Beneficiality of combined levetiracetam, clonazepam for myoclonus in MERRF requires further confirmation

To the Editor: With interest, we read the article by Su et al[1] about the antiepileptic drug (AED) treatment of 17 patients with genetically confirmed myoclonic epilepsy with ragged-red fibers (MERRF) syndrome. It was found that monotherapy with either levetiracetam (LEV), clonazepam (CZP), valproic acid (VPA).