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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Do Antibiotics Decrease Yaz S Effectiveness?

My boyfriend and I recently had sex and the condom broke, five days after I stopped taking amoxicillin antibiotics for an ear infection. I am on yaz birth control and take it at the same time every day but I hear that antibiotics decrease yaz s effectiveness. What s re the chances that I could be pregnant?
Tue, 22 Nov 2016
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General & Family Physician,  's  Response
Hello dear
I understand your concern
Yes amoxicillin cause decrease in the effective ness of the yaz pill.
It decrease the hormone level in the circulation and increased the metabolism in the liver cause decrease in the effectiveness.
But as condom broke, there may be chance of the pregnancy.
So I would suggest to wait for the period to come.
If your period will delay by the 8-10 days then go for urine pregnancy test and or blood HCG to confirm the pregnancy.
If you will be pregnant and do not want the child then still it can be terminated by abortion pill under the supervision of gynecologist.
Hope this may help you

Contact HCM for further health query
Best regards
Dr. SAGAR
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Do Antibiotics Decrease Yaz S Effectiveness?

Hello dear I understand your concern Yes amoxicillin cause decrease in the effective ness of the yaz pill. It decrease the hormone level in the circulation and increased the metabolism in the liver cause decrease in the effectiveness. But as condom broke, there may be chance of the pregnancy. So I would suggest to wait for the period to come. If your period will delay by the 8-10 days then go for urine pregnancy test and or blood HCG to confirm the pregnancy. If you will be pregnant and do not want the child then still it can be terminated by abortion pill under the supervision of gynecologist. Hope this may help you Contact HCM for further health query Best regards Dr. SAGAR