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  • Title: Amantadine: A new treatment for refractory electrical status epilepticus in sleep.
    Author: Wilson RB, Eliyan Y, Sankar R, Hussain SA.
    Journal: Epilepsy Behav; 2018 Jul; 84():74-78. PubMed ID: 29754107.
    Abstract:
    PURPOSE: Electrical status epilepticus in sleep (ESES) is an electrographic abnormality linked to language abnormalities and cognitive dysfunction and specifically associated with Landau-Kleffner syndrome (LKS), the syndrome of continuous spike and wave in slow-wave sleep (CSWS), and autistic regression with epileptiform EEG (AREE). As first-line therapies for treatment of ESES display inadequate efficacy and confer substantial risk, we set out to describe our center's experience with amantadine in the treatment of ESES. METHODS: Patients with video-EEG-confirmed ESES who received amantadine were retrospectively identified in a clinical EEG database. Spike-wave index, before and after amantadine exposure, was compared in a pairwise fashion. In an exploratory analysis, we cataloged reported changes in language functioning, cognition, and autistic features, which accompanied treatment. RESULTS: We identified 20 patients with ESES-associated syndromes. Median cumulative weighted average amantadine dosage was 2.1 mg/kg/d (interquartile range (IQR): 1.1, 4.5), and median duration of therapy was 11.5 months (IQR: 7.8, 26.6). In comparison with median baseline spike-wave index (76%), post-amantadine spike-wave index (53%) was reduced, with P = 0.01. Six (30%) patients exhibited complete (or nearly complete) resolution of ESES. A majority of patients exhibited subjective cognitive, linguistic, or behavioral benefit. Amantadine was generally well-tolerated despite substantial dosage and duration of therapy. CONCLUSIONS: This study suggests that amantadine may be effective in the treatment of ESES-associated syndromes but warrants replication in a more rigorous study.
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