"i am 19 years old and i have been using aviane for two weeks now and right away i noticed increased libido but major mood swings. i gain and lose weight pretty quickly so i would have known by now if it causes weight gain, and it doesn&#039;t. the only down-side for me is the mood swings, but i noticed that it&#039;s manageable with a small cup of coffee; i feel better instantly. all in all, this is a pretty good pill. the reason i changed pills was because of decreased libido with loestrin 24."