التداخل بين إيتونوجيستريل وإيثينيل إستراديول وفوسامبرينافير

Concomitant administration of strong or moderate CYP3A4 inhibitors such as itraconazole, voriconazole, fluconazole, grapefruit juice, or ketoconazole may increase plasma estrogen and/or progestin concentrations.

…non-nucleoside reverse transcriptase inhibitors Significant changes in the plasma concentrations of the estrogen and /or progestin have been noted in some cases of co-administration with HIV protease inhibitors (decrease [e.g., nelfinavir, ritonavir, darunavir/ritonavir, (fos)amprenavir/ritonavir, lopinavir/ritonavir, and tipranavir/ritonavir] or increase [e.g., indinavir…

Fosamprenavir calcium: ↓ Amprenavir ↓ Ethinyl estradiol May lead to loss of virologic response. a Fosamprenavir calcium/ritonavir: ↓ Ethinyl estradiol Increased risk of transaminase elevations.

Oral contraceptives: Ethinyl estradiol/norethindrone a Alternative methods of non-hormonal contraception are recommended.