Abstract
Introduction: More than 90% of amyotrophic lateral sclerosis (ALS) patients have muscle cramps, but evidence-based treatments have not been available. Methods: A multicenter, double-blind, placebo-controlled crossover trial of mexiletine 150 mg twice daily was conducted in ALS patients requesting treatment of symptomatic muscle cramps. Results: Muscle cramp frequency was reduced in 18 of 20 patients; 13 reductions were attributed to treatment (P < 0.05). The average reduction, based on t tests, was 1.8 cramps per day (a reduction from 5.3 with placebo to 3.5 with mexiletine). The estimated reduction of cramp severity was 15 units on a 100-unit scale (P = 0.01) from a baseline average of 46. No effect on fasciculations was noted. One patient discontinued the study because of dizziness, and another patient discontinued the study to start open-label mexiletine therapy. No serious adverse event occurred. Discussion: Mexiletine is a well tolerated and effective medication for controlling the symptom of muscle cramps in ALS. Muscle Nerve 58: 42–48, 2018.
Original language | English (US) |
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Pages (from-to) | 42-48 |
Number of pages | 7 |
Journal | Muscle and Nerve |
Volume | 58 |
Issue number | 1 |
DOIs | |
State | Published - Jul 2018 |
Keywords
- Muscle cramp
- amyotrophic lateral sclerosis
- fasciculations
- neuromuscular
- quality of life
ASJC Scopus subject areas
- Physiology
- Clinical Neurology
- Cellular and Molecular Neuroscience
- Physiology (medical)