Vaughn Williams Classification

Differ in speed and onset, duration of action Non-selective Blockers. Phentolamine Indicated for pheocromocytoma. Blocking α1 causes vasodilation; reducing BP. Blocking α2 removes inhibition, increasing NE action on β receptors ( increasing HR and cardiac output Prazosin, Terazosin, etc Selective α1 Blocker ................
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