Abstract

The aim of this study was to assess the safety and efficacy of perampanel in patients with refractory essential tremor (ET). We recruited patients from our movement disorders clinic with the diagnosis of severe refractory ET, and perampanel 4 mg at night was initiated.Assessments were conducted at baseline and after 1 month of treatment with perampanel 4 mg/d. Details about tolerance and effectiveness were collected. Clinical evaluation was conducted with the Fahn-Tolosa-Marín scale, and statistical analysis was carried out with Wilcoxon matched pairs signed rank test. This study included 18 patients with severe ET (11 females, 7 males; mean age: 75.1 ± 12.03 years; mean duration of ET: 17.4 ± 17.03 years). Perampanel significantly improved patients' average score with refractory ET ( P ≤ 0.0001). This improvement has been occasionally quite relevant. However, a proportion of patients did not tolerate perampanel because of several adverse effects including dizziness, ataxia, irritability, and instability. Perampanel had a markedly positive antitremor effect in patients with ET and could be an alternative treatment. However, this drug is not devoid of adverse effects.

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