A member asked:

Could antibiotics delay your period if you are on the birth control pill?

A doctor has provided 1 answer
Dr. James Rochester answered

Specializes in Family Medicine

Yes: Yes, but more importantly, they can INTERFERE with the EFFECTIVENESS of the contraceptive effect of your pill. Whenever I prescrive antibiotics for my female patients on the pilll, I counsel them to use a barrier method (condom) for contraceptiive purposes. For how long depends on how long you are on the antibiotic and where you are in your pill pack. Delived quite a few babies from this.

Answered 5/23/2014

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