ADHD
"I have been taking this for 10 years (started at 18 mg, went up to 36 mg). Recently (several months ago), I developed several horrible side-effects. For example: it made me feel nervous. I could not keep still. It also made me extra irritable (to the point I was yelling at my friends for the littlest things). I also felt depressed (to the point I did not want to get out of bed at all) and could not sleep. The doctor brought me down to 18 mg, symptoms did not improve. I immediately stopped taking this and felt 100% better the next day. The doctor put me on Adderall XR which works a lot better with very little side-effects. Please avoid Concerta if possible."