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A member asked:
Could bactrim (sulfamethoxazole and trimethoprim) affect birth control when taken on off week?
A doctor has provided 1 answer
Yes: Bactria, penicillins,tetracyclines,nitrofurantoin, rifampin and metronidazole may decrease the effectiveness of birth control pills. So best use other methods of contraception like condoms when taking antibiotics.
Answered 7/8/2017
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Related Questions
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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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Is it actually true that bactrim (sulfamethoxazole and trimethoprim) antibiotic will interfere with provera birth control pill?
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Have been diagnosed with suspected parasitic infection. When I take 100mg bactrim (sulfamethoxazole and trimethoprim) a day it's under control, flares up otherwise. Request advice on med?
2 doctors weighed in across 2 answers
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