Benzedrine is the trade name of the racemic variant of amphetamine (dl-amphetamine). It was marketed under this brandname in the USA by Smith, Kline and French in the form of inhalers, starting in 1928. Benzedrine was used to enlarge nasal and bronchial passages and it is closely related to other stimulants produced later, such as Dexedrine (d-amphetamine) and methamphetamine.
No medical use was found for Amphetamine until the 1920s, when it was introduced in most of the world in the form of the pharmaceutical Benzedrine. This drug was used by the militaries of several nations, especially the air forces, to fight fatigue and increase alertness among servicemen. After decades of reports of abuse, the FDA banned Benzedrine inhalers, and limited amphetamines to prescription use in 1959, but illegal use became common.