... used in the treatment of hypertension and Name: Phentolamine mesilate, Phentolamine mesylate, Phentolamine hcl, Phentolamine hydrochloride, Phentolamine.A nonselective alpha-adrenergic ... of hypertension and hypertensive emergencies, pheochromocytoma, vasospasm of raynaud disease and frostbite, clonidine withdrawal syndrome, impotence, and peripheral vascular disease Phentolamine hydrochloride