Library

Cats + Medications

  • Cyanocobalamin (vitamin B12 or cobalamin) is a vitamin supplement used to treat systemic deficiencies. It can be given through a subcutaneous injection or oral tablet. The injection may sting temporarily, but otherwise is very safe. If a negative reaction occurs, call your veterinary office.

  • Cyclophosphamide is given by mouth or injection and is used off label to treat various cancers such as lymphoma, leukemia, carcinoma, and sarcoma. Common side effects include hair loss and hair coat changes. Do not use in pets that are allergic to it or that cannot be sufficiently monitored during treatment, are pregnant or lactating, have urinary obstruction, infection, bone marrow dysfunction, or have had an episode of blood in the urine that is not associated with a bladder infection. If a negative reaction occurs, please call your veterinary office.

  • Cyclosporine ophthalmic ointment is an immunosuppressant used in the treatment of eye diseases suspected to be immune-related, including keratoconjunctivitis sicca (KCS) in dogs, and other inflammatory conditions of the eye. Cyclosporine comes as an ophthalmic ointment but may sometimes be compounded into a higher concentration ophthalmic solution for pets not responding to the ointment. It is important to remember that it may take days to weeks to notice improvement. Do not stop giving the medication without asking your veterinarian. If signs of serious side effects or immune suppression occur, contact your veterinarian immediately. An overdose of eye medication is unlikely, but side effects or toxic effects could occur if your pet eats the medication. If you suspect an overdose or an adverse reaction to the medication, call your veterinary office immediately.

  • Cyclosporine is a medication that targets the immune system and is used to treat atopic (allergic) dermatitis in dogs and cats. Cyclosporine is given by mouth, in the form of a capsule for dogs and a liquid suspension for cats. The most common side effects of cyclosporine are gastrointestinal side effects, such as vomiting, diarrhea, and decreased appetite (anorexia). Cyclosporine should be used with caution in dogs and cats with kidney disease and/or diabetes. If you suspect an overdose or negative reaction to the medication, call your veterinary office immediately.

  • Cyproheptadine is given by mouth and is used off label to treat allergic skin conditions, certain toxicities, and to stimulate appetite. Give as directed by your veterinarian. Common side effects include sleepiness, increased appetite, and dry mouth. Do not use in pets that are allergic to it or pets undergoing skin allergy testing within the next two weeks. If a negative reaction occurs, please call your veterinary office.

  • Cytarabine is a chemotherapy medication commonly used off label to treat blood cancers and brain inflammation. It is an injectable solution usually given in the vein by a veterinary professional. Common side effects include gastrointestinal upset and low blood cell counts. This medication should not be used or used with caution in pets with liver or kidney disease, or those that have an allergy to this medication, or pregnant /lactating pets. If a negative reaction occurs, call your veterinary office.

  • Desmopressin is administered into the eye or is given as an injection and is used off label to treat diabetes insipidus and von Willebrand disease. Give as directed by your veterinarian. Side effects are uncommon but may include irritation upon application to the eye. Do not use in pets that are allergic to it or pets that are prone to blood clots, such as those with heart disease. If a negative reaction occurs, please call your veterinary office.

  • Dexamethasone is given on and off label, by mouth or injection, to treat various inflammatory, autoimmune, and adrenal gland conditions. It can also be used off label as a diagnostic test. Common side effects include increased drinking, urination and/or appetite, dull/dry haircoat, weight gain, pot-bellied appearance, muscle weakness, panting, vomiting, or diarrhea. Do not use in pets that are allergic to it, have systemic fungal infections, diabetes, or stomach or intestinal ulcers, or are taking NSAIDs. It should not be used in rabbits or in surgical pets. If a negative reaction occurs, please call your veterinary office.

  • Dextromethorphan is given by mouth and is used off label to treat compulsive behaviors and occasionally used to treat cough. Side effects are uncommon but may include vomiting, diarrhea, decreased appetite, sleepiness, drooling or anxiousness. Do not use in pets that are allergic to it. If a negative reaction occurs, please call your veterinary office.

  • Diazepam is given by mouth, injection, or into the rectum and is used off label to treat anxiety, seizures, tense muscles, or decreased appetite. Give as directed by your veterinarian. Side effects include sleepiness, increased appetite, incoordination, weakness, agitation, drooling, and aggression. Do not give to cats by mouth, and do not use in pets that are allergic to it or other benzodiazepines, or in pets with severe liver disease. If a negative reaction occurs, please call your veterinary office.