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• Meropenem

  Meropenem is an antibiotic used to treat multi-drug-resistant bacterial infections in cats and dogs, particularly infections caused by extended-spectrum beta-lactamase-producing Enterobacterales or Pseudomonas aeruginosa. Its use in veterinary medicine is limited to susceptible infections with documented resistance to other antimicrobials. Its use is off label in veterinary medicine. Meropenem comes in an injectable form.

• Methazolamide

  Methazolamide (brand names Neptazane®, GlaucTabs®, Glaumetax®, MZM) is a carbonic anhydrase inhibitor used off label (extra label) to treat open angle glaucoma in dogs and cats. Do not use in pets that are allergic to it, have significant liver, kidney, or adrenal disease, have electrolyte imbalances, have severe obstructive lung disease, or have closed angle glaucoma.

• Methimazole

  Methimazole (brand names Tapazole®, Felimazole®, Felanorm®) is an antithyroid medication used to treat hyperthyroidism in cats. It is given by mouth or applied topically to the skin. Common side effects include vomiting, anorexia, and tiredness, but more severe side effects are possible. It is contraindicated in pregnant or nursing pets, as well as in cats with autoimmune disease, liver or kidney disease, and/or blood and clotting diseases.

• Methionine

  Methionine (brand name Methio-Form) is a nutritional supplement used to make urine more acidic in cats and dogs. Urine acidifiers help manage certain types of urolithiasis (urinary stones). Methionine comes in gel, chewable, powder, and tablet forms. Monitor urine pH and seek immediate veterinary care if signs of Heinz-body anemia appear in cats (pale gums, red-brown urine, weakness).

• Methocarbamol

  Methocarbamol (brand names: Robaxin®, Robinax®, Robaximol®) is a muscle relaxant used to reduce muscle spasms associated with inflammation, injury, intervertebral disc disease, and certain toxicities. It is used only in companion animals. It is given by mouth as a tablet.

• Methylprednisolone

  Methylprednisolone is given by mouth or injection and is used on and off label in dogs, cats, and horses to treat inflammatory, immune-mediated, and hormonal conditions. Common side effects include increased drinking, urination, and appetite, dull/dry haircoat, and/or weight gain.

• Metoclopramide

  Metoclopramide (brand names Reglan® and Maxolon®) is used off label in dogs, cats, and small mammals to stimulate movement in the stomach and upper small intestines to prevent esophageal reflux. In cats and dogs, it is used in the treatment or prevention of vomiting, and also to induce milk let-down and to promote milk production.

• Metoprolol

  Metoprolol is a beta-blocker used to treat certain heart rhythm problems and hypertension (high blood pressure) in cats and dogs. It has also been used in the treatment of hypertrophic cardiomyopathy (HCM) in cats. It is used off label (extra label) in veterinary medicine.

• Metronidazole

  Metronidazole (brand name Flagyl®) is used off label in the treatment of certain infections, such as those caused by Giardia and Trichomonas, in dogs, cats, small mammals, birds, reptiles, and other animals. It is often used to treat diarrhea and other intestinal problems.

• Miconazole + Chlorhexidine + Tris-EDTA Topical

  Miconazole + chlorhexidine + tris-EDTA topical (brand name MiconaHex+Triz®) is an antifungal and antimicrobial cleansing agent used in the treatment of surface skin infections and to enhance the effectiveness of other topical antibiotics in cats and dogs. It comes in spray, mousse, shampoo, and wipe forms.