When I decided to go on the pill 3 yrs ago, I asked my gyno for a pill that would not make me gain weight. She gave me Levlite and it's been GREAT! Not only did I NOT gain any weight, the only side effects I had were a little lightheadedness and slight nausea the first 3 days - that's it. :D I can't say enough about it, but maybe we all react differently to different pills.