I was on 150 mg/day of Zoloft for 6 years. I had the exact opposite side-effect that the other posters are experiencing. I would ejaculate within 3 seconds of penetration (much to my GF's chagrin). I eventually had to quit the Zoloft cold-turkey as the nausea it caused became so severe, I was vomiting 5-6 times per day. Good luck to the OP!