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A member asked:

Does bactrim (sulfamethoxazole and trimethoprim) make the birth control tri linyah ineffective?

A doctor has provided 1 answer

No: Bactrim (sulfamethoxazole and trimethoprim) is an antibiotic, and the current thinking is that it does not decrease the effectiveness of birth control pills. The birth control pills should work with the same high level of effectiveness, with or without Bactrim (sulfamethoxazole and trimethoprim).

Dr Chiu and 2 doctors agreed

Answered 6/13/2016

1.2k views

Thank

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Does bactrim (sulfamethoxazole and trimethoprim) increase chances of getting pregnant if not on birth control?

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Should I take a Plan B pill if I had unprotected sex 3 days after stopping Bactrim (sulfamethoxazole and trimethoprim). I've been on the birth control Viorele for 4 months.

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I took bactrim (sulfamethoxazole and trimethoprim) once literally one pill while on birth control and had unprotected sex that day what are the chances of me getting pregnant?

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