"i started taking zoloft over a year ago, and at first it improved my mood 90%.  that was senior year of high school.  then i started college, my increased stress also had me increase my dose from 50-75 mg.  since then i have gained 45 lbs, had a severe decrease in my sex drive, and upon increasing to 100mg, have been so apathetic and just not wanting to do anything.  i am 19.  shouldn&#039;t really happen for me.  for some people it works great, for me, i&#039;m just going cold turkey from here out."