Yes: Ritalin is a stimulant called methylphenidate, it can have all the side effects of any other stimulant such as amphetamines or cocaine. The paradoxical - or 'opposite' effect - of calming people w/ add or adhd is part of verifying the dx. If you have the disorder - it quiets you, if not it speeds you up. http://www.ncbi.nlm.nih.gov/pmc/articles/pmc3062130/.
Answered 7/1/2014
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