Does amoxicillin interfere with birth control?
On One Hand: Proof Against Systematic InterferenceIn a study published in the Journal of the American Academy of Dermatology, a literature review of clinical studies indicates that, with the exception of Rifampin, many common antibiotics do not alter the blood levels of oral contraceptives (OC). Among the specific antibiotics studied was ampicillin, a penicillin-derivative which works similarly to amoxicillin. University of Liverpool data also indicate a lack of drug interaction between amoxicillin and the contraceptive vaginal ring Nuvaring. Amoxicillin does not, therefore, appear to always interfere with OC.On the Other: Proof Supporting the Risk of InterferenceA review published in the Journal of Obstetrics & Gynecology indicates that some patients taking tetracyclines and penicillin derivatives (such as amoxicillin) can experience large decreases in plasma concentrations of contraceptive components and ovulate. This means that amoxicillin has the potential to interfere with birth c