Background: I recently had an ear infection (June 27) and was prescribed a 10 day round of amoxicillin trihydrate (500mg) and ear drops (ciprophloxacin/dexamethasone). I was on my period/placebo pills from June 30-July 6. I took the amoxicillin the best I could every eight hours three times a day but ended up having to go two days over and took one amoxicillin pill on July 7 and one amoxicillin pill on July 8. July 7 is when I started my new pack of birth control pills. I'm religious about taking my birth control pill to an alarm and never miss one. I've heard stories both ways about amoxicillin affecting birth control pills. Some people say you should be abstaining from sex/using condoms for the entire month. Others say there's no interaction. I had sex July 10 11 14 15 and 17. Each of these episodes we used a condom for the actual act but I'm afraid of any of the foreplay may have caused accidental sperm insertion (i.e. things like him touching himself to get ready and fingering me or massaging me and his penis touching my butt). I was so paranoid because his penis got relatively close to the outside of my vulva one time that I took plan b on July 11 just to put my mind at ease. I continued taking my birth control pills normally afterwards. I usually don't worry about this kind of stuff at all because I take the pill so well and always use condoms. The amoxicillin has me all worried! Do I need to be concerned about anything at all? Thanks so much for any advice you can give.
2014-11-19 10:18:47
Hi! According to the best scientific data that we have antibiotics don't change the effectiveness of the pill. So you really don't have anything to worry about in the first place. Certainly you took many precautions too so as far as pregnancy is concerned the risk is extremely low. The Plan B may effect your period--it might delay it by a week or so. Irregular bleeding is very common after taking it. Just to warn you that it might happen and is no cause for alarm. Good luck!
2014-11-19 10:19:12
