Browse Pet Safety Reports

15 FDA adverse event reports for pets.

FDA Veterinary Adverse Event Database

Browse 15 adverse event reports collected by the FDA's Center for Veterinary Medicine. Each report includes the animal species, breed, drug or product involved, observed reactions, and outcome. Reports flagged as "serious" involve death, life-threatening conditions, or hospitalization. Use the filters to narrow results by species, outcome severity, or keyword. Note that a higher number of reports does not necessarily indicate a less safe product — widely prescribed drugs naturally accumulate more reports.

Pet Adverse Event Reports

Browse 15 FDA veterinary adverse event reports for Wolf.

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Date Species Breed Drug Reaction Outcome
Apr 30, 2020 Wolf Unknown MSK Lack of efficacy (endoparasite) - heartworm Outcome Unknown
Apr 12, 2020 Wolf Unknown MSK Lack of efficacy (endoparasite) - heartworm Outcome Unknown
Nov 22, 2018 Wolf Unknown MSK Emesis (multiple) Recovered/Normal
Oct 3, 2017 Wolf Unknown MSK Vomiting Recovered/Normal
Jul 17, 2015 Wolf Unknown MSK Pruritus; Lack of efficacy (ectoparasite) - flea Outcome Unknown
Jul 6, 2015 Wolf Unknown MSK Pruritus; Reddening of the skin Recovered/Normal
May 3, 2015 Wolf Unknown MSK Application site reddening; Reddening of the skin; Pruritus; Dermatosis NOS Recovered/Normal
Apr 3, 2015 Wolf Unknown MSK Application site reddening; Reddening of the skin; Pruritus Recovered/Normal
Jan 26, 2015 Wolf Unknown MSK Anxiety; Increased appetite Recovered/Normal
Feb 5, 2012 Wolf Unknown MSK Emesis Recovered/Normal
Feb 5, 2012 Wolf Unknown MSK Emesis; UNPALATABLE Recovered/Normal
Wolf Unknown MSK Hyperkalaemia; Acidosis; Hyperglycaemia; Leucocytosis NOS; Thrombocytosis; Hy... Recovered/Normal
Wolf Unknown MSK Hypotension; Anaemia NOS; Diarrhoea; Anorexia; Intentional misuse Recovered/Normal
Wolf Unknown MSK INEFFECTIVE, HEARTWORM LARVAE Recovered with Sequela
Wolf Unknown MSK Lack of efficacy (endoparasite) - hookworm; INEFFECTIVE, ASCARIDS NOS Outcome Unknown

Frequently Asked Questions

Contact your veterinarian immediately. If the reaction is severe — difficulty breathing, seizures, collapse, or severe swelling — seek emergency veterinary care right away. After your pet is stabilized, report the adverse event to the FDA through safetyreporting.hhs.gov or by calling 1-888-FDA-VETS (1-888-332-8387). Reporting helps the FDA identify safety issues that can lead to label changes or product recalls.

Dogs account for the majority of adverse event reports, followed by cats. This reflects both the larger pet population and wider range of medications for these species. Flea and tick products, pain medications (NSAIDs), and heartworm preventives are among the product categories with the highest report counts across all species.

Not necessarily. A drug used by millions of pets will have more reports in absolute numbers than a niche product, even if the actual rate of adverse events is lower. The FDA uses these reports as one of many tools to evaluate drug safety, looking for patterns and statistical signals rather than raw counts alone. Always consult your veterinarian before changing any medication.