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  • Hypokalemia is a low concentration of potassium in the blood. Potassium is vital for the normal function of muscles and nerves. The underlying cause of hypokalemia is often chronic kidney failure. Hypokalemia and its associated clinical signs may be quickly corrected by potassium supplementation.

  • Ibuprofen is commonly used in humans to treat fever, pain, and inflammation. Ibuprofen poisoning occurs when a cat ingests a toxic dose of ibuprofen, either through misuse or by accident. Ibuprofen and other NSAIDs can be extremely harmful in cats, and small doses can cause adverse effects and poisoning.

  • Icterus is also known as jaundice. It is an excessive accumulation of a yellow pigment called bilirubin in the blood and tissues, most easily seen in the gums and whites of the eyes. Icterus can be caused by hemolysis, liver disease, or obstruction of the bile duct. Your veterinarian will perform screening tests to determine the root cause of icterus.

  • Idoxuridine (brand names Dendrid®, Herplex®, Stoxil®) is an antiviral topical medication used to treat viral infections of the eye, such as feline herpesvirus-1 (FHV-1) in cats. It may also be useful for treating canine herpesvirus-1 in dogs and equine herpesvirus-2 in horses. Pregnant women should NOT handle this medication.

  • Imatinib (brand name: Gleevac®) is used to treat certain types of cancer in humans. In dogs and cats, it is used off label to treat mast cell tumors, hypereosinophilic syndrome, fibrosarcoma, and squamous cell carcinoma.

  • Imepitoin (brand name Pexion®) is a behavior modification medication used to treat noise aversion in dogs. It may also be used to treat noise phobias in dogs or as an anticonvulsant to treat idiopathic epilepsy in cats and dogs. Its use may be off label depending on condition, species, and jurisdiction. Imepitoin comes in tablet form.

  • Imidacloprid + flumethrin (Seresto collar) is a topical antiparasitic drug contained in a collar. It is used to control fleas, ticks, and chewing lice on dogs and puppies, and to control fleas and ticks in cats and kittens. If used properly, is effective for 8 months.

  • Imidacloprid + pyriproxyfen (brand names Advantage II, Provecta II) is a topical (spot-on) antiparasitic drug used to repel and kill fleas and lice in dogs and puppies. It is labeled for treatment of flea infestations in cats and kittens. Certain products may be labeled for use in ferrets or rabbits or may be used off label (extra label).

  • Imidacloprid topical is used on and off label and is applied topically to the skin to treat flea infestations in cats, dogs, and ferrets. It is frequently used in combination with other medications to treat a variety of parasites. Side effects are uncommon but may include irritation at the application site or drooling, shaking, vomiting, and decreased appetite if the medication is accidentally ingested. Do not use combination products in young pets. Certain combination products should not be used in cats.

  • Imidocarb dipropionate (brand name Imizol®) is a drug used to treat infections caused by protozoa (single-celled organisms that sometimes cause disease), such as babesiosis infection in dogs. It is also used off-label to treat other protozoal infections in dogs, cats, and horses. Imidocarb dipropionate is given by injection by a veterinarian.