1 definition by Dr.Feelgood2

A slang term for the stimulant drug methylphenidate (sold as ritalin,concerta,focalin ect).

Vitamin R is derived from amphetamine and is the closet pharmalogical equivalent of cocaine.

It is used as both a study aid and a recreational drug. When used recreationally it is typically snorted, with doses ranging from 20-40mgs, Although it is much more addictive when taken this way.
Bill:hey, You up for tonight?

Bob: fuck yeah! Is mad P gonna let us have some of his vitamin Rs?

Bill: hell yeah. Meet up his place about 8, chill for a while, get drunk. Then at 11 we'll snort 30mgs each and head out.

Bob: I'll bring a spliff for the come-down.

Bill: Cool. Remember, no booze after the vitamin R. Just because you're no longer intoxicated doesn't mean you're no longer drunk.

Bob; Agreed.
by Dr.Feelgood2 July 31, 2009
Get the Vitamin R mug.