misslindseylou wrote:Hello folks,
I am on birth control pills and took penicillin during this cycle. I haven't been able to find great sources regarding how much penicillin decreases the effectiveness of birth control. Does anyone know of someone who got pregnant this way?
Good morning, by misslindseylou.

I remember every time I was on an antibiotic my doctor would tell me to use an additional form of birth control; that it could interfere with the pill I was taking at the time.
I would ask my doctor to be sure.
Best wishes,
Pia