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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
Dr. Jose Prieto-hernandez answered

Specializes in Infectious Disease

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

A member asked:

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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A member asked:

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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A member asked:

Is it actually true that bactrim (sulfamethoxazole and trimethoprim) antibiotic will interfere with provera birth control pill?

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A member asked:

What is the probability to have a birth defect for taking bactrim (sulfamethoxazole and trimethoprim) forte during the 1st 10 days of pregnancy having no idea that there is a baby there!

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A member asked:

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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