Abstract
Calcium channel and beta-adrenergic receptor antagonists are common pharmaceutical agents with multiple overlapping clinical indications. When used appropriately, these agents are safe and efficacious. In overdose, however, these agents have the potential for serious morbidity. Calcium channel blockers and beta blockers share similar physiological effects on the cardiovascular system, such as hypotension and bradycardia, in overdose and occasionally at therapeutic doses. The initial management for symptomatic overdose of both drug classes consists of supportive care measures. Other therapies including administration of glucagon, calcium, catecholamines, phosphodiesterase inhibitors and insulin have been used with varying degrees of success. In addition, intra-aortic balloon pump and extracorporeal membrane oxygenation techniques have been successfully utilized in refractory cases. This article reviews beta blocker and calcium channel blocker pharmacological principles and updates current management strategies.
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