Ampicillin and Norgestimate and ethinyl estradiol interaction
Ampicillin and Norgestimate and ethinyl estradiol: the Ampicillin prescribing label describes an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Moderate
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Ampicillin label · effective 2026-07-27
Moderate
Oral Contraceptives : May be less effective and increased breakthrough bleeding may occur.
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.