I take Zoloft and if you want to stop, you are supposed to wean yourself off of it. If you don't it can cause severe depression, which is probably why you got so down. There are conflicting opinions on anti depressants and weigh loss. I dont think I could have lost a lb without zoloft. On the other hand, my mother only finds that the antidepressant she takes (effoexor) only makes her gain more and more weight. If I were you, I'd talk to your doctor.