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  • Cuterebra is the scientific name for the North American rabbit or rodent botfly. Cats are accidental hosts of Cuterebra larvae, and they are rarely evident from external skin inspection. A hole enlarges when the warble has matured, often leading to an infected empty cyst. Treatment depends on when the condition is discovered, and in many cases, antibiotics are used to treat secondary infections.

  • 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.

  • Cyanosis is a bluish discoloration of the skin and mucous membranes of the body caused by inadequate oxygen levels. Cyanosis is an emergency, and the root cause may be life-threatening and may or may not be reversible. Once back home, homecare instructions must be followed carefully.

  • Cyclosporin is an immunosuppressive agent. It is used to treat diseases and disorders caused by an overactive immune system. An ointment for the eye is also available for treating dry eye syndrome (keratoconjunctivitis sicca). Cyclosporin may be used to help heal cracks around the anus (perianal fistulas).

  • Cyclosporine is given by mouth and is used to treat atopic dermatitis in dogs and cats. It has also been used off-label to treat other types of immune-mediated conditions. Give as directed. The most common side effects include stomach upset, such as vomiting, diarrhea, and decreased appetite. Do not use in pets with severe infections, a history of cancer, allergies to the medication, that are nursing or pregnant, or in pets younger than six months old. If a negative reaction occurs, contact your veterinarian.

  • Cyproheptadine is an antihistamine that may be used to prevent or control an allergic reaction. This medication may also be used to stimulate a cat’s appetite. Cyproheptadine is useful to relieve allergic symptoms; however, it will not cure the underlying disease. Your veterinarian may prescribe cyproheptadine for other symptoms or problems.

  • In cats, diseases of the lower urinary tract (bladder and urethra) are often grouped under the term feline lower urinary tract disease (FLUTD). Typical signs in cats with FLUTD are those of inflammation and irritation of the lower urinary tract. There are many potential causes of FLUTD, and diagnosis is based on assessing clinical signs and laboratory testing. There is no universal treatment for FLUTD. Each case has to be investigated to determine the underlying cause, and then the treatment has to be tailored to the individual cat.

  • 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, those that have an allergy to this medication, and pregnant/lactating pets. If a negative reaction occurs, call your veterinary office.

  • Cytauxzoonosis is an often-fatal disease caused by a tick-borne protozoan parasite, typically found in bobcats. It is more commonly seen in the southern United States but is spreading with tick migration. It can cause anorexia, lethargy, respiratory difficulty, anemia, and jaundice. Diagnostic testing, treatment options, and preventives are described in this handout. This disease is not transmissible to dogs or humans.

  • Cytology is a useful tool to often diagnose abnormal lumps on your pet's body as well as evaluation of fluid samples and tissue surfaces. It is relatively simple and inexpensive but can provide a lot of information. Depending on results, further tests may be indicated to best help your pet.