Keflex: Cephalexin ( Keflex) can impact efficacy of oral contraceptives - so use of a back up protection is recommended (such as a condom).
Answered 10/21/2015
2.1k views
Possible to get: pregnant as Cephalexin can decrease the effectiveness of the pill, Should use condoms as a backup measure if you are are on antibiotics. If you miss a period do a pregnancy test. If within 72 hours can take plan B.
Answered 10/21/2015
2.1k views
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