i was on it for about a year and a half and i have never had any problems with PMS symptoms but about 3 months after i started taking it I would have mood swings. My libido also went down and I began gaining weight around my hip area. This past fall i stopped taking it b/c my husband and i were ready for children. I stopped in September and then I did not have a period until I had to take Provera from my doctor. We were hoping that this would just help my system get started back but it did not and we had to then take Clomid to successfully become pregnant. There are many other sites talking about this particular drug and many women have had the same issues.