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  • Milbemycin otic (brand name MilbeMite Otic solution) is an antiparasitic medication used to treat ear mite infestations in cats and kittens four weeks of age or older. Milbemycin otic comes in liquid drop form (in pre-measured ampules).

  • Milbemycin oxime is a heartworm disease preventive and treats internal parasites in dogs and cats (e.g., hookworms and roundworms). It is also used off label to treat infestations in dogs. Milbemycin is given by mouth with a flavored oral tablet.

  • Feline miliary dermatitis is a skin condition that typically results from an underlying allergic reaction, most commonly to fleabites. An affected cat will have a very itchy rash and may lick, bite, and scratch at the affected skin, quickly progressing to small lesions with scabs on them. The offending allergen must be removed for long-term resolution.

  • Minocycline (brand names Minocin®, Solodyn®, Arestin®) is a tetracycline-based antibiotic. It is used to treat a variety of bacterial infections in cats and dogs. It is frequently used as part of the heartworm adulticide treatment protocol and for certain tick-borne infections, such as Lyme disease.

  • Mirtazapine (brand name: Remeron®, Mirataz®) is an antidepressant often used to treat weight loss and anorexia (loss of appetite), mainly in cats. It also has antiemetic (anti-vomiting) and anti-nausea effects and has been used to treat side effects of chemotherapy. Rarely, it may be used to treat behavioral problems.

  • Miscarriage (spontaneous abortion) refers to the death of a fetus during pregnancy. It can occur at any time during pregnancy, though the signs vary depending on the stage at which it occurs. This handout discusses signs, diagnosis, and treatment.

  • Misoprostol (brand names Cytotec®, Arthrotec®) is a prostaglandin E1 analog drug. It is used off label (extra label) to treat or prevent stomach ulcers due to NSAID use in cats, dogs, and horses. It can also be used in combination with other medications to treat uterine infections, protect the kidneys, treat skin allergies, or to terminate pregnancy.

  • Mole and gopher baits are poisonous products that are often flavored to attract unwanted pests. If a dog or cat ingests one, it can cause significant illness in your pet. The most common active ingredients used in mole and gopher baits are zinc phosphide and bromethalin. There is no antidote, so decontamination within an appropriate time is key to a good outcome.

  • Molidustat (brand name Varenzin-CAI) is a medication used to treat anemia (low red blood cell number) in cats with chronic kidney disease. Molidustat helps increase red blood cell production. It is conditionally approved for use in cats only. It comes in liquid suspension form.

  • Molnupiravir is an antiviral used to treat feline infectious peritonitis (FIP) in cats. This medication is used off label in veterinary medicine. Molnupiravir comes in oral capsule form.