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A 41-year-old member asked:

What to do if i had sex 3 days ago while on the pill and now i need to take antibiotics?

1 doctor answer1 doctor weighed in
Dr. Charles Whiting
Obstetrics and Gynecology 27 years experience
Overhyped...: Contrary to popular belief, most common antibiotics don't seriously affect birth control pills. Rifampin, used to treat Tuberculosis is an exception. Penicillin, amoxicillin, ampicillin, sulfamethoxazole/trimethoprim (Bactrim), tetracycline, metronidazole have a small effect but pregnancy from this is very rare. Take the antibiotic and use a condom if you have intercourse. Best wishes!

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Last updated Jan 11, 2015

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