The heart and hyperthyroidism. Use of beta-adrenergic blocking drugs

Many of the manifestations of hyperthyroidism are secondary to increased adrenergic activity. In recent years the beta adrenergic blocking drugs, as represented by d,1-propranolol, have become the agents of choice for ameliorating the adrenergic signs and symptoms of hyperthyroidism. Propranolol improves the tachycardia, tremor, restlessness, anxiety, and myopathy.