Successuful treatment of paramyotonia congenita (Eulenburg): muscle stiffness and weakness prevented by tocainide.

Abstract
Recent studies have shown that the Na conductance of the sarcolemma is disturbed in paramyotonia. Tocainide is a new antiarrhythmic agent which seems to reduce effectively Na conductance. Patients [8] with paramyotonia were treated with tocainide, whereby the paramyotonic stiffness and weakness brought about by cooling could be prevented.