Ritalin, Ritalin SR, Ritalin LA ( Methylphenidate )
This is certainly the most frequently used drug for ADHD. It is a cousin of speed and cocaine. Unless you are a confirmed drug addict, you will not get high on this drug unless you crush it up and try to smoke it. When taken as a pill, it will not make you high, so it is not addictive. It requires no special monitoring.

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What about slow release Ritalin?
The good thing about sustained release Ritalin is you can give it once a day and it works for about 8 hours, but not 12. It does not work as well as regular Ritalin though. It is worth a try in a person who has a good response to regular Ritalin but who does not want to take the drug at school.