Hypoglycaemia after Pyrantel in dogs

25 reports to the FDA describe hypoglycaemia in dogs given Pyrantel. That is 0.5% of all reports for this medicine, compared with 0.4% across reports for all dog medicines.

25Reports

48%Marked serious

4.0%Recovered

48%Died or euthanised

1 daysTypical onset

How soon it started

Same day

4 31%

1–2 days

6 46%

3–7 days

2 15%

1–4 weeks

1 7.7%

Over a month

0 0.0%

How the animals did

Recovered

1 4.0%

Still unwell when reported

4 16%

Died

11 44%

Euthanised

1 4.0%

Not known

8 32%

Problems reported at the same time

14 56%

12 48%

11 44%

11 44%

10 40%

5 20%

5 20%

5 20%

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 hypoglycaemia in dogs?: 25 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).

Hypoglycaemia with similar medicines

Hypoglycaemia after Pyrantel + Sarolaner (Simparica Trio) 45 reports · 0.1% of its reports
Hypoglycaemia after Fenbendazole 49 reports · 0.8% of its reports

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