Tachycardia after Pyrantel in dogs

38 reports to the FDA describe tachycardia in dogs given Pyrantel. That is 0.8% of all reports for this medicine, compared with 0.5% across reports for all dog medicines, so it is reported unusually often with this medicine.

38Reports

55%Marked serious

45%Recovered

24%Died or euthanised

Same dayTypical onset

How soon it started

Same day

21 70%

1–2 days

0 0.0%

3–7 days

1 3.3%

1–4 weeks

7 23%

Over a month

1 3.3%

How the animals did

Recovered

16 42%

Recovered with lasting effects

1 2.6%

Still unwell when reported

6 16%

Died

7 18%

Euthanised

2 5.3%

Not known

6 16%

Problems reported at the same time

20 53%

18 47%

14 37%

10 26%

10 26%

8 21%

8 21%

7 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 tachycardia in dogs?: 38 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 the same 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).

Tachycardia with similar medicines

Tachycardia after Pyrantel + Sarolaner (Simparica Trio) 93 reports · 0.2% of its reports
Tachycardia after Febantel + Praziquantel + Pyrantel (Drontal Plus) 23 reports · 0.3% of its reports
Tachycardia after Fenbendazole 31 reports · 0.5% of its reports

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