Phentolamine mesylateProduct ingredient for Phentolamine

Phentolamine is a reversible, non-selective alpha-adrenergic blocker that induces vasodilation. While initially introduced to the market for the treatment of hypertension, this clinical use was halted due to cardiovascular and gastrointestinal adverse effects with the prolonged use of large oral doses of phentolamine.^1,4 It has several therapeutic uses, including the treatment of hypertensive episodes, prevention of norepinephrine-induced extravasation, diagnosis of pheochromocytoma, reversal of soft-tissue anesthesia, and treatment of pharmacologically-induced mydriasis.^8,7,5 Phentolamine is administered intravenously, intramuscularly, submucosally, and topically.