Key takeaways
Methocarbamol (Robaxin) and chlorzoxazone (Lorzone) are both muscle relaxants used to treat muscle pain and discomfort, but they have some differences. Methocarbamol is typically taken 3 to 4 times a day and can be used for muscle problems due to tetanus in its injection form, while chlorzoxazone is taken 3 to 4 times a day for sudden muscle pain. Methocarbamol starts working within 30 minutes and lasts about 6 to 7 hours, whereas chlorzoxazone reaches its highest levels in the body within 1 to 2 hours. Methocarbamol is less likely to cause drowsiness compared to other muscle relaxers, but chlorzoxazone can cause severe liver damage and stomach bleeding in rare cases. Both medications can cause dizziness and drowsiness, so you should avoid driving or drinking alcohol while taking them. Chlorzoxazone is available as a lower-cost generic medication, while methocarbamol tablets can be cut in half if needed.
