Propranolol-induced hypertension in treatment of cocaine intoxication.

The case of a patient with apparent cocaine toxicity and drug-mediated hypertension and tachycardia is presented. IV propranolol was used as the initial treatment for his hyperadrenergic state, resulting in a decrease in heart rate but a paroxsymal increase in blood pressure. The patient required nitroprusside for control of elevated blood pressure. A mechanism of unopposed alpha stimulation as a result of beta-2 receptor blockade is proposed, and a cautious approach to the use of propranolol in these patients is suggested.