Etonogestrel and ethinyl estradiol and Norgestimate and ethinyl estradiol interaction
Etonogestrel and ethinyl estradiol and Norgestimate and ethinyl estradiol: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Etonogestrel and ethinyl estradiol (Etonogestrel/Ethinyl Estradiol) label · effective 2025-02-26
WARNING: CIGARETTE SMOKING AND SERIOUS CARDIOVASCULAR EVENTS Cigarette smoking increases the risk of serious cardiovascular events from combination hormonal contraceptive (CHC) use.
Cigarette smoking increases the risk of serious cardiovascular events from combination hormonal contraceptive (CHC) use.
Effects of CHCs on Other Drugs CHCs containing ethinyl estradiol may inhibit the metabolism of other compounds (e.g., cyclosporine, prednisolone, theophylline, tizanidine, and voriconazole) and increase their plasma concentrations.
Consider an alternate contraceptive method for women with uncontrolled dyslipidemia.
In these studies, which were required or sponsored by regulatory agencies, Etonogestrel/Ethinyl Estradiol Vaginal Ring users had a risk of VTE similar to Combined Oral Contraceptives (COCs) users (see Table 1 for adjusted hazard ratios).
From the Norgestimate and ethinyl estradiol (MONO-LINYAH) label · effective 2026-06-23
Effects of Other Drugs on Combined Oral Contraceptives Substances decreasing the plasma concentrations of COCs Drugs or herbal products that induce certain enzymes, including cytochrome P450 3A4 (CYP3A4), may decrease the plasma concentrations of COCs and potentially diminish the effectiveness of COCs or increase breakthrough bleeding.
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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.