Detailed Methocarbamol dosage information for adults and children. Includes dosages for Muscle Spasm and Tetanus; plus renal, liver and dialysis adjustments. Methocarbamol 500 mg is a muscle relaxant used to relieve discomfort from acute musculoskeletal conditions like back strains, neck pain, and muscle spasms. It works by calming activity in the central nervous system rather than acting directly on the muscles themselves. Methocarbamol is a medication used to relieve muscle spasms, and relax neck and jaw muscle contraction (lockjaw) caused by tetanus, a serious bacterial infection. Methocarbamol is used to relieve the discomfort caused by acute (short-term), painful muscle or bone conditions. However, this medicine does not take the place of rest, exercise, physical therapy, or other treatment that your doctor may recommend for your medical problem. Methocarbamol 500 mg treats acute muscle spasms and pain. Learn how it works, dosage, side effects, interactions, and how to save on the cost. Find patient medical information for Methocarbamol (Robaxin) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Methocarbamol is a centrally acting skeletal muscle relaxant that has significant potential adverse effects, especially on the central nervous system. [3] Potential side effects of methocarbamol include: Most commonly drowsiness, blurred vision, headache, nausea, and skin rash. [8] What’s the typical methocarbamol dosage for adults? Methocarbamol comes in 500 mg and 750 mg tablets. The recommended dosage depends on which tablets you’re taking. Generally, it’s recommended to start with 6 g to 8 g of methocarbamol per day (in divided doses) for the first 2 to 3 days. Methocarbamol is a muscle relaxant used to relieve pain and discomfort from muscle spasms. Learn about uses, dosage, side effects, and warnings. It's used to treat muscle pain and discomfort, like back pain, in people ages 16 years and older. It works best when used along with non-medication treatments, such as rest and physical therapy. Methocarbamol is taken by mouth, typically 3 or 4 times daily.