text: preventing menstrual cycle? i've heard that there are medicines that can prevent menstrual cycle in women without having very serious side effect. is there such a medicine? and if so can you give me a name or a link to it?  i'm looking for medical answers only. you can take the birth control pill continuously, its probably the safest way... the nuvoring or the patch probably can be used in a similar way. i would stay far away from the depo shot that someone mentioned...i knew a girl that bleed for a month straight on depo...and with depo your stuck with it for the full 3 months (sometimes it takes 4 months to fully leave your system).  try looking into something like seasonal birth control pills (4 periods a year) http://www.pamf.org/teen/sex/birthcontrol/seasonale.html