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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Is There Any Pregnancy Risk With Unprotected Sex While In Micronor

Ok well im on the antibiotic keflex 500mg. I had unprotected sex today while i was taking the antibiotic...could i get pregnant?? Because im on birth control called micronor and i dont get my period because of it. So if i could het pregnant i wouldnt even no when to take a pregancy test
Fri, 6 Jan 2017
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General & Family Physician,  's  Response
Hi,

There is no evidence that cephalexin will affect birth control pills. It is a common belief that all antibiotics interfere with the efficacy of birth control pills, though that is not always the case.

Micronor is very effective in preventing pregnancy. It has just 0.5% failure rate if you have taken it regularly on specific time. So I think there is no chance of pregnancy. If you want to confirm, you can go blood HCG test 10 days after sexual intercourse or urine pregnancy test 3 week after your unprotected intercourse or 7 days after completing the micronor pack. Avoid stress, take healthy diet, drink plenty of water and do regular exercise.

Hope this may help you. Contact further if follow up needed.

Best regards,
Dr. Sagar
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Is There Any Pregnancy Risk With Unprotected Sex While In Micronor

Hi, There is no evidence that cephalexin will affect birth control pills. It is a common belief that all antibiotics interfere with the efficacy of birth control pills, though that is not always the case. Micronor is very effective in preventing pregnancy. It has just 0.5% failure rate if you have taken it regularly on specific time. So I think there is no chance of pregnancy. If you want to confirm, you can go blood HCG test 10 days after sexual intercourse or urine pregnancy test 3 week after your unprotected intercourse or 7 days after completing the micronor pack. Avoid stress, take healthy diet, drink plenty of water and do regular exercise. Hope this may help you. Contact further if follow up needed. Best regards, Dr. Sagar