Drug Interaction Report

MONITOR: Coadministration with inhibitors of P-glycoprotein (P-gp), uridine diphosphate glucuronosyltransferase (UGT) 1A1 or 2B7, and/or breast cancer resistance protein (BCRP) may increase the plasma levels and risk of adverse effects of binimetinib. The proposed mechanism involves the reduced metabolic clearance of binimetinib through inhibition of P-gp, UGT 1A1, UGT 2B7, and/or BCRP. The clinical significance of this interaction is unknown as no clinically relevant drug interactions have been demonstrated with binimetinib.

MANAGEMENT: Until further information is available, caution is recommended if binimetinib must be used concomitantly with P-gp, UGT 1A1, UGT 2B7, and/or BCRP inhibitors. Binimetinib should be monitored more closely whenever a P-gp, UGT 1A1, UGT 2B7, and/or BCRP inhibitor is added to or withdrawn from therapy, and the binimetinib dosage adjusted as necessary.

ADJUST DOSING INTERVAL: Food significantly enhances the oral bioavailability of telaprevir. When given with a meal containing 533 kcal and 21 g fat, telaprevir systemic exposure (AUC) increased by 237% compared to administration under fasting conditions. The type of meal also affects the exposure to telaprevir. Relative to fasting, telaprevir AUC increased by approximately 117% with a low-fat meal (249 kcal; 3.6 g fat) and 330% with a high-fat meal (928 kcal; 56 g fat). In Phase 3 clinical trials, telaprevir doses were administered within 30 minutes of completing a meal or snack containing approximately 20 grams of fat.

MANAGEMENT: Telaprevir should be administered with food containing approximately 20 grams of fat. Patients should be advised that the fat content of the meal or snack is critical to the absorption of telaprevir. Food taken with telaprevir should be ingested within 30 minutes prior to each dose. Examples of some foods that could be taken with telaprevir include: bagel with cream cheese; half cup of nuts; 3 tablespoons of peanut butter; 1 cup of ice cream; 2 ounces of American or cheddar cheese; 2 ounces of potato chips; or half cup of trail mix.