Merck Manual

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Skeletal Muscle Relaxants

Skeletal Muscle Relaxants

Drug

Dosage

Dantrolene

Horses: 15–25 mg/kg, slow IV, 4 times a day; 2 mg/kg per day, PO, for prevention of exertional rhabdomyolysis

Swine: 3.5 mg/kg, IV

Diazepam

Cats: 0.5 mg/kg, IV; 2–5 mg, PO, 3 times a day, for urethral obstruction

Guaifenesin

Dogs: 33–88 mg/kg, IV

Horses, ruminants: 66–132 mg/kg, IV

Methocarbamol

Dogs, cats: 44 mg/kg, IV, up to 330 mg/kg per day for tetanus or strychnine poisoning; 66–132 mg/kg per day, PO, divided 2–3 times a day

Horses: 2.2–55.5 mg/kg, IV; 5 g twice a day