Methylphenidate is highly addictive... https://en.wikipedia.org/wiki/Methylphenidate https://en.wikipedia.org/wiki/Methylphenidate Though I'll grant you we do

Methylphenidate is highly addictive... https://en.wikipedia.org/wiki/Methylphenidate https://en.wikipedia.org/wiki/Methylphenidate Though I'll grant you we don't have data for long-term effects. https://www.sciencedirect.com/science/article/pii/S0149763419302350?via%3Dihub https://www.sciencedirect.com/science/article/pii/S014976341... Further, as you pointed out does have benefits (which is I assume why it's prescribed). Cocaine and meth have similar effects btw (pros and cons), abuse is what causes the issue(s). People can survive on both for decades though.