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A double-blind trial of methocarbamol versus placebo in painful muscle spasm.

A double-blind trial of methocarbamol versus placebo was carried out in 59 matched pairs of patients suffering from painful muscle spasm. Methocarbamol (1500 mg. q.d.s.) was found to be effective in approximately 60% of patients compared with 30% of patients receiving placebo (p less than 0.01). Side-effects were of almost equal incidence in the two groups.