Abstract
Propafenone hydrochloride, a class IC antiarrhythmic drug, is used in the treatment of ventricular and supraventricular arrhythmias. Herein we describe a patient with episodic jabbing and crushing pain in his hands and feet, aching in his forearms, and hyperesthesias of his extremities. He had been taking propafenone for 1 year because of ventricular arrhythmias. Results of a nerve conduction velocity test were abnormal. Electron microscopic findings on a sural nerve biopsy specimen represented distal small fiber neuropathy. Findings on a thermoregulatory sweat test and on autonomic tests were abnormal, compatible with a distal small fiber neuropathy. To our knowledge, peripheral neuropathy has not previously been reported to occur with use of propafenone. In this patient, propafenone seemed to be responsible for the development of peripheral neuropathy, which resolved after use of the drug had been discontinued.
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