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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Had Protected Sex, Condom Broke. Took Plan B. Took Clarithromycin. What Percentage Will Clarithromycin Decrease The Effectiveness Of Plan B?

On tuesday morning I has protected sex but I m worried that the condom broke so I took plan b Thursday morning at 9:30am. Both pills. I also became aware that I have strep I was prescribed Clarithromycin . I took my first pill of clarithromycin at 4:45pm... I am wondering if It cancels out the plan b or by what percentage does it decrease the effectiveness?
Thu, 30 Aug 2012
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General & Family Physician 's  Response
Hi,
You took emergency contraception due to condom failure.
Emergency contraception Plan B consist of levenorgesteral.
Clarithromycin is usually know to cause drug interactions with most of the drugs.
Regarding interaction with Plan B there is no solid evidence of decreased in effectiveness.
But definetely it wont cancel the effect of your Plan B.
Get a consultation with your Gync or cautiously wait.
You should always inform your doctor about your medications in future.
Bye
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Had Protected Sex, Condom Broke. Took Plan B. Took Clarithromycin. What Percentage Will Clarithromycin Decrease The Effectiveness Of Plan B?

Hi, You took emergency contraception due to condom failure. Emergency contraception Plan B consist of levenorgesteral. Clarithromycin is usually know to cause drug interactions with most of the drugs. Regarding interaction with Plan B there is no solid evidence of decreased in effectiveness. But definetely it wont cancel the effect of your Plan B. Get a consultation with your Gync or cautiously wait. You should always inform your doctor about your medications in future. Bye