given by injection causes blood vessels to expand, thereby increasing blood flow; when injected into the penis, it increases blood flow to the penis, which results in an erection. see also papaverine, " bimix", " trimix"
A drug that acts to increase genital blood flow and smooth muscle relaxation that is currently being tested as a treatment for female sexual arousal disorder.
Phentolamine is a reversible nonselective alpha-adrenergic antagonist. Its primary action is vasodilation. The primary application for phentolamine is for the control of hypertensive emergencies, most notably due to phaeochromocytoma (pheochromocytoma).