Dantrolene
Chemical compound / From Wikipedia, the free encyclopedia
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Dantrolene sodium, sold under the brand name Dantrium among others, is a postsynaptic muscle relaxant that lessens excitation-contraction coupling in muscle cells.[3][4][5] It achieves this by inhibiting Ca2+ ions release from sarcoplasmic reticulum stores by antagonizing ryanodine receptors.[6] It is the primary drug used for the treatment and prevention of malignant hyperthermia, a rare, life-threatening disorder triggered by general anesthesia or drugs. 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 poisoning by 2,4-dinitrophenol[7][8] or by the related compounds dinoseb and dinoterb.[9]
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Trade names | Dantrium, Revonto, Ryanodex |
AHFS/Drugs.com | Monograph |
MedlinePlus | a682576 |
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Routes of administration | By mouth, intravenous |
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Bioavailability | 70% |
Metabolism | Liver |
Excretion | Bile duct, kidney |
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ECHA InfoCard | 100.027.895 |
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Formula | C14H10N4O5 |
Molar mass | 314.257 g·mol−1 |
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The most frequently occurring side effects include drowsiness, dizziness, weakness, general malaise, fatigue, and diarrhea.[3][4]
It is marketed by Par Pharmaceuticals LLC as Dantrium (in North America) and by Norgine BV as Dantrium, Dantamacrin, or Dantrolen (in Europe). A hospital is recommended to keep a minimum stock of 36 dantrolene vials totaling 720 mg, sufficient for a 70-kg person.[10]