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Educational Articles

Cats + Medications & Supplements

  • Sulfadimethoxine is an antimicrobial given by mouth in the form of a tablet or liquid suspension, used primarily to treat coccidiosis. Its use for treating small mammals and reptiles is off label. Common side effects include vomiting, diarrhea, and decreased appetite. This medication should not be used in pets that are allergic to it, pregnant, lactating, or have severe liver or kidney dysfunction. If a negative reaction occurs, call your veterinary office.

  • Sulfamethoxazole/trimethoprim is given by mouth in the form of a liquid suspension or is given by injection in the hospital, and it is commonly used to treat bacterial and parasitic infections, sometimes off label, in dogs, cats, small mammals, and other exotics. Common side effects include a decreased appetite, vomiting, and diarrhea, although more serious side effects are possible such as dry eye, or liver, blood, or urinary problems. Do not use in pets that have severe liver damage, blood cell problems, dehydration, or sulfa allergies. If a negative reaction occurs, please call your veterinary office.

  • Sulfasalazine is given by mouth and is used off label to treat inflammatory large bowel disease and vasculitis. Give as directed by your veterinarian. Side effects include dry eye, decreased appetite, vomiting, yellowing of the skin, eyes, or body fluids. Do not use in pets that are allergic to it or other sulfonamides or salicylates, or in Doberman Pinschers, Miniature Schnauzers, or Samoyeds, or in pets with dry eye/KCS, intestinal or urinary blockages, or severe dehydration. If a negative reaction occurs, please call your veterinary office.

  • Tacrolimus ophthalmic is applied to the eye and is used off label to treat KCS (dry eye) and other immune-mediated and inflammatory conditions of the eye. Give as directed. Side effects are not common but may include irritation, eyelid twitches, or hair loss around the eye. Do not use in pets that are allergic to it or have a viral or fungal infection in the eye. If a negative reaction occurs, please call your veterinary office.

  • Taurine is given by mouth in the form of a capsule, tablet, powder, or liquid and is used as an over the counter nutritional supplement to treat taurine deficiency, dilated cardiomyopathy, and prevent retinal degeneration. Give as directed by your veterinarian. Side effects are rare but may include vomiting. There are no known contraindications to using this supplement. If a negative reaction occurs, please call your veterinary office.

  • Terbinafine oral tablets or granules are commonly used off label to treat skin or systemic fungal infections in dogs and cats. Common side effects are primarily gastrointestinal such as vomiting, inappetence, and diarrhea, and should be used with caution in patients with liver or kidney disease. If treating with this medication long-term, your veterinarian will perform periodic blood tests to check liver function and monitor for any changes or elevations. If you suspect an overdose or an adverse reaction to the medication, call your veterinary office immediately.

  • Terbinafine cream or spray is occasionally used off label to treat skin fungal infections in dogs, or in a veterinary combination product to treat ear infections. When given as directed, side effects are rarely noted, but could include skin irritation. It is ineffective for treating fungal skin infections in cats. Your veterinarian may monitor your pet to be sure that the medication is working. If you suspect an overdose or an adverse reaction to the medication, call your veterinary office immediately.

  • Tetracycline is given by mouth and is used off label to treat bacterial infections and inflammatory skin conditions in many animal species. The most common side effects include nausea, vomiting, diarrhea, and lack of appetite. Do not use in pets that are allergic to it or other tetracycline antibiotics, or in pregnant animals, especially in the first half of pregnancy. If a negative reaction occurs, please call your veterinary office.

  • Theophylline is used off label to treat cough caused by bronchoconstriction. It is given by mouth in the form of a tablet or liquid, or in hospital as an injection. The most common side effects include stomach upset and excitement. It should be used with caution in pets with abnormal heart rhythms, seizures, stomach ulcers, hyperthyroidism, kidney, liver, or heart disease, severely high blood pressure, severely low blood oxygen levels, or in young, old, or pregnant or lactating pets. If a negative reaction occurs, please call your veterinary office.

  • Tobramycin ophthalmic is an antimicrobial medication used to treat eye infections in cats, dogs, and exotic companion animals. Tobramycin ophthalmic comes in ointment and liquid drop suspension form. Caution when using this medication in pets with kidney disease and/or glaucoma. Do not confuse this medication with combination products containing tobramycin and a steroid.