my son has adhd and has been on ritalin for 2 years he now takes the capsules they are called concerta they are 36mg they are the time release ones. ive still got a few boxes of 10ml tabs floating around that he no longer uses. my son was really bad before the ritalin and it does work. i didnt want him to take them but after 2 years of saying no realised that they could help and they do..