Darunavir and cobicistat and Estradiol interaction
Darunavir and cobicistat and Estradiol: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Darunavir and cobicistat (PREZCOBIX) label · effective 2026-02-01
Hormonal contraceptives: Additional or alternative (non-hormonal) forms of contraception should be considered when estrogen-containing contraceptives are co-administered with PREZCOBIX or PREZCOBIX PED [see Use in Specific Populations (8.3) ] . drospirenone/ethinylestradiol ↑ drospirenone ↓ ethinylestradiol For co-administration with drospirenone, clinical monitoring…
Other progestin/estrogen contraceptives progestin: effects unknown estrogen: effects unknown No data are available to make recommendations on co-administration with other hormonal contraceptives.
From the Estradiol (Delestrogen) label · effective 2026-05-13
Inhibitors of CYP3A4 such as erythromycin, clarithromycin, ketoconazole, itraconazole, ritonavir and grapefruit juice may increase plasma concentrations of estrogens and may result in side effects.
Therefore, inducers or inhibitors of CYP3A4 may affect estrogen drug metabolism.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.