Does anyone have a definitive answer to the ongoing controversy of antibiotics blocking the actions of anovulatory agents. Many young females hesitate to subscribe to antibiotic therapy because of various anecdotal reports on the subject. It is my understanding that griseofulvin and sulfonamides are more likely to interfere than standard antibiotics.
Tetracyclines are also on the list, however there is a theoretical problem with any antibiotic.
Unfortunately, there will be no definitive answer as to whether a drug does or does not interfere with BCPs. All of the metabolism mavens I've talked to say about the same thing.