Blood problems after Pyrantel in dogs

119 reports to the FDA describe blood problems in dogs given Pyrantel. That is 2.5% of all reports for this medicine, compared with 1.8% across reports for all dog medicines.

119Reports

66%Marked serious

9.2%Recovered

43%Died or euthanised

7 daysTypical onset

How soon it started

Same day

22 28%

1–2 days

9 11%

3–7 days

12 15%

1–4 weeks

18 23%

Over a month

19 24%

How the animals did

Recovered

11 9.2%

Still unwell when reported

36 30%

Died

27 23%

Euthanised

24 20%

Not known

21 18%

Problems reported at the same time

63 53%

51 43%

37 31%

36 30%

31 26%

26 22%

26 22%

22 18%

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 blood problems in dogs?: 119 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 7 days 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).

Blood problems with similar medicines

Blood problems after Pyrantel + Sarolaner (Simparica Trio) 335 reports · 0.6% of its reports
Blood problems after Febantel + Praziquantel + Pyrantel (Drontal Plus) 51 reports · 0.8% of its reports
Blood problems after Fenbendazole 123 reports · 2.1% of its reports
Blood problems after Praziquantel + Pyrantel 24 reports · 0.7% of its reports

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