Methocarbamol is a medication used for short-term musculoskeletal pain. It may be used together with rest, physical therapy and pain medication. It is less preferred in low back pain. It has limited use for rheumatoid arthritis and cerebral palsy.

Metaxalone is a muscle relaxant used to relax muscles and relieve pain caused by strains, sprains and other musculoskeletal conditions. Its exact mechanism of action is not known, but it may be due to general central nervous system depression.

Metronidazole is an antibiotic and antiprotozoal medication. It is used either alone or with other antibiotics to treat pelvic inflammatory disease, endocarditis and bacterial vaginosis. It is effective for dracunculiasis, giardiasis, trichomoniasis and amebiasis.

Methylscopolamine or methscopolamine, usually provided as the bromide or nitrate salt, is an oral medication used along with other medications to treat peptic ulcers by reducing stomach acid secretion. Proton pump inhibitors and antihistamine medications have made this use obsolete.