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A member asked:

What is it about antibiotics that causes birth control pills to be ineffective?

A doctor has provided 1 answer
Dr. Peter Karsant answered

Specializes in Dentistry

Bacteria: The bacteria in your gut that make the pill effective by converting it from inactive to active form are killed off by antibiotics.

Answered 5/21/2013

5.1k views

Thank

Related Questions

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Can birth control pills cause a lot vaginal discharge? Thought i peed myself but i didn't bcuz i felt very wet (also treating a UTI w/ antibiotics)

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Can stress cause vaginal spotting during a pack of birth control? Im on day 14 of my Tri Sprintec Lo. I have been on the pill for two years. I have no new health issues except being on two rounds of antibiotics recently and been very stressed?

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A member asked:

Im on combination Tri Sprintec Lo birth control and on Amoxicillin 875 mg right now. My period is over but Im spotting while on active pills. Can the antibiotic cause this? It has a label on the bottle about effectiveness

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