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A method is presented for analyzing the probable effectiveness of blocking drugs in relieving vasospasm in the extremities, and comparison is given of the relative potency and side effects of 4 adrenergic blocking drugs and of their effects on heart rate, arterial pressure, and cardiac output, as estimated from a "circulatory index." Data are also given on the use of these drugs in evaluation of the circulation in patients.

Comparison in Man of Adrenergic Blockade Produced by Dibenzyline, Ilidar, Priscoline, and Regitine