Dantrolene sodium is a muscle relaxant that is currently the only specific and effective treatment for malignant hyperthermia. It is also used in the management of neuroleptic malignant syndrome, muscle spasticity (e.g. after strokes, in paraplegia, cerebral palsy, or patients with multiple sclerosis) and ecstasy intoxication.
The related substance azumolene is under development for similar indications. It has a bromine residue instead of the nitrite group, and is 30 times more water-soluble.
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