Reduced efficacy of perampanel in patients with severe motor and intellectual disabilities syndrome and drug-resistant epilepsy: A single-center analysis from Japan

Abstract

People with severe motor and intellectual disabilities syndrome (SMIDS) have multiple comorbidities and high mortality rates. This study examined whether there is a difference in the efficacy and tolerability of perampanel (PER) between patients with drug-resistant epilepsy with or without SMIDS. The study identified 65 patients with drug-resistant epilepsy who underwent PER treatment as adjunctive therapy. The 50 % responder rate was 22 % (14/65) overall and 11 % (5/44) in patients with SMIDS versus 43 % (9/21) in patients without SMIDS (p <0.01). Although the overall 50 % responder rate was similar to those of previous reports, PER was less efficacious in the patients with SMIDS; nevertheless, PER was tolerated in the patients with SMIDS.