A drug which has a stimulant influence on the nervous system that may be both literally and mentally addicting whenever overused. Amphetamine has-been a lot abused recreationally. The street term 'speed' means stimulant medicines eg amphetamine.
1938, contracted from alphamethyl-phenethylamine.
a central nervous system stimulant that increases energy and decreases appetite; regularly treat narcolepsy plus some forms of depression