A stimulating drug that affects the brain and the body in a variety of ways, also known by the trade name Benzedrine. Chemically, amphetamine is a racemic mixture of the l and d isomers of α-methyl-β-phenethylamine. The l isomer has more pronounced effects on the body, while the d isomer (commonly referred to as Dexedrine) has a greater effect on the brain. On the whole, the pharmacological effects of amphetamine are to produce an increase in blood pressure, a relaxation of bronchial smooth muscle, a constriction of the blood vessels supplying the skin and mucous membranes, and a variety of alterations in behavior.