Could you tell me what is the full form of amphetamine?

Don't understand ?: or what "full" form means. Amphetamine can be the mixture of the right handed and left-handed molecules (racemic amphetamine), the more active form dextro or d-amphetamine (dexedrine) or the even more potent methamphetamine. There are many more synthetic versions of stimulants that have different activities and differing potential uses, side effects.