Before starting methocarbamol, knowing about its drug interactions can help keep you safe. Some of these interactions can be managed, while others are more serious and should be avoided. Detailed Methocarbamol dosage information for adults and children. Includes dosages for Muscle Spasm and Tetanus; plus renal, liver and dialysis adjustments. 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 a muscle relaxer. It works by blocking nerve impulses (or pain sensations) that are sent to your brain. Methocarbamol is used together with rest and physical therapy to treat skeletal muscle conditions such as pain or injury. 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. Find patient medical information for Methocarbamol (Robaxin) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Learn about methocarbamol usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. 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] Methocarbamol is a prescription generic drug used to relieve acute musculoskeletal conditions. Learn about dosage, side effects, drug interaction, warnings, and precautions. Methocarbamol is used with rest, physical therapy, and other measures to relax muscles and relieve pain and discomfort caused by strains, sprains, and other muscle injuries.