Concerta
"I'm 17 and have been taking this for about a month now for ADHD. I started at small doses of Ritalin (10 mg) and then moved to 20 mg. My doctor thought it would be easier to just put me on Concerta since it's 18 mg a pill. I then took 36 mg of Concerta which didn't work out. I got major irritability and started feeling depressed. Even my focus was off. I went back down to 18 mg and it's working much better. No irritability, depression feeling. Make sure you're on the right dose for your body, too much can do more harm and too little may not do any thing."