Breathing problems after Pyrantel in dogs

The FDA has received 221 reports of breathing problems in dogs after Pyrantel. That is 4.6% of all reports for this medicine, compared with 2.7% across reports for all dog medicines, so it is reported unusually often with this medicine.

221Reports

50%Marked serious

21%Recovered

29%Died or euthanised

Same dayTypical onset

How soon it started

Same day

77 58%

1–2 days

21 16%

3–7 days

15 11%

1–4 weeks

10 7.6%

Over a month

9 6.8%

How the animals did

Recovered

45 20%

Recovered with lasting effects

1 0.5%

Still unwell when reported

49 22%

Died

50 23%

Euthanised

14 6.3%

Not known

62 28%

Problems reported at the same time

76 34%

68 31%

63 29%

49 22%

48 22%

36 16%

34 15%

25 11%

Age of the animals

Under 1 year

107

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 breathing problems in dogs?: 221 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).

Breathing problems with similar medicines

Breathing problems after Pyrantel + Sarolaner (Simparica Trio) 762 reports · 1.4% of its reports
Breathing problems after Febantel + Praziquantel + Pyrantel (Drontal Plus) 126 reports · 1.9% of its reports
Breathing problems after Fenbendazole 142 reports · 2.4% of its reports
Breathing problems after Praziquantel + Pyrantel 175 reports · 4.7% of its reports
Breathing problems after Praziquantel 21 reports · 1.9% of its reports

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