medications are not discontinued or dose modified, resume ALECENSA at reduced dose (see Table 2 ) upon recovery to asymptomatic bradycardia or to a heart rate of 60 bpm or above. Bradycardia Heart rate less than 60 beats per minute (bpm) (life-threatening consequences, urgent intervention indicated) Permanently discontinue ALECENSA if no contributing concomitant medication is identified. If contributing concomitant medication is identified and discontinued, or its dose is adjusted, resume ALECENSA at reduced dose (see Table 2 ) upon recovery to asymptomatic bradycardia or to a heart rate of 60 bpm or above, with frequent monitoring as clinically indicated. Permanently discontinue ALECENSA in case of recurrence. CPK elevation greater than 5 times ULN Temporarily withhold until recovery to baseline or to less than or equal to 2.5 times ULN, then resume at same dose. CPK elevation greater than 10 times ULN or second occurrence of CPK elevation of greater than 5 times ULN Temporarily withhold until recovery to baseline or to less than or equal to 2.5 times ULN, then resume at reduced dose as per Table 2 . Hemolytic Anemia Withhold ALECENSA if hemolytic anemia is suspe

6 ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in other sections of the label: Hepatotoxicity [see Warnings and Precautions (5.1) ] Interstitial Lung Disease (ILD)/Pneumonitis [see Warnings and Precautions (5.2) ] Renal Impairment [see Warnings and Precautions (5.3) ] Bradycardia [see Warnings and Precautions (5.4) ] Severe Myalgia and Creatine Phosphokinase (CPK) Elevation [see Warnings and Precautions (5.5) ] Hemolytic Anemia [see Warnings and Precautions (5.6) ] Embryo-Fetal Toxicity [see Warnings and Precautions (5.7) ] The most common adverse reactions (incidence ≥20%) were hepatotoxicity, constipation, fatigue, myalgia, edema, rash and cough. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Genentech at 1-888-835-2555 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 pooled safety population described in the WARNINGS AND PRECAUTIONS reflect exposure to ALECENSA as a single agent at 600 mg orally twice daily in 533 patients in Studies NP28761, NP28673, ALEX and ALINA [see Clinical Studies (14) ]. Among 533 patients who received ALECENSA, 75% were exposed for 6 months or longer and 64% were exposed for greater than one year. In this pooled safety population, the most common (≥ 20%) adverse reactions were hepatotoxicity (41%), constipation (39%), fatigue (36%), myalgia (31%), edema (29%), rash (23%) and cough (21%). The most common (≥ 2%) Grade 3 or 4 laboratory abnormalities were increased CPK (6%), decreased hemoglobin (4.4%), increased ALT (4.2%), increased bilirubin (4.0%) and increased AST (3.4%). Adjuvant Treatment of Resected ALK-Positive NSCLC The safety of ALECENSA was evaluated in ALINA, a multi-center, open-label, randomized trial for the adjuvant treatment of patients with resected ALK-positive NSCLC [ see Clinical Studies (14.1) ]. At the time of DFS analysis, the median duration of exposure was 23.9 months for ALECENSA and 2.1 months for platinum-based chemotherapy. Serious adverse reactions occurred in 13% of patients treated with ALECENSA; the most frequent serious adverse reactions (≥ 1%) were pneumonia (3.9%), appendicitis (3.1%), and acute myocardial infarction (1.6%). Permanent discontinuation of ALECENSA due to an adverse event occurred in 5% of patients; the most frequent adverse reactions (≥ 1%) that led to treatment discontinuation were pneumonitis and hepatotoxicity. Dosage interruptions of ALECENSA due to an adverse reaction occurred in 27% of patients. Adverse reactions which required dosage interruption in ≥ 2% of patients included hepatotoxicity, increased blood CPK, COVID-19, myalgia, abdominal pain, and pneumonia. Dose reductions of ALECENSA due to an adverse reaction occurred in 26% of patients. Adverse reactions which required dose reductions in ≥ 2% of patients included hepatotoxicity, increased blood CPK, rash, bradycardia and myalgia. Table 4 and 5 summarize the common adverse reactions and laboratory abnormalities observed in ALINA. Table 4: Adverse Reactions (≥ 10%) in Patients Treated with ALECENSA in ALINA Adverse Reaction ALECENSA N=128 Chemotherapy N=120 All Grades (%) Grades 3-4 (%) All Grades (%) Grades 3-4 (%) Based on NCI CTCAE v5.0 Hepatobiliary System Disorders Hepatotoxicity Includes increased alanine aminotransferase, increased aspartate aminotransferase, increased bile acids, increased conjugated bilirubin, increased blood bilirubin, increased unconjugated blood bilirubin, increased gamma-glutamyltransferase, hepatotoxicity, hyperbilirubinemia, increased liver function test, ocular icterus and increased transaminases. 61 4.7 All events are Grade 3 13 0 Gastrointestinal Disorders Constipation 42 0.8 25 0.8 Abdominal pain Includes abdominal discomfort, abdominal pain, lower abdominal pain, upper abdominal pain, abdominal tenderness, epigastric discomfort and gastrointestinal pain. 13 0 10 1.7 Diarrhea Includes colitis and diarrhea. 13 0.8 9 1.7 Musculoskeletal Myalgia Includes muscle fatigue, muscular weakness, musculoskeletal chest pain, musculoskeletal stiffness and myalgia. 34 0.8 1.7 0 Infections and Infestations COVID-19 29 0 0.8 0 General Disorders and Administration Site Conditions Fatigue Includes asthenia and fatigue. 25 0.8 28 4.2 Edema Includes edema, face edema, localized edema, peripheral edema, face swelling and peripheral swelling. 16 0 1.7 0 Skin and Subcutaneous Tissue Disorders Rash Includes acneiform dermatitis, bullous dermatitis, drug eruption, eczema, rash, erythematous rash, maculo-papular rash, papular rash, seborrheic dermatitis, urticaria and xeroderma. 23 1.6 10 0 Respiratory System Disorders Cough Includes cough and productive cough. 20 0.8 3.3 0 Dyspnea Includes dyspnea and exertional dyspne