Animal & veterinary · openFDA

Animal drug adverse event reports

Reports of adverse events in animals given veterinary drugs, by species, drug and reaction. 1,378,854 records; openFDA updated it 2026-11-09. About this dataset

Newest records

Most reported reactions
  • Vomiting215,756
  • Diarrhoea83,314
  • Lethargy (see also Central nervous system depression in 'Neurological')76,433
  • Emesis69,533
  • INEFFECTIVE, HEARTWORM LARVAE69,277
  • Lack of efficacy (ectoparasite) - flea65,571
  • Anorexia59,808
  • Lack of efficacy - NOS57,453
  • MSK

    Reactions: UNPALATABLE, Product defect, product difficult to use/handle (see also 'Drug device difficult to use/handle')

    Other
  • MSK

    Dog · Reactions: Aggression, Growling, Hallucination +6

    Veterinarian
  • MSK

    Dog · Reactions: Lack of efficacy (endoparasite) - roundworm NOS

    Other
  • MSK

    Cat · Reactions: Diarrhoea, Emesis (multiple)

    Animal Owner
  • MSK

    Dog · Reactions: Vomiting

    Other
  • MSK

    Dog · Reactions: Lack of efficacy (endoparasite) - hookworm

    Other Health Care ProfessionalSerious
  • MSK

    Cat · Reactions: Lack of efficacy - NOS

    Veterinarian
  • MSK

    Dog · Reactions: Emesis (multiple)

    Animal Owner
  • MSK

    Dog · Reactions: Medication error NOS, Lack of efficacy (bacteria) - Anaplasma

    Other Health Care Professional
  • MSK

    Dog · Reactions: Loss of hearing

    VeterinarianSerious
  • MSK

    Dog · Reactions: Lack of efficacy (bacteria) - Ehrlichia, Medication error NOS

    Animal OwnerSerious
  • MSK

    Dog · Reactions: Lack of efficacy - NOS, Medication error NOS

    Animal Owner
  • MSK

    Dog · Reactions: Lack of efficacy (endoparasite) - heartworm, Medication error NOS

    Other Health Care ProfessionalSerious
  • MSK

    Dog · Reactions: Diarrhoea, Lethargy (see also Central nervous system depression in Neurological), Anorexia +4

    Animal OwnerSerious
  • MSK

    Dog · Reactions: Lack of efficacy (endoparasite) - heartworm

    Other Health Care ProfessionalSerious
  • MSK

    Dog · Reactions: Walking slowly, General pain (see other SOCs for specific pain)

    Other Health Care ProfessionalSerious
  • MSK

    Reactions: Out of specification

    Other Health Care Professional
  • MSK

    Dog · Reactions: Monocytosis, Thrombocytosis, Neutrophilia +6

    Other
  • MSK

    Dog · Reactions: Neurological signs NOS

    Other Health Care Professional
  • MSK

    Dog · Reactions: Urinary tract infection

    Veterinarian
Wholesale access for licensed clinicians.

Free to join: your NPI is checked against the federal registry at signup, then wholesale pricing and the professional shelves open.

Join as a DoctorSell on MedGrid

How to read this: Each report says someone told FDA an event happened while a product was used. A report does not show the product caused it, and counts rise and fall with how many people report. Data from openFDA, FDA's public API. FDA says not to rely on it to make decisions about medical care and to treat every result as unvalidated; confirm against FDA's own record and the product labeling. Not medical or legal advice.