A member asked:

I took 1st pill of yaz (drospirenone and ethinyl estradiol) last monday.i took antibotics from the same monday till friday. friday i had sex. am i still protected bcz i took abtibiotics?

4 doctors weighed in across 2 answers

No: Antibiotics can interfere with birth control pills and make them less effective. Nothing you can do now and you will probably be okay. If you miss your period take a home ept. In the future use condoms in a cycle where you have taken antibiotics.

Answered 6/13/2016

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Dr. Betsy Greenleaf answered

Specializes in Gynecology

Depends: Antibiotics can decrease the effectiveness of the piill. It is recommended to use a back up contraceptive such as condoms while on antibiotics. Not too much you can do at this time. Keep taking pills as recommended.

Answered 3/11/2015

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