A benzyl alcohol derivative with vasodilator activity. The mechanism of action of isoxsuprine hydrochloride is controversial, because isoxsuprine has beta-adrenergic activities that could not be offset by beta-adrenergic blockers. Although stimulation of the beta adrenergic receptor increases blood flow to produce vasodilatation, this agent may also have direct effects on the contractility of smooth muscle. Additionally, isoxsuprine causes relaxation of uterine smooth muscle and may also produce positive inotropic and chronotropic effects on the myocardium.

A beta-adrenergic agonist that causes direct relaxation of uterine and vascular smooth muscle. Its vasodilating actions are greater on the arteries supplying skeletal muscle than on those supplying skin. It is used in the treatment of peripheral vascular disease and in premature labor.