Related Experiment Video
Updated: May 5, 2026

Screening Assay for Oxidative Stress in a Feline Astrocyte Cell Line, G355-5
Published on: July 13, 2011
Suspected clopidogrel-associated hepatitis in a cat
Astrid L Kamp1, Washma Yousofzai2, Hans S Kooistra1
1Department Clinical Sciences, Division Internal Medicine of Companion Animals, Utrecht University, Utrecht, The Netherlands.
Insights
Acute hepatitis is a potential adverse effect of clopidogrel in cats with cardiomyopathy. Veterinarians should monitor feline patients for liver damage during clopidogrel treatment.
Area of Science:
- Veterinary Medicine
- Pharmacology
- Hepatology
Background:
- Clopidogrel is commonly used to treat feline cardiomyopathies.
- The safety and adverse effects of clopidogrel in cats are not well-documented.
- Limited studies exist on clopidogrel's adverse effects in feline patients.
Observation:
- A 6-year-old castrated male cat with hypertrophic cardiomyopathy phenotype was treated with clopidogrel.
- The cat developed signs of acute hepatitis after 5 weeks of treatment.
- This case highlights a potential adverse reaction to clopidogrel in cats.
Findings:
- Acute hepatitis is a rare but potential adverse effect of clopidogrel in cats.
- Hepatotoxicity should be considered in feline patients experiencing clinical deterioration while on clopidogrel therapy.
- This case contributes to the limited literature on clopidogrel's safety profile in veterinary medicine.
Implications:
- Veterinarians should be aware of the potential for clopidogrel-induced hepatotoxicity in cats.
- Monitoring liver function in cats receiving clopidogrel is recommended.
- Further research is needed to fully understand the risks and benefits of clopidogrel in feline patients.
Case Summary:
Acute hepatitis and liver damage are rare adverse effects of clopidogrel in humans. In veterinary medicine, clopidogrel is mainly prescribed in the treatment of feline patients with cardiomyopathies. Little is known regarding the safety and adverse effects of clopidogrel in this group of patients. The limited number of studies scarcely report adverse effects. In this case report, a 6-year-old male castrated crossbred cat with the hypertrophic cardiomyopathy phenotype had signs of acute hepatitis after 5 weeks of clopidogrel treatment.
Relevance And Novel Information:
Evaluation of the case and review of the literature indicate that acute hepatitis might be a potential adverse effect of clopidogrel in feline patients. Therefore, hepatotoxicity should be taken into consideration when a feline patient shows clinical deterioration after the use of clopidogrel.

