This is one of the more common forms of toxicity, and is among the ten most common poisoning cases reported to the National Animal Poison Control Center. Classified as carboxylic acids (e.g., aspirin, ibuprofen) or enolic acids (e.g., phenylbutazone, dipyrone), Nonsteroidal anti-inflammatory drug toxicity (or NSAIDs) can be extremely toxic when ingested over the long-term (chronic) or when acutely ingested.
Species differ greatly in how their bodies absorb, excrete and metabolize NSAID agents, but both dogs and cats are susceptible to NSAID toxicity. In fact, if left untreated, it can damage the gastrointestinal system and kidneys.
Symptoms and Types
Symptoms of NSAID toxicity include:
- Abdominal pain
- Sluggish behavior
- Loss of appetite (anorexia)
- Vomiting (sometimes with blood)
- Loss of bladder control (polyuria and polydipsia)
- Pale mucous membranes
- Abnormally rapid heart beat
Seizures and coma may also occur if larger amounts are ingested; NSAID toxicity may even result in collapse and sudden death due to a perforated stomach ulcer.
This form of toxicity is typically due to accidental exposure to or inappropriate administration of NSAIDs. However, cats predisposed to kidney disease (such as those affected by old age or with a history of ulcers in the gastrointestinal system) are at higher risk for developing NSAID toxicity.
One of the most common diagnostic procedures used to confirm NSAID toxicity is an endoscopy, in which a small tube is inserted into the mouth and down into the stomach for visual inspection—in this case to verify for gastrointestinal ulcers. A urine analysis is also useful in eliminating other possible causes for your cat’s symptoms.
Treatment for NSAID toxicity generally requires immediate hospitalization, especially for cats that have ingested large doses of NSAIDs and are exhibiting serious clinical signs such as frequent vomiting and anemia. Once hospitalized, your veterinarian will provide cat medications and fluid therapy, as well as blood transfusions if your cat is severely anemic. (Note: if NSAID toxicity has led to a perforated stomach ulcer, surgery may be necessary.) If your cat has mild symptoms, on the other hand, your veterinarian will adjust its cat food (a bland, low-protein diet is recommended) and provide proper at-home medication.
Living and Management
After initial treatment is completed, various symptoms should be monitored. Stool and vomit should be checked for blood, which would indicate gastrointestinal bleeding that may not develop for several days. All medications should be administered regularly for the full time prescribed, and a bland low-protein diet adhered to.
NSAID toxicity is avoidable. Store medication in a secure location out of your cat’s reach and only medicate the animal under the supervision of a veterinarian. It is also important that high-risk patients (such as older animals or those with a history of gastrointestinal bleeding) be tested before beginning any sort of NSAID therapy.
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