Methocarbamol

Indications

INDICATIONS AND USAGE The injectable form of methocarbamol is indicated as an adjunct to rest, physical therapy, and other measures for the relief of discomfort associated with acute, painful musculoskeletal conditions. The mode of action of this drug has not been clearly identified, but may be related to its sedative properties. Methocarbamol does not directly relax tense skeletal muscles in man.

Dosage and administration (summary)

DOSAGE AND ADMINISTRATION For Intravenous and Intramuscular Use Only. Total adult dosage should not exceed 30 mL (3 vials) a day for more than 3 consecutive days except in the treatment of tetanus. If the condition persists, a like course may be repeated after a drug-free interval of 48 hours. Dosage and frequency of injection should be based on the severity of the condition being treated and therapeutic response noted. For the relief of symptoms of moderate degree, one dose of 1 gram (one 10 mL vial) may be adequate. Ordinarily this injection need not be repeated, as the administration of the oral form will usually sustain the relief initiated by the injection.

Contraindications

CONTRAINDICATIONS Methocarbamol Injection should not be administered to patients with known or suspected renal pathology. This caution is necessary because of the presence of polyethylene glycol 300 in the vehicle. A much larger amount of polyethylene glycol 300 than is present in recommended doses of Methocarbamol Injection is known to have increased pre-existing acidosis and urea retention in patients with renal impairment.

Warnings and precautions

WARNINGS Since methocarbamol may possess a general CNS depressant effect, patients receiving Methocarbamol Injection should be cautioned about combined effects with alcohol and other CNS depressants. Safe use of Methocarbamol Injection has not been established with regard to possible adverse effects upon fetal development. There have been very rare reports of fetal and congenital abnormalities following in utero exposure to methocarbamol.

Pregnancy

Pregnancy Teratogenic Effects Animal reproduction studies have not been conducted with methocarbamol. It is also not known whether methocarbamol can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Methocarbamol Injection should be given to a pregnant woman only if clearly needed.

Storage and supply

Storage Conditions Store at 20° to 25°C (68° to 77°F). AFTER MIXING WITH INTRAVENOUS INFUSION FLUIDS, DO NOT REFRIGERATE . Discard unused portion. Sterile, Nonpyrogenic, Preservative-free . The container closure is not made with natural rubber latex . sagent ® Mfd.

Source: Methocarbamol (Methocarbamol) — US FDA prescribing information, 2025-09-29, DailyMed. Summarised and shortened; the full label governs. Iranian registration, indications and labelling may differ.