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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Can Antibiotics ( For Sinus Infection) Affect The Effectiveness Of A Birth Control Pill?

Hi, I've been on Lo Loestrin FE for about 1.5 years or so. I have been taking my pills regularly, my husband and I had sex on Saturday, January 8th. I know I ovulate on or around the 9th, and then two days later (the 11th) I started antibiotics (amoxicillan or augmentin, not sure which) for a sinus infection. I know I will know in about a week or so anyways, but I was just wondering if taking antibiotics 3 days after sex, 2 days post ovulation could affect the effectiveness of the birth control? Possible to get pregnant that way or no?

Thanks!
posted on Fri, 21 Feb 2014
Twitter Fri, 21 Feb 2014 Answered on
Twitter Sat, 22 Feb 2014 Last reviewed on
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OBGYN,  's  Response
Hi, I understand your concerns . Antibiotics do reduce effectiveness of birth control pills. It will be helpful if you can tell me name of the exact antibiotic. You can get pregnant.
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Can Antibiotics ( For Sinus Infection) Affect The Effectiveness Of A Birth Control Pill?

Hi, I understand your concerns . Antibiotics do reduce effectiveness of birth control pills. It will be helpful if you can tell me name of the exact antibiotic. You can get pregnant.