Is ritalin a amphetamine?

does that mean I am taking a unofficial substance for my problem?Is ritalin a amphetamine?
It's an amphetamine cogener, and if you have a valid prescription it (or most of the classic amphetamines) is lawful. If you're borrowing it from a friend, then, yes, that's a felony.
Ritalin is methyphenidate. It is a powerful stimulant, but the other drug commonly used for ADHD, ADDeral, is the amphetamine. It is certainly the right handed entaniomer (chemical mirror model of itself) of amphetamine called dextroamphetamine.