Hi. I have been on Triphasil for most of the 5 years I've been on birth control (I was on Ortho Tricyclen for a year and was on Trivora (generic of Triphasil) for a few months because my doctor didn't have the Triphasil samples in her office at my appointment one year so she gave me Trivora samples instead). I didn't have weight gain on any of them, the only real side effects I had was some nausea on Trivora. I know each person is different and what works for one may not work for all, but anyway, hope it helps and hope you get birth control that works for you with minimal side effects, if any.