noun. A stimulus within the central nervous system, tightly correlated in terms of construction and functioning to ephedrine, which is the paradigm of the classification of drugs referred to as amphetamines. American brand name: Benzedrine, amphetamine misuse in DSM-IV-TR, a trend of usage of amphetamines or compounds similar to it developed by repetitive and substantial negative consequences tied in with the recurring consumption of said compounds. Identification is preceded by the identification of dependency toward amphetamines. If requirements for amphetamine dependency and abuse are both satisfied, then the second diagnosis is rendered too.