Loss of appetite after Fenbendazole in horses

The FDA has received 21 reports of loss of appetite in horses after Fenbendazole. That is 12% of all reports for this medicine, compared with 9.2% across reports for all horse medicines.

21Reports

38%Marked serious

24%Recovered

24%Died or euthanised

–Typical onset

How the animals did

Recovered

4 19%

Recovered with lasting effects

1 4.8%

Still unwell when reported

2 9.5%

Died

4 19%

Euthanised

1 4.8%

Not known

9 43%

Problems reported at the same time

Death

5 24%

Diarrhea

4 19%

Lethargy

4 19%

Recumbency

3 14%

Decreased drinking

3 14%

Pain

2 9.5%

Fever

2 9.5%

Abnormal posture

2 9.5%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Fenbendazole treats intestinal worms and some other parasites.

Questions owners ask

Can Fenbendazole cause loss of appetite in horses?: 21 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).

Loss of appetite with similar medicines

Loss of appetite after Pyrantel 53 reports · 5.7% of its reports

All reported side effects of Fenbendazole in horses · Medicines most reported with loss of appetite