Painful muscle spasm reversed by magnesium sulphate. A case report
Clinton, C.W.; Braude, B.M.; James, M.F.
South African Medical Journal 68(5): 332-333
1985
ISSN/ISBN: 0256-9574 PMID: 4035497 Document Number: 245464
A 25-year-old paraplegic man who had sustained a T3/T4 vertebral compression fracture 3 years previously presented with severe, painful spasm of the left hamstring muscle group of 2 hours' duration. This spasm produced extreme knee flexion of a degree which held the left foot posterior to the right buttock. An intravenous injection of 2 g magnesium sulphate produced immediate relief. Possible mechanisms of action of magnesium are discussed.