birth control
"I've been on this pill for about 3 months.  In this time, I've gained some weight.  I go to the gym 5-6 times a week and am a pretty health conscious person so there is no reason for this to happen.  I've never had a problem with my skin but over the last 3 months I haven't gone a day without a pimple on my face, and my back and chest are not okay.  I feel so gross.  I do so much to take care of myself and after looking at my daily life, the only thing I can attribute these things to is my pill.  It is also the only medication I take."