Vasorin is an antispasmodic drug that works to constrict blood vessels associated with acute myocardial infarction, angina pectoris, pulmonary and peripheral vascular occlusion, and peripheral vascular disease in which there is a vasospasm component and with certain cerebral vasospasm. Intracavernous injection for impotence Papaverine belongs to a group of medicines called vasodilators. Vasodilators work by widening blood vessels, which increases blood flow. Papaverine is used to induce an erection in some men with erectile dysfunction