I have recently read that antibiotics can decrease the efficacy of the pill, and I'm a little concerned. Right now, I am on the pill and taking meds for a bladder infection (macrobid). My doctor, fully aware that I would be taking both, did not mention any risks. Should I be using secondary contraception? If so, for how long? I assume the length I take the antibiotics would influence how long the pill is ineffective; I have a prescription for five days (ten pills).

If anyone could answer my questions about the effect of antibiotics that would be greatly appreciated! Thanks.

*sunshine*

I have recently read that antibiotics can decrease the efficacy of the pill, and I'm a little concerned. Right now, I am on the pill and taking meds for a bladder infection (macrobid). My doctor, fully aware that I would be taking both, did not mention any risks. Should I be using secondary contraception? If so, for how long? I assume the length I take the antibiotics would influence how long the pill is ineffective; I have a prescription for five days (ten pills).

If anyone could answer my questions about the effect of antibiotics that would be greatly appreciated! Thanks.

*sunshine*


First of all, not all antibiotics affect the pill. But, Macrobid is one of those antibiotics that can affect the pill. You will need to use a back-up method if you have sex for AT LEAST 7 days after taking your last pill.

Many physicians are totally unaware of drug interactions. Pharmacology is only a small part of their education, and failure to keep up with new products/interactions leaves many doctors in the dark. This is why the pharmacy is so important-- to detect such interactions that the doctors aren't aware of.