Animal drug adverse event reports

MSK

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

Animal OwnerSerious
Treated for ae
true
Unique aer ID number
USA-USFDACVM-2026-US-035709
Time between exposure and onset
>12 Months
Original receive date
20260625
Number of animals affected
1
Primary reporter
Animal Owner
Number of animals treated
1
Secondary reporter
Veterinarian
Onset date
20260420
Foreign or domestic
Domestic
Report ID
A200338
Type of information
Lack Of Expected Effectiveness
Serious ae
true
Reaction
  1. Veddra version
    21
    Veddra term code
    2430
    Veddra term name
    Lack of efficacy (endoparasite) - heartworm
    Number of animals affected
    1
    Accuracy
    Actual
Receiver
Organization
Food and Drug Administration Center for Veterinary Medicine
Street address
7500 Standish Place (HFV-210) Room N403
City
Rockville
State
MD
Postal code
20855
Country
USA
Drug
  1. First exposure date
    20240530
    Last exposure date
    20240530
    Route
    Oral
    Lot number
    UNKNOWN
    Brand name
    MSK
    Dosage form
    Tablet
    Atc vet code
    QP54AA51
    Frequency of administration
    Value
    1
    Unit
    Month
    Dose
    Numerator
    1
    Numerator unit
    tablet
    Denominator
    1
    Denominator unit
    Animal
    Manufacturer
    Name
    MSK
    Registration number
    USA-USFDACVM-A200338
    Active ingredients
    1. Name
      Ivermectin
      Dose
      Numerator
      136
      Numerator unit
      Microgram
      Denominator
      1
      Denominator unit
      tablet
    2. Name
      Pyrantel
      Dose
      Numerator
      114
      Numerator unit
      Milligram
      Denominator
      1
      Denominator unit
      tablet
Health assessment prior to exposure
Condition
Unknown
Assessed by
Veterinarian
Animal
Species
Dog
Gender
Male
Reproductive status
Neutered
Female animal physiological status
NOT APPLICABLE
Age
Min
1.00
Unit
Year
Qualifier
Measured
Weight
Qualifier
Unknown
Breed
Is crossbred
true
Breed component
Retriever - Labrador
Outcome
  1. Medical status
    Outcome Unknown
    Number of animals affected
    1
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.