XALKORI Drug Interactions

SUMMARY PRODUCT INFORMATION

XALKORI (crizotinib) is indicated as monotherapy for use in patients with anaplastic lymphoma kinase (ALK)-positive locally advanced (not amenable to curative therapy) or metastatic non-small cell lung cancer (NSCLC).

XALKORI is indicated as monotherapy for use in patients with ROS1-positive locally advanced (not amenable to curative therapy) or metastatic NSCLC.

Efficacy in patients with ROS1-positive NSCLC was based on objective response rate (ORR) and Duration of Response (DR) in a single arm study with a limited number of patients (N=53) including 7 patients who are treatment naïve.

Using a validated ALK or ROS1 assay, assessment for ALK-positive or ROS1-positive locally advanced or metastatic NSCLC should be performed by laboratories with demonstrated proficiency in the specific technology being utilized. Improper assay performance can lead to unreliable test results (see CLINICAL TRIALS section).

There are no data available demonstrating improvement in overall survival with XALKORI.

Geriatrics (≥65 years of age):

Of the total ALK-positive NSCLC patients in clinical studies of XALKORI (n=1669), 16% were 65 years or older and 3.7% were 75 years or older. No overall differences in safety or efficacy was observed between these patients and patients <65 years. No starting dose adjustment is required for patients 65 years or older (see Special Populations). Of the 53 ROS1 positive NSCLC patients in single arm Study A8081001, 15 (28%) were 65 years or older.

Pediatrics (<18 years of age):

There is no indication for the use of XALKORI in the pediatric population. The effectiveness of XALKORI in pediatric patients with advanced relapsed/refractory solid tumors and anaplastic large-cell lymphoma (ALCL) has not been established (see WARNINGS AND PRECAUTIONS, Special Populations, Pediatrics).

Patients with congenital long QT syndrome or with a persistent Fridericia-corrected electrocardiogram interval (QTcF) of ≥500 msec (see WARNINGS AND PRECAUTIONS, ADVERSE REACTIONS).

Patients with a known hypersensitivity to the active substance, crizotinib, or to any ingredient in the formulation or component of the container. For a complete listing, see the DOSAGE FORMS, COMPOSITION AND PACKAGING section of the Product Monograph.

General

ALK or ROS1 Testing

Prior to receiving therapy with XALKORI, patients must be tested and confirmed for either ALK-positive or ROS1-positive locally advanced or metastatic NSCLC using a validated ALK or ROS1 assay, respectively (see CLINICAL TRIALS section). Assessment for ALK-positive or ROS1-positive locally advanced or metastatic NSCLC should be performed by laboratories with demonstrated proficiency in the specific technology being utilized. Improper assay performance can lead to unreliable test results.

Drug Interactions

Crizotinib is a substrate and inhibitor of CYP3A. The concurrent use of strong CYP3A inhibitors such as ketoconazole may increase crizotinib plasma concentration and should be avoided. The concurrent use of strong CYP3A inducers such as rifampin may decrease crizotinib plasma concentration and should be avoided. The concurrent use of CYP3A substrates with narrow therapeutic indices and associated with life-threatening arrhythmias such as pimozide should be avoided (see DOSAGE AND ADMINISTRATION and DRUG INTERACTIONS).

Missed Dose

If a dose of crizotinib is missed, then it should be taken as soon as possible. If it is less than 6 hours until the next dose, then the patient should not take the missed dose. Patients should not take 2 doses at the same time to make up for a missed dose.

Effects on Ability to Drive and Use Machinery

Vision disorder, most commonly visual impairment, photopsia, vision blurred, and vitreous floaters, was experienced by 63% of patients in clinical trials of patients with ALK-positive or ROS1-positive NSCLC. Caution should be exercised when driving or operating machinery by patients who experience vision disorders (see DRUG INTERACTIONS).

Carcinogenesis and Mutagenesis

Crizotinib was genotoxic in non-clinical studies (see PART II, TOXICOLOGY; Carcinogenesis, Mutagenesis, Phototoxicity, Reproductive and Developmental Toxicity).

Carcinogenicity studies with crizotinib have not been performed.

Cardiovascular

Bradycardia

Symptomatic bradycardia (e.g. syncope, dizziness, hypotension) can occur in patients receiving XALKORI. In clinical trials of patients with ALK-positive or ROS1-positive NSCLC, bradycardia occurred in 13% of patients treated with XALKORI. A total of 16% of patients with at least 1 postbaseline vital sign assessment had a heart rate less than 50 beats per minute. In Study A8081014, Grade 3 syncope occurred in 0.6% of XALKORI-treated patients and in 1.2% of chemotherapy-treated patients. In Study A8081007, Grade 3 syncope occurred in 3.5% of XALKORI-treated patients and in none of the chemotherapy-treated patients.

The full effect on reduction of heart rate may not develop until several weeks after start of treatment (see WARNINGS AND PRECAUTIONS, Monitoring and Laboratory Tests; ADVERSE REACTIONS, Electrocardiography and Haemodynamics). Caution should be exercised in patients with a low heart rate at baseline (<60 beats per minute), a history of syncope or arrhythmia, sick sinus syndrome, sinoatrial block, atrioventricular (AV) block, ischemic heart disease, or congestive heart failure. Avoid using crizotinib in combination with other bradycardic agents (e.g., beta-blockers, non-dihydropyridine calcium channel blockers such as verapamil and diltiazem, clonidine, digoxin) to the extent possible, due to the increased risk of symptomatic bradycardia. Monitor heart rate and blood pressure regularly (see Monitoring and Laboratory Tests).

Permanently discontinue for life-threatening symptomatic bradycardia due to XALKORI. If contributing concomitant medication is identified and discontinued, hold XALKORI until recovery to asymptomatic bradycardia or to a heart rate of 60 bpm or above. Dose modification is not required in cases of asymptomatic bradycardia. For management of patients who develop symptomatic bradycardia, see DOSAGE AND ADMINISTRATION and Monitoring and Laboratory Tests.

QT Interval Prolongation

Prolongation of corrected QT interval without accompanying arrhythmia has been observed (see Electrocardiography and Hemodynamics, ADVERSE REACTIONS).

Pharmacokinetic/pharmacodynamic modeling indicated a concentration-dependent increase in QTcF and decrease in heart rate (HR) (see Electrocardiography and Hemodynamics, ADVERSE REACTIONS). In clinical trials of patients with ALK-positive or ROS1-positive NSCLC, electrocardiogram QT prolonged (all grades) was observed in 3.7% patients. QTcF greater than or equal to 500 msec on at least 2 separate ECGs was observed in 2.1% of patients with at least 1 postbaseline ECG assessment and a maximum increase from baseline QTcF greater than 60msec was observed in 5.0% of patients with a baseline and at least 1 postbaseline ECG assessment. XALKORI should be administered with caution to patients who have a history of, or a predisposition for QTc prolongation, or who are taking medications that are known to prolong the QT interval. When using XALKORI, periodic monitoring of electrocardiogram (ECG) QTc and electrolytes should be considered. In the event of a QTc ≥500 msec (Grade 3), dosing with XALKORI should be withheld until recovery to Grade ≤1 (≤470 msec), then resumed at a reduced dose of 200 mg twice daily. Permanent discontinuation of XALKORI is recommended in the event of a Grade 4 QTc prolongation (≥500 msec [or >60 msec change from baseline] and Torsade de Pointes or polymorphic ventricular tachycardia, or signs/symptoms of serious arrhythmias) (see Dose Modification and ADVERSE REACTIONS Sections).

QTc prolongation may lead to an increased risk of ventricular arrhythmias including Torsade de Pointes. Torsade de Pointes is a polymorphic ventricular tachyarrhythmia. Generally, the risk of Torsade de Pointes increases with the magnitude of QTc prolongation produced by the drug. Torsade de Pointes may be asymptomatic or experienced by the patient as dizziness, palpitations, syncope, or seizures. If sustained, Torsade de Pointes can progress to ventricular fibrillation and sudden cardiac death. Treatment with XALKORI is not recommended in patients with congenital long QT syndrome, or who are taking medicinal products known to prolong the QT interval (see DRUG INTERACTIONS). Hypokalemia, hypomagnesemia, and hypocalcemia must be corrected prior to XALKORI administration.

Particular care should be exercised when administering XALKORI to patients who are suspected to be at an increased risk of experiencing Torsade de Pointes during treatment with a QTc-prolonging drug.

Risk factors for Torsade de Pointes in the general population include, but are not limited to, the following: female gender; age ≥65 years; baseline prolongation of the QT/QTc interval; presence of genetic variants affecting cardiac ion channels or regulatory proteins, especially congenital long QT syndromes; family history of sudden cardiac death at <50 years of age; cardiac disease; history of arrhythmias; electrolyte disturbances (e.g., hypokalemia, hypomagnesemia, hypocalcemia); bradycardia; acute neurological events (e.g., intracranial or subarachnoid haemorrhage, stroke, intracranial trauma); nutritional deficits; diabetes mellitus; and autonomic neuropathy.

When drugs that prolong the QT/QTc interval are prescribed, healthcare professionals should counsel their patients concerning the nature and implications of the ECG changes, underlying diseases and disorders that are considered to represent risk factors, demonstrated and predicted drug-drug interactions, symptoms suggestive of arrhythmia, risk management strategies, and other information relevant to the use of the drug.

Crizotinib is a functional antagonist of sodium, potassium, and calcium currents (see DETAILED PHARMACOLOGY; Safety Pharmacology).

Thrombotic Events

Deep vein thrombosis was observed in 4.2% of patients in clinical trials of patients with ALK-positive or ROS1-positive NSCLC. Grade 5 treatment-related adverse events of disseminated intravascular coagulation and deep vein thrombosis in 2 patients (<1%) (1 patient each) (see ADVERSE REACTIONS). XALKORI should be used with caution in patients who are at increased risk of thrombotic events. XALKORI has not been studied in patients who have had myocardial infarction, severe/unstable angina, coronary/peripheral artery bypass graft, congestive heart failure, or cerebrovascular accident including transient ischemic attack within the previous 3 months.

Cardiac Dysfunction

In clinical studies with XALKORI and during post marketing surveillance, severe, life-threatening, or fatal adverse reactions of cardiac failure were reported. Patients, with or without pre-existing cardiac disorders, receiving XALKORI, should be monitored for signs and symptoms of heart failure such as edema, dyspnea, rapid weight gain from fluid retention and chest pain. XALKORI has been associated with edema and dyspnea in clinical trials (see ADVERSE REACTIONS). Dosing interruption, dose reduction, or discontinuation should be considered as appropriate if such symptoms are observed. Consideration should be given to the use of cardiac imaging methodologies to monitor cardiac function during XALKORI treatment.

Gastrointestinal

Nausea (57%), diarrhea (54%), vomiting (51%), and constipation (43%) were the most commonly reported gastrointestinal events in patients in clinical trials of NSCLC (see ADVERSE REACTIONS). Most events were mild to moderate in severity. Median times to onset for nausea and vomiting was 3 days and declined in frequency after 3 weeks of treatment. GI events were manageable through the use of dosing interruption, dose reduction, and/or standard medical therapy. Supportive care may include the use of antiemetic medications. In clinical trials, the most commonly used antiemetic medications were ondansetron and prochlorperazine. Median times to onset for diarrhea and constipation were 13 and 17 days, respectively. Supportive care for diarrhea and constipation may include the use of standard antidiarrheal and laxative medications, respectively.

Hepatic/Biliary/Pancreatic

Drug-induced hepatotoxicity, including hepatic failure, with fatal outcome has occurred in 2 (0.1%) of the 1722 patients treated with XALKORI in clinical trials of patients with ALK-positive or ROS1-positive NSCLC. Concurrent elevations in ALT and/or AST ≥3 x ULN and total bilirubin ≥2 x ULN without significant elevations of alkaline phosphatase (Hy’s Law) have been observed in 8 (<1%) of patients treated with XALKORI in clinical trials. Grade 3 or 4 ALT or AST elevations were observed in 11% and 6% of patients, respectively. Seventeen (1%) patients required permanent discontinuation from treatment associated with elevated transaminases. Transaminase elevations generally occurred within the first 2 months of XALKORI treatment.

Monitor with liver function tests including ALT, AST, and total bilirubin every 2 weeks during the first 2 months of treatment, then once a month and as clinically indicated, with more frequent repeat testing for Grades 2, 3 or 4 elevation in patients who develop transaminase elevations (see DOSAGE AND ADMINISTRATION and ADVERSE REACTIONS).

Neurologic

All-causality neuropathy (motor and sensory, see ADVERSE REACTIONS) was experienced by 25% of patients treated with XALKORI and was mainly Grade 1 or 2 in severity. Median time of onset for neuropathy was 91 days. Neuropathy was effectively managed by dosing interruption with or without dose reduction. Dizziness (25%) and dysgeusia (21%) were also commonly reported in these studies, and were primarily Grade 1 in severity.

Cerebral haemorrhage was reported in 7 (0.4%) of 1722 patients with ALK-positive or ROS1-positive NSCLC. Three cases were fatal. CNS haemorrhage has also been reported in 2 patients treated with crizotinib in a Phase 1/2 trial in pediatric patients, both of whom had previously treated primary intracranial tumors (not an authorized indication), 1 of whom had a fatal outcome.

Neutropenia and leukopenia

In clinical studies with crizotinib in patients with either ALK-positive or ROS1-positive NSCLC, Grade 3 or 4 neutropenia has been very commonly (12%) reported. Grade 3 or 4 leukopenia has been commonly (3%) reported (see ADVERSE REACTIONS). Less than 0.5% of patients experienced febrile neutropenia in clinical studies with crizotinib. Complete blood counts including differential white blood cell counts should be monitored as clinically indicated, with more frequent repeat testing if Grade 3 or 4 abnormalities are observed, or if fever or infection occurs (see DOSAGE AND ADMINISTRATION).

Ophthalmologic

Vision Disorder

Vision disorder, most commonly visual impairment, photopsia, vision blurred, and vitreous floaters, was experienced by 63% of patients treated with XALKORI in clinical trials of patients with either ALK-positive or ROS1-positive advanced NSCLC. Of the 1084 patients who experienced vision disorder, 95% of these patients had Grade 1 visual adverse reactions. There were 5 (0.3%) of patients with a Grade 3 adverse reaction and 1 (0.1%) of patient with a Grade 4 adverse reaction. Seven (0.4%) of patients had a dose interruption and 2 (0.1%) of patients had a dose reduction associated with vision disorder. There were no permanent treatment discontinuations associated with vision disorder for any of the 1722 patients treated with crizotinib.

Based on the Visual Symptom Assessment Questionnaire (VSAQ-ALK), patients treated with XALKORI in Studies A8081007 and A8081014 reported a higher incidence of visual disturbances compared to patients treated with chemotherapy. The onset of vision disorder generally was within the first week of drug administration. The majority of patients on the XALKORI arms in Studies A8081007 and A8081014 (>50%) reported visual disturbances which occurred at a frequency of 4-7 days each week, lasted up to 1 minute, and had mild or no impact (scores 0 to 3 out of a maximum score of 10) on daily activities as captured in the VSAQ-ALK questionnaire.

Ophthalmological evaluation should be considered if vision disorder persists or worsens in severity. Caution should be exercised when driving or operating machinery by patients who experience vision disorder (see TOXICOLOGY).

Severe Visual Loss

In clinical trials of patients with ALK-positive or ROS1-positive NSCLC, the incidence of Grade 4 vision loss was 0.2% (4/1722). Optic atrophy and optic nerve disorder have been reported as potential causes of vision loss.

Discontinue XALKORI in patients with new onset of severe visual loss (best corrected vision less than 20/200 in one or both eyes). Perform an ophthalmological evaluation consisting of best corrected visual acuity, retinal photographs, visual fields, optical coherence tomography (OCT) and other evaluations as appropriate for new onset of severe visual loss. There is insufficient information to characterize the risks of resumption of XALKORI in patients with a severe visual loss; a decision to resume XALKORI should consider the potential benefits to the patient.

Renal

Renal cyst was most commonly complex, and has been reported by 3% of patients treated with XALKORI in clinical trials of patients with ALK-positive or ROS1-positive advanced NSCLC. There were no reports of clinically relevant abnormal urinalyses or renal impairment in these cases, although local invasion beyond the kidney was observed in some patients. The significance is unknown (see ADVERSE REACTIONS). Renal cyst has been associated with permanent discontinuation in 3 (0.2%) patients. Periodic monitoring with imaging and urinalysis should be considered in patients who develop renal cysts.

Respiratory

Interstitial Lung Disease/Pneumonitis

Severe, life-threatening or fatal interstitial lung disease (ILD)/pneumonitis can occur in patients treated with XALKORI. In ALK-positive and ROS1-positive clinical trials, 2.9% of XALKORI-treated patients had any grade ILD/pneumonitis, 1.1% had Grade 3 or 4 ILD/pneumonitis, and 8 patients (0.5%) had fatal cases of ILD/pneumonitis. These cases generally occurred within 3 months after the initiation of treatment. Patients should be monitored for pulmonary symptoms indicative of ILD/pneumonitis. Other potential causes of ILD/pneumonitis should be excluded, and XALKORI should be interrupted during these investigations. XALKORI should be permanently discontinued in patients diagnosed with treatment-related ILD/pneumonitis (see DOSAGE AND ADMINISTRATION, Dose Modifications and ADVERSE REACTIONS sections).

Sexual Function/Reproduction

Fertility

Based on reproductive organ findings in toxicology studies, male and female fertility may be impaired by treatment with crizotinib (see PART II, TOXICOLOGY section).

Special Populations

Pregnant Women

There are no adequate and well-controlled studies in pregnant women using XALKORI. XALKORI may cause fetal harm when administered to a pregnant woman. Crizotinib was shown to be fetotoxic but not teratogenic in pregnant rats and rabbits (see PART II, TOXICOLOGY; Carcinogenesis, Mutagenesis, Phototoxicity, Reproductive and Developmental Toxicity).

Women of childbearing potential should be advised to avoid becoming pregnant while receiving XALKORI. Adequate contraceptive methods should be used during therapy, and for at least 90 days after completing therapy.

If XALKORI is used during pregnancy, or if the patient or their partner becomes pregnant while receiving XALKORI, then the patient or their partner should be apprised of the potential hazard to the fetus or potential risk for loss of the pregnancy.

Nursing Women

There are no adequate and well-controlled studies in nursing women using XALKORI. It is not known whether crizotinib and its metabolites are excreted in human milk. Because many drugs are commonly excreted in human milk, and because of the potential harm to nursing infants due to exposure to crizotinib, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother (see PART II, TOXICOLOGY section).

Male Patients

Adequate contraceptive methods should be used by men during therapy, and for at least 90 days after completing therapy. If the patient’s partner becomes pregnant while receiving XALKORI, then the patient and his partner should be apprised of the potential hazard to the fetus or potential risk for loss of the pregnancy.

Pediatrics (<18 years of age)

The safety and efficacy of XALKORI in pediatric patients have not been established. In toxicology studies, decreased bone formation in growing long bones was observed in immature rats (see PART II, TOXICOLOGY). Other toxicities of potential concern to pediatric patients have not been evaluated in juvenile animals.

Limited data are available on the use of XALKORI in pediatric patients. XALKORI has been studied in a total of 64 pediatric patients (range: 2.6 – 22 years) with advanced relapsed/refractory solid tumors or ALCL in a phase 1/2 study to explore the pharmacokinetics (PK), pharmacodynamics (PD), safety profile/tolerability and anti-tumor activity. The effectiveness of XALKORI in this pediatric population has not been established. CNS haemorrhage was reported in 2 patients in this trial, both of whom had previously treated primary intracranial tumors (not an authorized indication), 1 of whom had a fatal outcome.

Geriatrics (≥65 years of age)

Of the 171 XALKORI treated ALK-positive NSCLC patients in Study A8081014, 22 (13%) were 65 years or older, and 26 (24%) of the 109 patients who crossed over from chemotherapy to receive XALKORI were 65 years or older. Of the 172 XALKORI-treated ALK-positive NSCLC patients in Study A8081007, 27 (16%) were 65 years or older. Of the 154 patients in Study A8081001, 22 (14%) were 65 years or older. Of the 1063 ALK-positive NSCLC patients in Study A8081005, 173 (16%) were 65 years or older. For ALK-positive NSCLC patients, the frequency of adverse reactions was generally similar for XALKORI-treated patients less than 65 years of age and patients 65 years or older, (though the number of patients in the >65 group was small), with the exception of edema and constipation, which were reported with greater frequency in Study A8081014 among patients 65 years or older. Of the 53 ROS1‑positive NSCLC patients in single arm Study A8081001, 15 (28%) were 65 years of older. The frequency of adverse reactions was generally similar for XALKORI-treated patients less than 65 years of age and patients 65 years or older, with the exception of treatment-related Dysgeusia and Nausea, which were reported with greater frequency in patients 65 years or older. Based on existing data, no overall differences in safety or efficacy was observed between these patients and patients <65 years. No starting dose adjustment is required for patients 65 years or older.

Hepatic Impairment

Treatment with XALKORI should be used with caution in patients with hepatic impairment. Based on a clinical study, no starting dose adjustment of XALKORI is recommended for patients with mild hepatic impairment (either AST > Upper Limit of Normal (ULN) and total bilirubin ≤ULN or any AST and total bilirubin >ULN but ≤1.5×ULN). The starting XALKORI dose for patients with moderate hepatic impairment (any AST and total bilirubin >1.5×ULN and ≤3×ULN) is recommended to be 200 mg twice daily. The starting XALKORI dose for patients with severe hepatic impairment (any AST and total bilirubin >3×ULN) is recommended to be 250 mg once daily. (see DOSAGE AND ADMINISTRATION and ACTION AND CLINICAL PHARMACOLOGY, Pharmacokinetics).

Renal Impairment

Based on a PK study, the starting dose of XALKORI should be reduced by 50% (250 mg once daily) in patients with severe renal impairment (CLcr < 30 mL/min) not requiring peritoneal dialysis or hemodialysis. No starting dose adjustment is recommended for patients with mild (CLcr 60-89mL/min) or moderate (CLcr 30-59 mL/min)renal impairment (see DOSAGE AND ADMINISTRATION and ACTION AND CLINICAL PHARMACOLOGY Special Populations and Conditions, Renal Impairment).

No data available for patients with severe renal impairment requiring peritoneal dialysis or hemodialysis (CLcr < 30 mL/min) (see WARNINGS AND PRECAUTIONS, Serious Warnings and Precautions).

Monitoring and Laboratory Tests

ALK or ROS1 Testing

Prior to receiving therapy with XALKORI, patients must be tested and confirmed for ALK-positive or ROS1-positive locally advanced or metastatic NSCLC using a validated assay (see CLINICAL TRIALS section). Assessment for ALK-positive or ROS1-positive locally advanced NSCLC should be performed by laboratories with demonstrated proficiency in the specific technology being utilized. Improper assay performance can lead to unreliable test results.

Renal Monitoring

Creatinine levels should be assessed at baseline and monitored periodically during treatment with XALKORI.

Periodic monitoring with imaging and urinalysis should be considered in patients who develop renal cysts.

Liver Function Test Monitoring

Liver function tests including ALT and total bilirubin should be performed before XALKORI administration and monitored every 2 weeks during the first 2 months of treatment, then once a month and as clinically indicated, with more frequent repeat testing for Grades 2, 3 or 4 elevation. In patients who develop transaminase elevations, consult Dose Modification section (see DOSAGE AND ADMINISTRATION section).

Cardiac Safety Monitoring

Patients receiving XALKORI should be monitored for heart rate and blood pressure. ECG evaluations should be performed at baseline prior to initiating therapy with XALKORI and should be repeated periodically during treatment with XALKORI, to monitor for decreased heart rate and QTc prolongation (see WARNINGS AND PRECAUTIONS, Cardiovascular; ADVERSE REACTIONS, Electrocardiography and Haemodynamics; DRUG INTERACTIONS). Consultation with a cardiologist should be considered when assessing the QT interval to ensure appropriate treatment decisions.

Electrolyte levels (calcium, potassium, and magnesium) should be assessed at baseline and monitored periodically during treatment with XALKORI, particularly in patients at risk for these electrolyte abnormalities (see WARNINGS AND PRECAUTIONS, Cardiovascular; DRUG INTERACTIONS). Hypocalcemia, hypokalemia, and hypomagnesemia should be corrected prior to XALKORI administration.

Hematologic Monitoring

Complete blood counts including differential white blood cell counts should be monitored as clinically indicated, with more frequent repeat testing if Grade 3 or 4 abnormalities are observed, or if fever or infection occurs (see DOSAGE AND ADMINISTRATION).

Adverse Drug Reaction Overview

The data described below reflect exposure to XALKORI in 1669 patients with ALK-positive advanced NSCLC who participated in randomized Phase 3 studies (Study A8081007 and A8081014) or in single-arm trials (Studies A8081001 and A8081005), and in 53 patients with ROS1-positive advanced NSCLC who participated in single arm Study 1001, for a total of 1722 patients. These patients received a starting oral dose of 250 mg taken twice daily continuously.

The most serious adverse drug reactions in 1722 patients with either ALK-positive or ROS1-positive advanced NSCLC are hepatotoxicity, ILD/pneumonitis, and QT interval prolongation (see WARNINGS AND PRECAUTIONS). The most common all-causality adverse events (≥10%) of XALKORI are vision disorder, nausea, diarrhea, vomiting, edema, constipation, elevated transaminases, fatigue, decreased appetite, upper respiratory infection, dizziness, neuropathy, cough, dyspnea, neutropenia, dysgeusia, abdominal pain, headache, pyrexia, chest pain, back pain, anemia, leukopenia, stomatitis, asthenia, rash, bradycardia, insomnia, pain in extremity, disease progression, and arthralgia.

Treatment-emergent all-causality bradycardia was experienced by 219 (13%) of 1722 patients treated with XALKORI in clinical trials of patients with either ALK-positive or ROS1-positive advanced NSCLC. The majority of these cases were Grade 1 or 2 in severity. A total of 259 (16%) of 1666 patients with at least 1 postbaseline vital sign assessment had a pulse heart rate <50 bpm.

Across all XALKORI clinical studies, approximately 2100 patients have received XALKORI at a starting dose of 250 mg twice daily across various tumor types, the most common being NSCLC. The safety profile for these patients was consistent with that observed for the 1722 patients with either ALK-positive or ROS1-positive NSCLC.

Clinical Trial Adverse Drug Reactions

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.

Previously Untreated ALK-Positive Metastatic NSCLC - Study A8081014

The data in Table 1 are derived from 343 patients with ALK-positive metastatic NSCLC who had not received previous systemic treatment for advanced disease who enrolled in a randomized, multicenter, open-label, active-controlled trial (Study A8081014).

The safety analysis population in Study A8081014 included 171 patients who received XALKORI and 169 patients who received chemotherapy (91 pemetrexed/ cisplatin or 78 pemetrexed/carpboplatin).

The median duration of study treatment was 10.9 months for patients in the XALKORI arm and 4.1 months for patients in the chemotherapy arm (a maximum of 6 cycles was permitted). Median duration of treatment was 5.2 months for patients who received XALKORI after cross over from chemotherapy. Across the 343 patients who were randomized to study treatment (340 received at least 1 dose of study treatment), the median age was 53 years; 87% of patients in the XALKORI arm and 81% of patients in the chemotherapy arm were younger than 65 years. A total of 61% of patients on XALKORI and 63% of chemotherapy patients were female. Forty-five percent (45%) of XALKORI-treated patients and 47% of chemotherapy-treated patients were Asian.

The most frequent (≥10%) all-causality ADRs for patients treated with XALKORI were vision disorder, diarrhea, nausea, edema, vomiting, constipation, elevated transaminases, decreased appetite, fatigue, dysgeusia, neutropenia, neuropathy, dizziness, bradycardia, dyspepsia, and rash.

The most common (≥1%) grade 3/4 all-causality ADRs for patients treated with XALKORI were elevated transaminases, neutropenia, fatigue, decreased appetite, diarrhea, vomiting, constipation, nausea, electrocardiogram QT prolonged, leukopenia, neuropathy, and bradycardia.

Serious adverse events were reported in 58 patients (33.9%) treated with XALKORI and 47 patients (27.8%) in the chemotherapy arm. The most frequent serious adverse events reported in patients treated with XALKORI were dyspnea (4.1%) and pulmonary embolism (2.9%). Fatal adverse events in XALKORI-treated patients occurred in 2.3% patients, consisting of septic shock, acute respiratory failure, and diabetic ketoacidosis.

Dose reductions due to adverse reactions were required in 11 (6.4%) of XALKORI-treated patients. The most frequent adverse reactions that led to dose reduction in these patients were nausea (1.8%) and elevated transaminases (1.8%).

Dose interruption/temporary discontinuation occurred in 44.3% of patients. The most frequent adverse events that led to dose interruption/temporary discontinuation were neutropenia (8.2%), alanine aminotransferase (6.0%), vomiting (4.8%), nausea (4.1%), aspartate aminotransferase increased (3.8%), pneumonia (3.2%), dyspnea (2.6%), neutrophil count decreased (2.5%), fatigue (2.1%), leukopenia (1.7%), oedema peripheral (1.7%), diarrhoea (1.4%), pyrexia (1.3%), decreased appetite (1.1%), and abdominal pain upper (1.0%).

In this study, 4.1% of patients permanently discontinued XALKORI treatment due to disease progression and 8.2% due to an adverse event. The most frequent adverse reactions that led to permanent discontinuation in XALKORI-treated patients were elevated transaminases (1.2%), hepatotoxicity (1.2%), and ILD (1.2%).

Table 1 summarizes common adverse events experienced by patients in both the XALKORI and chemotherapy arms of study A8081014.

Additional adverse events that were observed during the clinical trial included upper respiratory infection (32%), abdominal pain (26%), pyrexia (19%), pain in extremity (16%), asthenia (13%), dysphagia (10%), anemia (8%), and stomatitis (6%).

Previously Treated ALK-Positive Metastatic NSCLC (Study A8081007)

The safety analysis population in Study A8081007 included 172 patients who received XALKORI and 171 patients who received chemotherapy (99 pemetrexed, 72 docetaxel). The median duration of study treatment was 11 months for patients on XALKORI and 3 months for patients on chemotherapy).

The most frequent (≥10%) all-causality ADRs for patients treated with crizotinib were vision disorder, edema, diarrhea, nausea, vomiting, constipation, elevated transaminases, decreased appetite, neutropenia, fatigue, dizziness, dysgeusia, neuropathy, leukopenia, and rash.

The most common (≥1%) grade 3/4 all-causality ADRs for patients treated with XALKORI were elevated transaminases, neutropenia, leukopenia, syncope, pneumonia, electrocardiogram QT prolonged, decreased appetite, constipation, nausea, vomiting, and fatigue.

Serious adverse events occurred in 76 (44%) patients on XALKORI, the most common of which were disease progression, pneumonia, pulmonary embolism and dyspnoea and 42 (25%) patients on chemotherapy, the most common of which was febrile neutropenia. Fatal adverse events in XALKORI-treated patients occurred in 6.4% patients, consisting of arrhythmia, interstitial lung disease, pneumonitis, dyspnea, sepsis/acute respiratory distress syndrome, cognitive disorder, death, pneumonia, pulmonary embolism, respiratory failure, sudden death, pericardial effusion, tumor hemorrhage.

Dosing interruptions due to adverse events occurred in 76 (44%) patients on XALKORI, the most common of which were neutropenia, ALT/AST increased, nausea and vomiting, and 28 (16%) patients on chemotherapy, the most common of which were fatigue and dizziness. Dose reductions due to adverse events occurred in 30 (17%) patients on XALKORI, the most common of which were elevated transaminases, electrocardiogram QT prolonged and neutropenia, and 25 (15%) patients on chemotherapy, the most common of which were neutropenia, fatigue and mucosal inflammation.

In this study, 9.9% of patients permanently discontinued XALKORI treatment due to progression and 13.4% due to an adverse event. The most frequent adverse reactions that led to permanent discontinuation in XALKORI-treated patients were interstitial lung disease/pneumonitis (2.3%), dyspnea (1.7%), elevated transaminases (2.4%), pulmonary embolism (1.2%), and pneumonia (1.2%).

Table 2 compares adverse drug reactions, regardless of causality, experienced by patients in the XALKORI and chemotherapy arms of Study

The following treatment-related Serious Adverse Events (SAEs) were reported in XALKORI clinical studies:

Common Clinical Trial Treatment-Related SAEs (≥1% to <10%):

Vomiting, Pneumonia, Alanine aminotransferase increased, Aspartate aminotransferase increased, Electrocardiogram QT prolonged, Interstitial lung disease

Uncommon Clinical Trial Treatment-Related SAEs (≥0.1% to <1%):

Febrile neutropenia, Neutropenia, Arrhythmia, Cardiac arrest, Abdominal pain upper, Diarrhoea, Nausea, Fatigue, Pyrexia, hepatic failure, Hepatitis, Decreased appetite, Hypokalaemia, Syncope, Renal cyst, Acute respiratory failure, Pneumonitis, Pulmonary artery thrombosis, Pulmonary thrombosis, Drug eruption, Pelvis venous thrombosis

Single-Arm Studies in ALK-Positive Advanced NSCLC (Studies A8081001 and A8081005)

The safety analysis population in Study A8081005 included 1063 patients with ALK-positive metastatic NSCLC who received XALKORI in a clinical trial. The median duration of treatment was 45 weeks. Dosing interruptions and dose reductions due to adverse events occurred in 476 (45%) patients and 192 (18%) of patients, respectively, in Study A8081005. The rate of adverse events resulting in permanent discontinuation was 202 (19%) patients. The most adverse reactions (≥25%) were vision disorder (60%), diarrhea (52%), nausea (56%), vomiting (53%), constipation (44%), edema (49%), elevated transaminases (30%), decreased appetite (30%), fatigue (30%), cough (27%), neuropathy (26%) and dyspnea (25%). The most common Grade 3 or 4 treatment-related adverse events (≥3%) were neutropenia, elevated transaminases and fatigue, hypophosphatemia, and leukopenia. The potentially serious adverse reactions of pneumonitis and QT interval prolongation are discussed in WARNINGS AND PRECAUTIONS.

The safety analysis population in Study A8081001 included 154 patients in the ALK rearranged expansion cohort who received XALKORI. The median duration of treatment was 57 weeks. Dosing interruptions and dose reductions due to adverse events occurred in 73 (47%) patients, most common of which were ALT increased, pyrexia and pneumonia, and 18 (12%) patients, most common of which was ALT increased, respectively. The rate of adverse events resulting in permanent discontinuation was 24 (16%), most common of which was pneumonitis. The most common treatment-related adverse reactions (≥ 25%) are consistent with Studies A8081007 and A8081005, and were vision disorder, nausea, diarrhea, vomiting, edema, constipation, dizziness, fatigue, decreased appetite, rash, and neuropathy. The most common Grade 3 or 4 adverse reactions (>3%) in Study A8081001 were elevated transaminases, neutropenia, syncope, nausea, vomiting, edema, fatigue, and neuropathy.

Six unexplained deaths (<1%) occurred during treatment with XALKORI in these studies.

The following treatment-related Serious Adverse Events (SAEs) were reported in XALKORI clinical studies:

Common Clinical Trial Treatment-Related SAEs (≥1% to <10%)

The following treatment-related SAE was reported with XALKORI treatment at a common frequency (≥1% to <10%): pneumonitis (2%).

Uncommon Clinical Trial Treatment-Related SAEs (≥0.1% to <1%)

The following treatment-related SAEs were reported with XALKORI treatment at an uncommon frequency (≥0.1% to <1%): alanine aminotransferase increased (0.4%), constipation (0.4%), death (0.4%), dyspnoea (0.4%), febrile neutropenia (0.4%), haematoma (0.4%), hepatic enzyme increased (0.4%), hypokalaemia (0.4%), hyponatraemia (0.4%), infection (0.4%), liver function test abnormality (0.4%), oedema peripheral (0.4%), oesophageal ulcer (0.4%), pneumonia (0.4%), renal abscess (0.4%), and supraventricular tachycardia (0.4%).

There were no clinical trial SAEs that occurred at a rare frequency (≤0.1%).

Single-Arm Study in ROS1-Positive Advanced NSCLC (ROS1 Rearranged Expansion Cohort from Study A8081001)

The safety analysis population in Study A8081001 included 53 patients with ROS1 positive NSCLC who received XALKORI. The median duration of treatment was 101 weeks. All-causality adverse events associated with dosing interruptions and dose reductions occurred in 24 (45%) patients and 6 (11%) patients, respectively. All-causality adverse events associated with permanent discontinuation from treatment occurred in 4 (8%) patients with ROS1-positive NSCLC in Study A8081001. The most common adverse reactions (≥25%) in patients with ROS1-positive NSCLC from Study A8081001 were consistent with those seen in patients with ALK-positive advanced NSCLC and were vision disorder, nausea, edema, vomiting, diarrhea, constipation, dizziness, elevated transaminases, fatigue, neuropathy, bradycardia, and rash. The most common Grade 3 or 4 adverse reactions (>3%) were neutropenia, syncope, vomiting, elevated transaminases, and electrocardiogram QT prolonged.

Electrocardiography and Haemodynamics

ECG evaluations were performed in all patients who received XALKORI 250 mg twice daily. Serial ECGs in triplicate were collected following a single dose and at steady state to evaluate the effect of XALKORI on QT intervals. Crizotinib 250 mg twice daily was associated with a statistically significant decrease in heart rate during steady-state treatment (see ADVERSE REACTIONS). At 6 hours post-dosing on Day 22 of treatment, heart rate was decreased by mean 15.9 beats per minute (90% CI: -17.9, -13.8) in 105 ALK-positive NSCLC patients in Study A8081005.

XALKORI 250 mg twice daily was also associated with a statistically significant prolongation of the QTcF interval (Fridericia-corrected QT interval) during steady-state treatment. At 6 hours post-dosing on Day 22 of treatment, the QTcF interval was prolonged by mean increase from baseline of 10.3 msec (90% CI: 7.3, 13.3). In clinical trials of patients with ALK-positive or ROS1-positive NSCLC (n=1722), electrocardiogram QT prolonged (all grades) was observed in 64 (3.7%) patients. QTcF greater than or equal to 500 msec on at least 2 separate ECGs was observed in 34 of 1619 (2.1%) patients with at least 1 postbaseline ECG assessment and a maximum increase from baseline QTcF greater than 60 msec was observed in 79 (5.0%) of 1585 patients with a baseline and at least 1 postbaseline ECG assessment.

An ECG substudy from Studies A8081005 and A8081007 using blinded manual ECG measurements was conducted in 52 ALK-positive NSCLC patients who received crizotinib 250 mg twice daily. A total of 11 (21.2%) patients and 1 (1.9%) patient had a maximum increase from baseline in QTcF of ≥30 msec to < 60 msec and ≥ 60 msec, respectively, and no patients had a maximum QTcF ≥ 480 msec in this analysis. The central tendency analysis indicated that the largest mean change from baseline in QTcF was 12.3 msec (90% CI: 5.1, 19.5) (least squares [LS] mean from Analysis of Variance [ANOVA]) and occurred at 6 hours post-dose on Cycle 2 Day 1 (steady state). All upper limits of the 90% CI for the LS mean change from baseline in QTcF at all Cycle 2 Day 1 time points were <20 msec. HR decreased with a maximum reduction of 17.8 (range: -51 to +9) beats per minutes after 8 hours on Cycle 2 Day 1 (last ECG collecting time point). Bradycardia was reported in 6 (9.2%) patients.

Pharmacokinetic/pharmacodynamic modeling indicated a concentration-dependent increase in QTcF and decrease in HR (see WARNINGS AND PRECAUTIONS, Cardiovascular & Monitoring and Laboratory Tests; DRUG INTERACTIONS; DOSAGE AND ADMINISTRATION).

Abnormal Hematologic and Clinical Chemistry Findings

Hepatic Laboratory Abnormalities

In clinical studies of XALKORI in patients with either ALK‑positive or ROS1-positive NSCLC, shifts to Grade 3 or 4 ALT, AST, and alkaline phosphatase were observed in 187 (11%), 95 (6%), and 33 (2%) patients, respectively. Patients should be monitored for hepatotoxicity and managed as recommended in WARNINGS AND PRECAUTIONS section.

Drug-induced hepatotoxicity, including hepatic failure, with fatal outcome has occurred in 2 (0.1%) of the 1722 patients treated with XALKORI across clinical trials. Concurrent elevations in ALT and/or AST ≥3 x ULN and total bilirubin ≥2 x ULN without significant elevations of phosphatase (Hy’s Law) have been observed in 8 (<1%) patients treated with XALKORI in clinical trials. Grade 3 or 4 ALT or AST elevations were observed in 187 (11%) and 95 (6%) of patients, respectively. Seventeen (1%) patients required permanent discontinuation from treatment associated with elevated transaminases. Concurrent elevations in ALT >3 x ULN and total bilirubin >2 x ULN without elevated alkaline phosphatase were detected in <1% patients in clinical trials. Liver function tests including ALT, AST, and total bilirubin should be monitored every 2 weeks during the first 2 months of treatment, then once a month and as clinically indicated, with more frequent repeat testing for Grades 2, 3 or 4 elevation. In patients who develop transaminase elevations, see Dose Modification section under DOSAGE AND ADMINISTRATION.

Renal Laboratory Abnormalities

In clinical studies of crizotinib in patients with ALK-positive advanced NSCLC, the estimated glomerular filtration rate (eGFR) decreased from a baseline median of 96.42 mL/min/1.73 m² (n=1681) to a median of 80.23 mL/min/1.73 m² at 2 weeks of treatment (n=1499). Median eGFR appeared to be relatively stable from 12 weeks of treatment (78.06 mL/min/1.73 m², n=1338) through 104 weeks of treatment (75.45 mL/min/1.73 m², n=315) and increased to 83.02 mL/min/1.73 m² at 28 days after the last does of crizotinib (n=123).

Shifts to eGFR Grade 4 (15 to <30 mL/min/1.73 m²) or to eGFR Grade 5 (<15 mL/min/1.73 m²) were observed in 3% and <1% of patients, respectively.

Hematologic Effects

In clinical studies of XALKORI in patients with either ALK-positive or ROS1-positive advanced NSCLC, shifts to Grade 3 or 4 decreases in leukocytes and neutrophils were observed in 64 (4%) and 226 (13%) patients, respectively. Complete blood counts, including differential white blood cell counts, should be monitored as clinically indicated, with more frequent repeat testing if Grade 3 or 4 abnormalities are observed, or if fever or infection occurs. In patients who develop hematologic laboratory abnormalities, see Dose Modification section under DOSAGE AND ADMINISTRATION.

Overview

Crizotinib is a substrate and inhibitor of CYP3A and an inhibitor of CYP2B6. It is also a substrate and an inhibitor of P- glycoprotein (P-gp). The aqueous solubility of crizotinib is pH-dependent. Drug interactions were observed when crizotinib was co-administered with a strong CYP3A inhibitor, a strong CYP3A inducer, and a substrate of CYP3A. Drug interactions may occur when crizotinib is co-administered with other QTc-prolonging and heart rate-lowering drugs. The related findings and precautions are discussed further below.

Drug-Drug Interactions

Drugs That May Increase Crizotinib Plasma Concentrations

CYP3A Inhibitors

Drugs That May Decrease Crizotinib Plasma Concentrations

CYP3A Inducers

Co-administration of crizotinib with CYP3A inducers may decrease crizotinib plasma concentrations. Co-administration of crizotinib (250 mg twice daily) with rifampin (600 mg once daily), a strong CYP3A inducer, resulted in 84% and 79% decreases in crizotinib steady-state AUC_tau and C_max, respectively, compared to when crizotinib was given alone. The concurrent use of strong CYP3A inducers, including but not limited to, carbamazepine, phenobarbital, phenytoin, rifabutin, rifampin, and St. John’s wort, should be avoided (see DOSAGE AND ADMINISTRATION section).

Agents That Increase Gastric pH

The aqueous solubility of crizotinib is pH-dependent, with high (less acidic) pH resulting in lower solubility. The ratio of adjusted geometric means (90% CI) of crizotinib total exposure (AUC_inf) was 89.81% (79.05%, 102.03%), following administration of crizotinib 250 mg relative to crizotinib 250 mg and esomeprazole (40 mg once daily × 5 days). Based on the extent of the change in total exposure, starting dose adjustment is not required when crizotinib is co-administered with agents that increase gastric pH (such as proton pump inhibitors, H₂ blockers, or antacids).

Drugs Whose Plasma Concentrations May Be Altered by Crizotinib

CYP3A Substrates

Crizotinib has been identified as an inhibitor of CYP3A both in vitro and in vivo. Crizotinib may increase plasma concentrations of co-administered CYP3A substrates. Following 28 days of crizotinib dosing at 250 mg taken twice daily in cancer patients, the oral midazolam AUC_inf was 3.65-fold (90% CI: 2.63-5.07) those seen when midazolam was administered alone, suggesting that crizotinib is a moderate inhibitor of CYP3A.

Caution should be exercised in administering crizotinib in combination with drugs that are predominantly metabolized by CYP3A, particularly those CYP3A substrates that have narrow therapeutic indices, including but not limited to alfentanil, cyclosporine, fentanyl, quinidine, sirolimus, and tacrolimus. Co-administration of crizotinib should be avoided with CYP3A substrates that have narrow therapeutic indices and are associated with life-threatening arrhythmias, including but not limited to dihydroergotamine, ergotamine, and pimozide.

CYP2B6 Substrates

Crizotinib is an inhibitor of CYP2B6 in vitro. Therefore, crizotinib may have the potential to increase plasma concentrations of co-administered drugs that are predominantly metabolized by CYP2B6.

Other CYP Substrates

In vitro studies indicated that clinical drug-drug interactions are unlikely to occur as a result of crizotinib-mediated inhibition of the metabolism of drugs that are substrates for CYP1A2, CYP2C8, CYP2C9, CYP2C19 or CYP2D6.

In vitro studies in human hepatocytes indicated that clinical drug-drug interactions are unlikely to occur as a result of crizotinib-mediated induction of the metabolism of drugs that are substrates for CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2C19 or CYP3A (see DETAILED PHARMACOLOGY section).

Co-administration with UGT Substrates

Crizotinib is identified as a competitive inhibitor of UGT enzyme isoforms UGT 1A1 and UGT2B7 in vitro with IC50 values IC50 5.3 µM and 6.9 µM, respectively. Therefore, crizotinib may have the potential to increase plasma concentrations of co-administered drugs that are metabolized predominantly by UGT1A1 (e.g., raltegravir, irinotecan) or UGT2B7 (e.g., morphine, naloxone) (see DETAILED PHARMACOLOGY).

P-gp Substrates

Crizotinib is an inhibitor of P-gp in vitro. Therefore, crizotinib may have the potential to increase plasma concentrations of co-administered drugs that are substrates of P-gp.

OCT Substrates

Crizotinib is an inhibitor of OCT1 (IC50 = 2.4µM) and OCT2 (IC50 = 0.22µM) in vitro. Therefore, crizotinib may have the potential to increase plasma concentrations of co-administered drugs that are substrates of OCT1 or OCT2 (see DETAILED PHARMACOLOGY).

Heart Rate-Lowering Drugs

Bradycardia has been reported in patients treated with XALKORI (see WARNINGS AND PRECAUTIONS, Cardiovascular & Monitoring and Laboratory Tests; ADVERSE REACTIONS, Electrocardiography and Haemodynamics). Avoid using crizotinib in combination with other bradycardic agents (e.g., beta-blockers, non-dihydropyridine calcium channel blockers, cholinesterase inhibitors, and sphingosine-1 phosphate receptor modulators) (including but not limited to atenolol, verapamil, diltiazem, clonidine, digoxin to the extent possible, due to the increased risk of symptomatic bradycardia (syncope, dizziness, hypotension).

The concomitant use of XALKORI with QT interval-prolonging drugs should be avoided to the extent possible (see WARNINGS AND PRECAUTIONS, Cardiovascular & Monitoring and Laboratory Tests; ADVERSE REACTIONS, Electrocardiography and Haemodynamics). Drugs that have been associated with QT interval prolongation and/or Torsade de Pointes include, but are not limited to, the examples in the following list. Chemical/pharmacological classes are listed if some, although not necessarily all, class members have been implicated in QT/QTc interval prolongation and/or Torsade de Pointes:

• Class IA antiarrhythmics (e.g., quinidine, procainamide, disopyramide)

• Class III antiarrhythmics (e.g., amiodarone, sotalol, ibutilide, dronedarone)

• Class 1C antiarrhythmics (e.g., flecainide, propafenone)

• antipsychotics (e.g., chlorpromazine, pimozide, haloperidol, droperidol, ziprasidone)

• antidepressants (e.g., fluoxetine, citalopram, venlafaxine, tricyclic/tetracyclic antidepressants [e.g., amitriptyline, imipramine, maprotiline])

• opioids (e.g., methadone)

• macrolide antibiotics and analogues (e.g., erythromycin, clarithromycin, telithromycin, tacrolimus)

• quinolone antibiotics (e.g., moxifloxacin, levofloxacin, ciprofloxacin)

• pentamidine

• antimalarials (e.g., quinine, chloroquine)

• azole antifungals (e.g., ketoconazole, fluconazole, voriconazole)

• domperidone

• 5-hydroxytryptamine (5-HT)₃ receptor antagonists (e.g., dolasetron, ondansetron)

• tyrosine kinase inhibitors (e.g., sunitinib, nilotinib, lapatinib, vandetanib)

• histone deacetylase inhibitors (e.g., vorinostat)

• beta-2 adrenoceptor agonists (e.g., salmeterol, formoterol)

Drugs that Affect Electrolytes

The use of XALKORI with drugs that can disrupt electrolyte levels should be avoided to the extent possible. Drugs that can disrupt electrolyte levels include, but are not limited to, the following:

• loop, thiazide, and related diuretics
• laxatives and enemas
• amphotericin B
• high-dose corticosteroids

The above list of potentially interacting drugs is not comprehensive. Current information sources should be consulted for newly approved drugs that decrease heart rate, prolong the QT/QTc interval, or decrease electrolytes, as well as for older drugs for which these effects have recently been established.

Drug-Food Interactions

Grapefruit has CYP3A4 inhibitory activity. Therefore, ingestion of grapefruit while on XALKORI (crizotinib) therapy may increase crizotinib plasma concentrations. Concomitant administration of XALKORI with grapefruit, grapefruit juice, products containing grapefruit extract, star fruit, pomegranate, Seville oranges, and other similar fruits that are known to inhibit CYP3A4 should be avoided.

Drug-Herb Interactions

St. John’s wort is a strong CYP3A4 inducer. Co-administration with XALKORI may decrease crizotinib plasma concentrations. Patients receiving XALKORI should not take St. John’s wort concomitantly.

Drug-Lifestyle Interactions

Vision disorder, that was considered related to treatment with XALKORI, most commonly visual impairment, photopsia, vision blurred, and vitreous floaters, was experienced by 1038 (62%) of 1669 patients across clinical trials. Caution should be exercised when driving or operating machinery by patients who experience vision disorder.

Recommended Dose and Dosage Adjustment

The recommended dose schedule of XALKORI (crizotinib) is 250 mg taken orally twice daily with or without food. Treatment should be continued as long as the patient is deriving clinical benefit from therapy. Capsules should be swallowed whole.

For patients with moderate hepatic impairment (any AST and total bilirubin >1.5×ULN and ≤3×ULN), the starting XALKORI dose is recommended to be 200 mg twice daily. For patients with severe hepatic impairment (any AST and total bilirubin >3×ULN), the starting XALKORI dose is recommended to be 250 mg once daily.

The starting dose of XALKORI should be 250 mg once daily in patients with severe renal impairment (CLcr < 30 mL/min) not requiring peritoneal dialysis or hemodialysis.

The concurrent use of strong CYP3A inhibitors such as ketoconazole should be avoided (see DRUG INTERACTIONS and CLINICAL PHARMACOLOGY sections).

The concurrent use of strong CYP3A inducers such as rifampin should be avoided (see DRUG INTERACTIONS and CLINICAL PHARMACOLOGY sections).

Missed Dose

If a dose of XALKORI is missed, then it should be taken as soon as possible. If it is less than 6 hours until the next dose, then the patient should not take the missed dose. Patients should not take 2 doses at the same time to make up for a missed dose.

Dose Modification

Dose reduction and/or treatment interruption may be required based on individual safety and tolerability.

The recommended dose reductions for patients treated with XALKORI 250 mg orally twice daily are:

• First dose reduction: XALKORI 200 mg taken orally twice daily
• Second dose reduction: XALKORI 250 mg taken orally once daily
• Permanently discontinue if unable to tolerate XALKORI 250 mg taken orally once daily
  

Dose modification guidelines for hematologic and non-hematologic toxicities are provided in Tables 6 and 7. For dose modifications in patients treated with a XALKORI dose lower than 250 mg twice daily follow the recommendations in Table 6 and Table 7 accordingly.

QT Interval Prolongation

In the event of a QTc of ≥500 msec (Grade 3), dosing with XALKORI should be withheld until recovery to Grade ≤1 (≤470 msec), then resumed at a reduced dose of 200 mg twice daily. Permanent discontinuation of XALKORI is recommended in the event of a Grade 4 QTc prolongation (≥500 msec [or >60 msec change from baseline] and Torsade de Pointes or polymorphic ventricular tachycardia, or signs/symptoms of serious arrhythmias). Machine-read QTc measurements may not be accurate. Consultation with a cardiologist should be considered when assessing the QTcF to ensure appropriate treatment decisions. Baseline ECG QTcF should be measured prior to initiating treatment with XALKORI and ECGs should be repeated periodically during treatment with XALKORI. Hypokalemia, hypomagnesemia, and hypocalcemia must be corrected prior to XALKORI administration. Serum levels of calcium, potassium, and magnesium should be monitored periodically during treatment, particularly in patients at risk for these electrolyte abnormalities (see WARNINGS AND PRECAUTIONS).

Special Populations

Hepatic Impairment
Crizotinib is extensively metabolized in the liver. Treatment with XALKORI should be used with caution in patients with hepatic impairment. Based on the results from a clinical study in patients with advanced cancer and varying degrees of hepatic impairment (based on National Cancer Institute (NCI) classification), no starting dose adjustment of XALKORI is recommended for patients with mild hepatic impairment (either AST > Upper Limit of Normal (ULN) and total bilirubin ≤ULN or any AST and total bilirubin >ULN but ≤1.5×ULN). For patients with moderate hepatic impairment (any AST and total bilirubin >1.5×ULN and ≤3×ULN), the starting XALKORI dose is recommended to be 200 mg twice daily. For patients with severe hepatic impairment (any AST and total bilirubin >3×ULN), the starting XALKORI dose is recommended to be 250 mg once daily. (See ACTION AND CLINICAL PHARMACOLOGY, Special Populations and Conditions, Hepatic Impairment.)

Renal Impairment
The starting dose of XALKORI should be reduced by 50% (250 mg once daily) in patients with severe renal impairment (CLcr < 30 mL/min) not requiring peritoneal dialysis or hemodialysis. No starting dose adjustment is recommended in patients with mild or moderate renal impairment (see ACTION AND CLINICAL PHARMACOLOGY, Special Populations and Conditions, Renal Impairment).

No data are available for patients with severe renal impairment requiring peritoneal dialysis or hemodialysis (CLcr < 30 mL/min) (see Serious Warnings and Precautions, and ACTION AND CLINICAL PHARMACOLOGY).

The recommended 250 mg BID dosing regimen was the maximum tolerated dose for XALKORI determined in a Phase 1 dose-escalation study in patients with advanced solid tumors.  Treatment of overdose with XALKORI should consist of symptomatic treatment and other supportive measures.  There is no antidote for XALKORI.

Mechanism of Action

Crizotinib is a selective small-molecule inhibitor of the Anaplastic Lymphoma Kinase (ALK) receptor tyrosine kinase (RTK) and its oncogenic variants (i.e., ALK fusion events and selected ALK mutations). Crizotinib is also an inhibitor of the Hepatocyte Growth Factor Receptor (HGFR, c-Met) RTK, ROS (ROS1, c-ros), and Recepteur d’Origine Nantais (RON) RTKs.

Pharmacodynamics

Crizotinib demonstrated concentration-dependent inhibition of the kinase activity of ALK, ROS1, and c‑Met in biochemical assays and inhibited phosphorylation and kinase-dependent phenotypes in cell-based assays. Crizotinib demonstrated potent and selective growth inhibitory activity and induced apoptosis in tumor cell lines exhibiting ALK fusion events (including echinoderm microtubule-associated protein-like 4 [EML4]-ALK and nucleophosmin [NPM]-ALK), ROS1 fusion events, or exhibiting amplification of the ALK or MET gene locus.

Crizotinib demonstrated antitumor efficacy, including marked cytoreductive antitumor activity, in mice bearing tumor xenografts that expressed ALK and ROS1 fusion proteins. The antitumor efficacy of crizotinib was dose-dependent and correlated to pharmacodynamic inhibition of phosphorylation of ALK (EML4-ALK or NPM-ALK) and ROS1 (CD74-ROS1 or EZR-ROS1) fusion proteins in tumors in vivo. Crizotinib also demonstrated marked antitumor activity in mouse xenograft studies, where tumors were generated using a panel of NIH 3T3 cell lines engineered to express key ROS1 fusions identified in human tumors. The antitumor efficacy of crizotinib was dose dependent and demonstrated a correlation with inhibition of ROS1 phosphorylation in vivo.

Pharmacokinetics

Absorption: In patients, following a single oral administration in the fasted state, crizotinib was absorbed with a median time to achieve peak concentrations (T_max) of 4 hours (range: 2 to 9.33 hours) in patients (see Clinical Pharmacokinetics section under DETAILED PHARMACOLOGY). The systemic exposure (C_max, C_trough and AUC_tau) appears to be greater than dose-proportional within the dose range of 200-300 mg twice daily. With twice daily dosing, steady state was achieved within 15 days with a median accumulation ratio of 4.8 (range: 3 to 13), and remained stable. The mean absolute bioavailability of crizotinib was determined to be 43% (range: 32%-66%) following the administration of a single 250 mg oral dose. Following oral administration of a single dose of a 250 mg XALKORI capsule to healthy volunteers in the fasted state, the median T_max was 5 hours, and the geometric mean C_max and AUC of crizotinib were 135 ng/mL and 2887 ng.hr/mL, respectively.
A high-fat meal reduced crizotinib AUC_inf and C_max by approximately 14% when a 250 mg single dose was given to healthy volunteers. XALKORI can be administered with or without food (see DOSAGE AND ADMINISTRATION section).

Distribution: The geometric mean volume of distribution (Vss) of crizotinib was 1772 L following intravenous administration of a 50 mg dose, indicating extensive distribution into tissues from the plasma. In non-clinical studies, tissues with the highest crizotinib and related metabolite concentrations were liver, uveal tract, adrenal gland, small intestine, and pituitary gland.

Binding of crizotinib to human plasma proteins in vitro is 91% and appears to be independent of drug concentration. In vitro studies suggested that crizotinib is a substrate for P-glycoprotein (P‑gp).

Metabolism: In vitro studies demonstrated that CYP3A4/5 were the major enzymes involved in the metabolic clearance of crizotinib. The primary metabolic pathways in humans were oxidation of the piperidine ring to crizotinib lactam and O-dealkylation, with subsequent Phase 2 conjugation of O-dealkylated metabolites.

Crizotinib lactam (M10, PF-06260182) is approximately 2.5- and 7.7-fold less potent than crizotinib in inhibiting ALK and c-Met tyrosine kinases, respectively, in vitro. The O-desalkyl crizotinib (M4, PF-03255243) and O-desalkyl crizotinib lactam (M2, PF-06268935) are inactive against ALK and c-Met.

In vitro studies in human microsomes demonstrated that crizotinib is a time-dependent inhibitor of CYP3A and CYP2B6.

Elimination: Following a single 250 mg oral dose, the terminal half-life (t_1/2) of crizotinib was 42 hours (% coefficient of variation [CV]: 21) in patients; the mean apparent clearance (CL/F) was 100 L/hr (%CV: 50). At steady state after 250 mg twice daily (Cycle 1 Day 15), the CL/F appeared to be lower (65 L/hr with % CV of 56). The reduced clearance at steady state may be due to autoinhibition of CYP3A by crizotinib following repeated dosing.

In a non-clinical study, delayed clearance of crizotinib was observed; tissues with the longest t1/2 values (range: 576 to 118 hours) were eye, epididymis, testis, pigmented skin, kidney cortex, and brown fat.

Following the administration of a single 250 mg radiolabeled crizotinib dose to healthy subjects, 63% and 22% of the administered dose was recovered in feces and urine, respectively. Unchanged crizotinib represented approximately 53% and 2.3% of the administered dose in feces and urine, respectively.

Special Populations and Conditions

Hepatic Impairment: Crizotinib is extensively metabolized in the liver. Patients with mild (either AST >ULN and total bilirubin ≤ULN or any AST and total bilirubin >ULN but ≤1.5×ULN), moderate (any AST and total bilirubin >1.5×ULN and ≤3×ULN), or severe (any AST and total bilirubin >3×ULN) hepatic impairment or normal (AST and total bilirubin ≤ULN) hepatic function (who were matched controls for mild or moderate hepatic impairment) were enrolled in an open-label, non-randomized clinical study (Study 1012), based on NCI classification.

Following XALKORI 250 mg twice daily dosing, patients with mild hepatic impairment (N=10) showed similar systemic crizotinib exposure at steady state compared to patients with normal hepatic function (N=8), with geometric mean ratios for area under the plasma concentration-time curve as daily exposure at steady state (AUC_daily) and C_max of 91.1% and 91.2%, respectively. No starting dose adjustment is recommended for patients with mild hepatic impairment.

Following XALKORI 200 mg twice daily dosing, patients with moderate hepatic impairment (N=8) showed higher systemic crizotinib exposure compared to patients with normal hepatic function (N=9) at the same dose level, with geometric mean ratios for AUC_daily and C_max of 150% and 144%, respectively. However, the systemic crizotinib exposure in patients with moderate hepatic impairment at the dose of 200 mg twice daily was comparable to that observed from patients with normal hepatic function at a dose of 250 mg twice daily, with geometric mean ratios for AUC_daily and C_max of 114% and 109%, respectively.

The systemic crizotinib exposure parameters AUC_daily and C_max in patients with severe hepatic impairment (N=6) receiving a XALKORI dose of 250 mg once daily were approximately 64.7% and 72.6%, respectively, of those from patients with normal hepatic function receiving a dose of 250 mg twice daily.

An adjustment of the dose of XALKORI is recommended when administering XALKORI to patients with moderate or severe hepatic impairment (see WARNINGS AND PRECAUTIONS and DOSAGE AND ADMINISTRATION).

Renal Impairment: The exposure to crizotinib was evaluated in patients with mild (CLcr 60-89 mL/min, N=226) and moderate (CLcr 30-59 mL/min, N=73) renal impairment enrolled in Studies A8081001 and A8081005. An evaluation on the baseline renal function status measured by CLcr on observed crizotinib steady state trough concentrations (C_trough,ss) demonstrated that in Study A8081001, the adjusted geometric mean of plasma C_trough,ss in mild (C_trough,ss= 319 ng/mL, N=35) and moderate (C_trough,ss = 338 ng/mL, N=8) renal impairment patients were 105.10% (90% CI: 92.90%, 118.91%) and 111.41% (90% CI: 90.17%, 137.66%), respectively, of those in patients with normal renal function (C_trough,ss = 304 ng/mL, N=44). In Study A8081005, the adjusted geometric mean C_trough,ss of crizotinib in mild (C_trough,ss = 311 ng/mL, N=191) and moderate (C_trough,ss = 328 ng/mL, N=65) renal impairment groups were 109.14% (90% CI: 102.08%, 116.68%) and 115.07% (90% CI: 104.08%, 127.23%), respectively, of those in patients with normal renal function (C_trough,ss = 285 ng/mL, N=331). The population pharmacokinetic analysis from Studies A8081001, A8081005 and A8081007 indicated that baseline CLcr did not have a clinically relevant effect on crizotinib pharmacokinetics.

An open-label, single dose parallel-group study (A8081020) evaluated the effect of severe renal impairment on exposure to crizotinib. Eight subjects with normal renal function (CLcr ≥90 mL/min) were matched 1-to-1 to 8 subjects with severe renal impairment not requiring dialysis (CLcr <30 mL/min) with respect to age (mean 61 vs. 63 years), weight (mean 84 vs. 86 kg) race (6 white and 2 black vs. 5 white and 3 black subjects), and sex (2 males and 6 females in each group). All subjects received a single oral crizotinib dose of 250 mg. The results of Study A8081020 are summarized in Table 8.

In subjects with severe renal impairment, crizotinib AUC and C_max increased by 79% and 34%, respectively, compared to those with normal renal function. Based on these results, a starting dose reduction by 50% (250 mg once daily) is recommended when administering crizotinib to patients with severe renal impairment not requiring peritoneal dialysis or hemodialysis (see WARNINGS AND PRECAUTIONS and DOSAGE AND ADMINISTRATION, Recommended Dose and Dosage Adjustment, Special Populations).

No dedicated renal impairment study has been conducted in patients with mild (CLcr 60-89mL/min) or moderate (CLcr 30-59mL/min) renal impairment. Based on the population pharmacokinetic analysis described above, no starting dose adjustment is recommended in patients with mild or moderate renal impairment (see WARNINGS AND PRECAUTIONS, and DOSAGE AND ADMINISTRATION). No data are available for patients with end-stage renal disease.

Age: Based on the population pharmacokinetic analysis of pooled PK dataset from Studies A8081001, A8081005 and A8081007 containing 1214 patients with a mean (range) age of 51.8 years (19-83 years), age has no effect on crizotinib pharmacokinetics. Therefore, no starting dose adjustments of crizotinib are recommended based on age.

Pediatrics (range: 2-22 years): Limited data are available on the use of XALKORI in pediatric patients. XALKORI has been studied in a phase 1/2 trial, with 64 children who had solid tumors or anaplastic large cell lymphoma and had pharmacokinetic sampling after the first dose (n=15) of XALKORI or at steady state (n=49). Dose levels evaluated ranged from 100 to 365 mg/m²/dose administered twice daily. The effectiveness of XALKORI in this pediatric population has not been established.

Ethnicity: After 250 mg twice daily dosing, steady-state crizotinib C_max and AUC_t in Asian patients were 1.57- (90% CI: 1.16-2.13) and 1.50- (90% CI: 1.10-2.04) fold those seen in non-Asian patients, respectively. There was a higher incidence of Grade 3 or 4 adverse events in non-Asians (17%) than Asians (10%). (see Clinical Pharmacokinetics section under DETAILED PHARMACOLOGY).

XALKORI (crizotinib) should be stored at 25 °C with excursions to 15-30 °C.

No special requirements.

Dosage Forms

XALKORI (crizotinib) 250 mg capsules: Hard gelatin capsule, size 0, pink opaque/pink opaque, with “Pfizer” on the cap and “CRZ 250” on the body.

XALKORI (crizotinib) 200 mg capsules: Hard gelatin capsule, size 1, white opaque/pink opaque, with “Pfizer” on the cap and “CRZ 200” on the body.

Composition

XALKORI capsules are available in two dosage strengths, 250 mg and 200 mg, containing 250 mg and 200 mg of crizotinib, respectively.

Non-Medicinal Ingredients: Colloidal silicon dioxide, microcrystalline cellulose, anhydrous dibasic calcium phosphate, sodium starch glycolate, magnesium stearate, and hard gelatin capsule shells. The pink opaque capsule shell components contain gelatin, titanium dioxide, and red iron oxide. The white opaque capsule shell components contain gelatin and titanium dioxide. The printing ink contains shellac, propylene glycol, strong ammonia solution, potassium hydroxide and black iron oxide.

Packaging

XALKORI is supplied as bottles of 60 and PVC/aluminum foil blisters containing 60 capsules [6 cards of 10 (5 X 2) capsules].

Control #: 243841
February 3 2021