0 a brand name for a drug that is a type of amphetamine (= a drug that makes the mind or body more active):
In the 1930s, amphetamines were marketed as Benzedrine in an over-the-counter inhaler to treat nasal congestion.
She had made excessive use of stimulants and depressants, in particular Benzedrine and alcohol.
I think they must have been on Benzedrine.
In the old days crews relied on Benzedrine and the like to keep them awake.
