Death after Pyrantel in horses

The FDA has received 69 reports of death in horses after Pyrantel. That is 7.4% of all reports for this medicine, compared with 11% across reports for all horse medicines, so it is reported less often than average with this medicine.

69Reports

23%Marked serious

0.0%Recovered

97%Died or euthanised

–Typical onset

How the animals did

Died

63 91%

Euthanised

4 5.8%

Not known

2 2.9%

Problems reported at the same time

Abdominal pain

24 35%

Didn't work as expected

13 19%

Loss of appetite

9 13%

Digestive tract disorder

7 10%

Lethargy

6 8.7%

Accidental exposure

5 7.2%

Diarrhea

5 7.2%

Liver problems

5 7.2%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Pyrantel treats roundworms and hookworms.

Questions owners ask

Can Pyrantel cause death in horses?: 69 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
What should I do?: Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Death with similar medicines

Death after Fenbendazole 25 reports · 15% of its reports

All reported side effects of Pyrantel in horses · Medicines most reported with death