Phentolamine

Phentolamine, sold under the brand name Regitine among others, is a reversible[1] nonselective α-adrenergic antagonist.[2] Contents 1 Mechanism 2 Uses 3 Chemistry 4 Adverse effects 5 References 6 External links Mechanism Its primary action is vasodilation due to α1 blockade.[3] Non-selective α-blockers can cause a much more pronounced reflex tachycardia than the selective α1 blockers. Like the selective α1 blocker... [wikipedia]