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Educational Articles

Medications & Supplements

  • Meclizine is used off label and given by mouth in the form of a tablet to treat and prevent motion sickness and vomiting in dogs, cats, and small mammals. The most common side effect is sedation and sleepiness. Do not use in pets that are allergic to it. It should be used with caution in pets with concurrent prostate enlargement, bladder obstruction, heart failure, certain types glaucoma, or certain gastrointestinal obstructions. If a negative reaction occurs, please call your veterinary office.

  • Medicinal mushrooms are given by mouth and are used over the counter (and under veterinary supervision) to supplement the treatment of cancer and other conditions. Give as directed by your veterinarian. Side effects may include stomach upset, diarrhea, dizziness, and skin rash. Do not use in pets that are allergic to mushrooms, and use cautiously in pets that are pregnant, nursing, or have diabetes, clotting disorders, low blood pressure, immune-mediated disorders, liver problems, or kidney disease. If a negative reaction occurs, please call your veterinary office.

  • Medroxyprogesterone acetate is given by mouth or injection and is used off label to treat reproductive conditions, sexual behaviors, and certain types of dwarfism and alopecia. Give this medication as directed by your veterinarian. Common side effects include increased appetite, increased thirst, weight gain, sleepiness, or changes in personality. Do not use in pets that are allergic to it, pets with diabetes or uterine bleeding, or prior to puberty, during pregnancy, 1-2 months after a heat cycle, or to treat false-pregnancy. If a negative reaction occurs, please call your veterinary office.

  • Megestrol acetate is given by mouth in the form of a tablet or liquid and is used in dogs or off label in cats to postpone the heat cycle or to treat false pregnancy. It can also be used off label in male dogs to treat prostatic hypertrophy. Common side effects include increased appetite, weight gain, lethargy, and behavior changes, but more severe side effects are also possible. It should not be used in pregnant pets or pets with uterine disease, diabetes, or breast tumors. If a negative reaction occurs, please call your veterinary office.

  • Melatonin is given by mouth or as an implant under the skin and is used to treat sleep and behavior disorders, adrenal disease, and non-allergic hair loss, to suppress the heat cycle, and to improve breeding rates. Give as directed. Side effects are not common but may include sleepiness. Do not use in pets that are allergic to it. If a negative reaction occurs, please call your veterinary office.

  • Meloxicam (brand names Metacam, Meloxidyl, Loxicom, OroCAM) is given by mouth in the form of a liquid, capsule, or tablet to treat pain and inflammation in dogs, cats, and other small mammals. Do not use this medication in pets that are allergic to it, or in pets concurrently using corticosteroids or other NSAIDs. If a negative reaction occurs, call your veterinary office.

  • Methazolamide is given by mouth and is used off label to treat open angle glaucoma. Common side effects include vomiting, diarrhea, lack of appetite, sleepiness, disorientation, or excitement. 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. If a negative reaction occurs, please call your veterinary office.

  • Methimazole is an antithyroid medication used to treat hyperthyroidism. It is either 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. If a negative reaction occurs, call your veterinary office.

  • Methocarbamol is given by mouth or injection and is used on and off label to treat muscle spasms due to injury, inflammation, or certain toxicities. Give as directed by your veterinarian. The most common side effect includes sleepiness. Do not use methocarbamol in pets that are allergic to it. If a negative reaction occurs, please call your veterinary office.

  • Methylprednisolone is given by mouth or injection and is used on and off label to treat inflammatory, immune-mediated, or hormonal conditions. Common side effects include increased drinking, urination, and appetite, dull/dry haircoat, and/or weight gain. Do not use in pets that are allergic to it, receiving NSAIDs, that are recovering from a recent surgery, or in pets with systemic fungal or viral infections, diabetes, Cushing’s disease, stomach or intestinal ulcers. If a negative reaction occurs, please call your veterinary office.