Skip to main content

Educational Articles

Cats + Medications & Supplements

  • Chlorpheniramine maleate is given by mouth and is used off label to treat allergic conditions or as a mild sedative. Common side effects include sleepiness, although other side effects are possible. Do not use in pets that are allergic to it or other similar antihistamines, or pets that are undergoing allergy testing within 2 weeks. If a negative reaction occurs, please call your veterinary office.

  • Chlorpromazine is given by mouth or injection and is used off label as a sedative and to treat vomiting. Common side effects include tiredness, low blood pressure, low heart rate, or a tendency to react or startle to noises. Chlorpromazine should not be used in pets that are allergic to it or in pets with low blood pressure. If a negative reaction occurs, please call your veterinary office.

  • Choline is a vitamin supplement given by mouth and is used over the counter to treat neurological conditions such as seizures or cognitive dysfunction. Give as directed by your veterinarian. Side effects are uncommon but may include hyperactivity. Do not use in pets that are allergic to it. If a negative reaction occurs, please call your veterinary office.

  • Chromium picolinate is given by mouth and is used off label to aid in the treatment of obesity and diabetes, mostly in cats. Side effects are uncommon, but watch for increased drinking or urination, or decreased appetite. Do not give to pets that are allergic to it. If a negative reaction occurs, please call your veterinary office.

  • Cidofovir ophthalmic is a topical antiviral medication used to treat viral eye infections, such as feline herpesvirus-1, in cats. This medication must be compounded by a veterinarian or veterinary pharmacy before use in cats. Side effects may include a mild stinging sensation or redness of the eyes. Pregnant women should not handle this medication.

  • Cimetidine is given by mouth and is used off label to treat various gastrointestinal conditions related to acid production, such as ulcers and reflux. Side effects are uncommon and have not been documented in animals. Do not use in pets that are allergic to it or other histamine2 blockers. If a negative reaction occurs, please call your veterinary office.

  • Ciprofloxacin ophthalmic (brand name Ciloxan(R)) is an antibacterial agent used in the treatment of eye infections in dogs and cats. Its use in dogs and cats is off label or extra label. This medication should not be used in dogs that are allergic to quinolones. Some medications may interact with ciprofloxacin, so it is important to tell your veterinarian about any medications that your pet is taking. If a negative reaction occurs, please call your veterinary office.

  • Ciprofloxacin is a systemic fluoroquinolone antibiotic used to treat bacterial infections. It is often given by mouth, but an injectable form is also available. The most common side effect is gastrointestinal distress, but other side effects are possible. It is contraindicated in young or dehydrated pets, or in pets with liver or kidney disease. It should not be the first-choice fluoroquinolone for veterinary patients.

  • Cisapride is used off label and is given by mouth to treat gastrointestinal motility disorders in cats, dogs, and small mammals. Common side effects include vomiting, diarrhea, and abdominal discomfort. Do not use in pets that are allergic to it or in pets with conditions that would be made worse by increased intestinal movement. If a negative reaction occurs, please call your veterinary office.

  • Clarithromycin is given by mouth and is used off label to treat certain bacterial infections in several animal species. Side effects include diarrhea, vomiting, appetite changes, stomach pain/cramps, or skin redness in cats. Do not use in pets that are allergic to it or other macrolide antibiotics, in rabbits, gerbils, guinea pigs, hamsters, or horses greater than 4 months old. If a negative reaction occurs, please call your veterinary office.