A while ago, my doctor put me on .5 mg of Risperdal daily because I told him I was having trouble sleeping. A few months later, he took me off of it because I was no longer having sleep trouble. Last November, I acted on a dumb impulse to take the rest of a bottle of Risperdal I had laying around. It was only 5 mg, but it made me sick for about a week. Just when I thought I was getting better, I had a crazy panic attack that sent me to the ER. They did a bunch of tests and couldn't find anything significant, so they sent me home. Since then, I've had headaches, blurred vision, feelings of derealization, palpitations, fluttering in my chest. I've seen my physician, my optometrist and a cardiologist and nobody has been able to find out what's wrong with me. It's been six months and I'm scared I'll never feel back to normal. Does anybody know what I could have done to myself and if it will go away?