NMD Pharma ApS has described chloride channel protein 1 (CLCN1; ClC-1) channel blockers reported to be useful for the treatment of myasthenia gravis, Lambert-Eaton syndrome, critical illness myopathy, amyotrophic lateral sclerosis, spinal muscular atrophy, Guillain-Barré syndrome, post-poliomyelitic and chronic fatigue syndrome, among others.