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Cats + Medications

  • Calcium acetate is given off label and by mouth to treat elevated blood phosphorus levels, especially due to kidney disease. Side effects may include nausea or stomach upset. This medication should not be used in pets that are allergic to it or have high blood calcium levels. If a negative reaction occurs, please call your veterinary office.

  • Capromorelin is an appetite stimulant liquid solution given by mouth, and is used to treat inappetence. Side effects include vomiting, diarrhea, increased drinking and urination, and intestinal sounds. This medication should not be used in pets allergic to it, and be used with caution in those with liver and kidney disease. If a negative reaction occurs, call your veterinary office.

  • Captopril is given by mouth and is used off label to treat congestive heart failure and high blood pressure. Give as directed by your veterinarian. The most common side effects include vomiting, diarrhea, or lack of appetite. Do not use in pets that are allergic to it or other ACE inhibitors. If a negative reaction occurs, please call your veterinary office.

  • Carbamazepine is given my mouth and is used off label in dogs, cats, and horses to treat seizures, pain, and behavior disorders. Common side effects in animals are unknown, but may include dizziness, sleepiness, nausea, and vomiting. Do not use in pets that have recently used amitraz, are pregnant, or have bone marrow disease. If a negative reaction occurs, please call your veterinary office.

  • Carnitine is an amino acid nutrient given by mouth and is used to treat dilated cardiomyopathy and other heart diseases in dogs, or to treat hepatic lipidosis (liver disease) in cats. Give as directed by your veterinarian. Side effects are uncommon but may include mild diarrhea or vomiting. Do not use the D form of carnitine, use the L (Levo-) form only. If a negative reaction occurs, please call your veterinary office.

  • Carprofen is used on and off label and is given by mouth in the form of a tablet to treat pain and inflammation. The most common side effects include vomiting, diarrhea, and decreased appetite. Do not use this medication in pets with bleeding disorders, in pets that are allergic to it or other NSAIDs in the same class, or in pets concurrently using corticosteroids or other NSAIDs. If a negative reaction occurs, please call your veterinary office.

  • Cefpodoxime (brand names Simplicef ® and Vantin ®) is an oral antibiotic used to treat certain skin infections in dogs. It may be used off label to treat skin infections in cats and urinary tract infections in dogs. There are very few side effects of cefpodoxime, however it may cause complete loss of appetite in cats which can lead to serious complications. Some medications may interact with cefpodoxime, so it is important to tell your veterinarian about any medications that your pet is taking.

  • Cephalexin (brand names Rilexine®, Keflex®, Vetolexin®) is an oral antibiotic that is used to treat pyoderma and other bacterial skin infections in dogs and is used off label or extra-label in cats to treat pyoderma and some other types of skin infections. It is sometimes used off label or extra-label to treat urinary tract infections in cats and dogs. Side effects to cephalexin are usually mild and rarely occur. It may cause gastrointestinal upset including lack of appetite, vomiting, and diarrhea. Do not use cephalexin in pets that have a known hypersensitivity or allergy to cephalosporins.

  • Cetirizine (brand name Zyrtec®, Reactine®) is an antihistamine used to treat pruritus (itching) associated with atopic dermatitis, urticaria (hives), and insect-bite reactions in cats and dogs. Its use is in cats and dogs is ‘off label’ or ‘extra label’. Cetirizine does not typically cause any side effects. Vomiting and increased salivation has been observed in some dogs. Certain drugs are known to interact with cetirizine including central nervous system depressants (e.g., diazepam, alprazolam) and digoxin.

  • Chlorambucil is given by mouth and is used off label to treat certain types of cancer and autoimmune diseases. Common side effects include fur loss and changes in hair coat, as well as gastrointestinal upset. Do not use in pets that are allergic to it or other alkylating medications, that have bone marrow disease, have an active infection, or that are pregnant or lactating. If a negative reaction occurs, please call your veterinary office.