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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Suggest Methods To Prevent Pregnancy

i'm on the contraceptive pill Yaz. i take it every night around 8pm. i had sex two nights ago without a condom and today a doctor perscribed me penacilan cause it turns out i have scarlet fever. he asked if i was sexually active and i lied because my mum was there. i just want to be sure there's no way i can be pregnant
Wed, 29 Jun 2016
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OBGYN 's  Response
Hello, and I hope I can help you today.

If you were taking the pill daily and didn't miss any, there would be no reason why you should have been fertile (or have ovulated) at the time you had sex, regardless if you took antibiotics or not.

Furthermore, only certain kinds of antibiotics (and these types are very strong and are most commonly used to treat TB) will interact with the functioning of birth control pills. Patients are warned to use backup birth control when taking any antibiotics, but the risk is really only theoretical with short courses of weaker antibiotics like Penicillin. And you took the medication after you already had sex a few days before.

So in summary, you do not have to worry about pregnancy in your situation.

I hope I was able to adequately answer your question today and that my advice was helpful.

Best wishes,

Dr. Brown
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Suggest Methods To Prevent Pregnancy

Hello, and I hope I can help you today. If you were taking the pill daily and didn t miss any, there would be no reason why you should have been fertile (or have ovulated) at the time you had sex, regardless if you took antibiotics or not. Furthermore, only certain kinds of antibiotics (and these types are very strong and are most commonly used to treat TB) will interact with the functioning of birth control pills. Patients are warned to use backup birth control when taking any antibiotics, but the risk is really only theoretical with short courses of weaker antibiotics like Penicillin. And you took the medication after you already had sex a few days before. So in summary, you do not have to worry about pregnancy in your situation. I hope I was able to adequately answer your question today and that my advice was helpful. Best wishes, Dr. Brown