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Dr. Andrew Rynne

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Does Trimethoprim reduce the effectiveness of Cerazette birth control pill?

Hi, I am on the mini-pill Cerazette. I have been prescribed trimethoprim (200 mg/ 2x a day) for a UTI. I was wondering if I would need to use condoms while on this medication, and if so, how long after I stop using it should I continue using a back form of birth control.

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Thu, 31 Jan 2019
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General & Family Physician 's  Response
Hello,

Trimethoprim will not affect the effectiveness of birth control pills. You do not have to take additional contraceptive measures.

Hope I have answered your query. Let me know if I can assist you further.

Regards,
Dr. Lekshmi Rita Venugopal
General & Family Physician
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