144 Copyright © 2015 The Korean Movement Disorder Society LETTER TO THE EDITOR

Cefepime is a commonly prescribed antibiotic, but the fre-quency and incidence of its neurotoxicity are unknown.1 Com-mon symptoms of neurotoxicity include lethargy, confusion, agitation, global aphasia, seizures, coma, and myoclonus.2 Early discontinuation after the development of neurotoxicity is cru-cial to recovery and to reducing morbidity and mortality.3 The pathophysiology of cefepime-induced myoclonus is unknown. Much of the current literature does not describe debilitating jaw myoclonus.1,3-6 Here, we expand on our two previously-re-ported cases of cefepime-induced jaw myoclonus7 and intro-duce a new case. As in the first two cases, this case had varying degrees of renal and cardiac dysfunction7 contributing to symp-tom development. Although other antibiotics were used, the resolution of symptoms after cefepime discontinuation makes it the likely cause