So glad you said that daylilyfan! My dr switched me to topomax today, at my suggestion . . . Neither the dr nor the pharmacist said a thing about it making my bc less effective, but I put them in my interaction checker and topomax does decrease the efficiancy of some bcp, it speeds up your metabolism so the hormones don't last all day in your body like they are designed to.

You saved me from what could have been an unwelcome surprise I want to have kids, just not right now.