I was prescribed 50mg Sertraline and took the first one on Monday morning. During Monday night I had awful side effects - diarrhoea, nausea, weak and sweating on bathroom floor. The next four mornings I've taken half a tab each day. I feel the side effects are decreasing. I'm now afraid to go back to taking full tab and am wondering if half (25mg) will help my anxiety - which includes racing heart, constantly feeling on edge and can't relax. Is anyone maintaining on 25?