Capmatinib exposure (AUC0-12h and Cmax) increased approximately proportionally over a dose range of 200 mg (0.5 times the recommended dosage) to 400 mg. Capmatinib reached steady-state by day 3 following twice daily dosing, with a mean (% coefficient of variation [%CV]) accumulation ratio of 1.5 (41%).
Absorption
After administration of TABRECTA 400 mg orally in patients with cancer, capmatinib peak plasma concentrations (Cmax) were reached in approximately 1 to 2 hours (Tmax). The absorption of capmatinib after oral administration is estimated to be greater than 70%.
Effect of Food
A high-fat meal (containing approximately 1000 calories and 50% fat) in healthy subjects increased capmatinib AUC0-INF by 46% with no change in Cmax compared to under fasted conditions. A low-fat meal (containing approximately 300 calories and 20% fat) in healthy subjects had no clinically meaningful effect on capmatinib exposure. When capmatinib was administered at 400 mg orally twice daily in cancer patients, exposure (AUC0-12h) was similar after administration of capmatinib with food and under fasted conditions.
Distribution
Capmatinib plasma protein binding is 96%, independent of capmatinib concentration. The apparent mean volume of distribution at steady-state is 164 L.
The blood-to-plasma ratio was 1.5, but decreased at higher concentrations to 0.9.
Elimination
The effective elimination half-life of capmatinib is 6.5 hours. The mean (%CV) steady-state apparent clearance of capmatinib is 24 L/hr (82%).
Metabolism
Capmatinib is primarily metabolized by CYP3A4 and aldehyde oxidase.
Excretion
Following a single oral administration of radiolabeled-capmatinib to healthy subjects, 78% of the total radioactivity was recovered in feces with 42% as unchanged and 22% was recovered in urine with negligible as unchanged.
Specific Populations
No clinically significant effects on the pharmacokinetic parameters of capmatinib were identified for the following covariates assessed: age (26 to 90 years), sex, race (White, Asian, Native American, Black, unknown), body weight (35 to 131 kg), mild to moderate renal impairment (baseline CLcr 30 to 89 mL/min by Cockcroft-Gault) and mild, moderate or severe hepatic impairment (Child-Pugh classification). The effect of severe renal impairment (baseline CLcr 15 to 29 mL/min) on capmatinib pharmacokinetics has not been studied.
Drug Interaction Studies
Clinical Studies and Model-Informed Approaches
Strong CYP3A Inhibitors: Coadministration with itraconazole (a strong CYP3A inhibitor) increased capmatinib AUC0-INF by 42% with no change in capmatinib Cmax.
Strong CYP3A Inducers: Coadministration with rifampicin (a strong CYP3A inducer) decreased capmatinib AUC0-INF by 67% and decreased Cmax by 56%.
Moderate CYP3A Inducers: Coadministration with efavirenz (a moderate CYP3A inducer) was predicted to decrease capmatinib AUC0-12h by 44% and decrease Cmax by 34%.
Proton Pump Inhibitors: Coadministration with rabeprazole (a proton pump inhibitor) decreased capmatinib AUC0-INF by 25% and decreased Cmax by 38%.
Substrates of CYP Enzymes: Coadministration of capmatinib increased caffeine (a CYP1A2 substrate) AUC0-INF by 134% with no change in its Cmax. Coadministration of capmatinib had no clinically meaningful effect on exposure of midazolam (a CYP3A substrate).
P-gp Substrates: Coadministration of capmatinib increased digoxin (a P-gp substrate) AUC0-INF by 47% and increased Cmax by 74%.
BCRP Substrates: Coadministration of capmatinib increased rosuvastatin (a BCRP substrate) AUC0-INF by 108% and increased Cmax by 204%.
In Vitro Studies
Transporter Systems: Capmatinib is a substrate of P-gp, but not a substrate of BCRP or MRP2. Capmatinib reversibly inhibits MATE1 and MATE2K, but does not inhibit OATP1B1, OATP1B3, OCT1, OAT1, OAT3, or MRP2.