A member asked:

I'm on the pill and had sex without a condom yesterday. if i start antibiotics today for a uti, will it affect my protection from last night?

A doctor has provided 1 answer
Dr. Charles Gordon answered

Specializes in Adolescent Medicine

No: You say are on BCP. They work by fooling your body into thinking it is pregnant and so not releasing a new egg to be fertilized. An antibiotic does not interfere with that. There are plenty of drug-interaction websites available on the net that you can check if you are ever worried about a particular drug interaction.

Answered 11/6/2015

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