ArticleMovement disorders clinical practice2021
An Open-Label Phase 2a Study to Evaluate the Safety and Tolerability of Perampanel in Cervical Dystonia.
Article in Movement disorders clinical practice, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- Efficacy and Safety of Sodium Oxybate in Isolated Focal Laryngeal Dystonia: A Phase IIb Double-Blind Placebo-Controlled Cross-Over Randomized Clinical Trial.Annals of neurology · 2025Trial
- An Exploratory, Randomized, Double-Blind Clinical Trial of Dipraglurant for Blepharospasm.Movement disorders : official journal of the Movement Disorder Society · 2024Trial
- Amplification of the therapeutic potential of AMPA receptor potentiators from the nootropic era to today.Pharmacology, biochemistry, and behavior · 2025Review
- Safety and Efficacy of the AMPA Receptor Antagonist Perampanel for Tremors: A Systematic Review.Acta medica Philippina · 2025Article
- [Is there scientific evidence for the use of perampanel in neuropathic pain?]Revista de neurologia · 2022Article
Corrections and comments
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Authors and funding
9 authors at 7 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundCervical dystonia (CD) is the most common focal isolated dystonia. Preclinical studies report that AMPA-selective glutamate receptor antagonists improve dystonia. Perampanel is a clinically available, AMPA receptor antagonist that has shown efficacy and safety in epilepsy.
objectivesTo determine safety and tolerability of perampanel in CD.
methodsWe performed a phase 2a, open-label, multicenter study to evaluate tolerability and safety of perampanel in CD. Included subjects had primary CD; those on botulinum toxin were 8 weeks post last injection. All subjects received perampanel 2 mg/day, titrated 2 mg weekly over 6 weeks, to maximum 12 mg/day; maintenance phase was 4 weeks, ending at week 10. Primary endpoints included tolerability, defined as ability to remain on perampanel for the maintenance period, at any dose level and safety, determined from adverse events (AEs) collected at each visit. Secondary exploratory endpoints included Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS), quality of life (cervical dystonia impact profile [CIDP]-58) and Clinical Global Impression of change (CGI).
resultsCD participants (n = 25) were recruited. Eight subjects withdrew; 4 because of AEs, 3 for other reasons and 1 lost to follow up. One subject tolerated 12 mg/day. Eight subjects (30.8%) tolerated 2 mg, whereas 19.2% tolerated 4 mg/day, and 15.4% tolerated 6 mg or 8 mg/day. All subjects experienced AEs. The most common AEs were dizziness, imbalance, and irritability. Exploratory endpoints of TWSTRS showed some improved pain scores and CIDP-58 improved sleep.
conclusionsTolerability to perampanel was variable in CD subjects. Lower doses would be considered for future studies in this population.
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