depression
"I started taking Zoloft October of 2011. Although it has helped me tremendously with anxiety, depression, and severe mood swings. It makes me very tired and withdrawn. And I've gained 20 lbs since October 2011! I haven't seen a lot of reviews with this type of side effect for Zoloft, but I know I'm not over eating to that degree.  3lbs I gained since my Dr visit last week. My Dr lowered the dosage by 1/2. But needless to say the weight gain is more depressing then anything."