Fosaprepitant ve Levonorgestrel ve etinilestradiol etkileşimi

CYP3A inhibitors such as itraconazole, voriconazole, fluconazole, grapefruit juice The effect of grapefruit juice on CYP3A4 enzymes (e.g., strong vs. moderate inhibition) depends on its brand, concentration, and preparation. , or ketoconazole may increase systemic exposure of the estrogen and/or progestin component of CHCs.

Hormonal Contraceptives: Efficacy of contraceptives may be reduced during treatment and for 1 month following administration of the last dose of either fosaprepitant or oral aprepitant.

Risk of Reduced Efficacy of Hormonal Contraceptives Upon coadministration with fosaprepitant, the efficacy of hormonal contraceptives may be reduced during administration of and for 28 days following the last dose of fosaprepitant [see Clinical Pharmacology ( 12.3 )] .

Hormonal Contraceptives Clinical Impact Decreased hormonal exposure during administration of and for 28 days after administration of the last dose of fosaprepitant [see Warnings and Precautions ( 5.5 ), Use in Specific Populations ( 8.3 ), and Clinical Pharmacology ( 12.3 )] .

Examples birth control pills, transdermal systems, implants, and certain intrauterine systems CYP2C9 Substrates Warfarin Clinical Impact Decreased warfarin exposure and decreased prothrombin time (INR) [see Warnings and Precautions ( 5.4 ) and Clinical Pharmacology ( 12.3 )] .