Anxiety
"I started having frequent panic attacks and anxiety spikes and my doctor suggested Lexapro. I had really bad nausea and lack of appetite the first week and had to force myself to eat to ease the hunger pains. After that subsided, I had a lot of muscle tension and soreness. It felt like my whole body was vibrating as if being electrically shocked. I was fidgeting all day, sitting in unusual postures, mistyping far more than usual, and knocking things over on my desk. After four weeks the panic attacks had stopped and my anxiety had improved slightly, but the muscular side-effects had me even more worried. I called my doctor and he switched me back to Sertraline. Tapering off Lexapro made the vibration and tension go away almost immediately."