Fever after Pyrantel in dogs

108 reports to the FDA describe fever in dogs given Pyrantel. That is 2.3% of all reports for this medicine, compared with 1.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

108Reports

36%Marked serious

14%Recovered

19%Died or euthanised

1 daysTypical onset

How soon it started

Same day

27 47%

1–2 days

10 18%

3–7 days

11 19%

1–4 weeks

3 5.3%

Over a month

6 11%

How the animals did

Recovered

13 12%

Recovered with lasting effects

2 1.9%

Still unwell when reported

32 30%

Died

15 14%

Euthanised

6 5.6%

Not known

40 37%

Problems reported at the same time

49 45%

37 34%

32 30%

21 19%

20 19%

20 19%

19 18%

16 15%

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 fever in dogs?: 108 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.
How soon after a dose was it reported?: In half of the reports with dates, it started within 1 day of the first dose.
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).

Fever with similar medicines

Fever after Pyrantel + Sarolaner (Simparica Trio) 318 reports · 0.6% of its reports
Fever after Febantel + Praziquantel + Pyrantel (Drontal Plus) 48 reports · 0.7% of its reports
Fever after Fenbendazole 144 reports · 2.4% of its reports
Fever after Praziquantel + Pyrantel 29 reports · 0.8% of its reports

All reported side effects of Pyrantel in dogs · Medicines most reported with fever