Seizures after Pyrantel in cats

24 reports to the FDA describe seizures in cats given Pyrantel. That is 4.3% of all reports for this medicine, compared with 2.6% across reports for all cat medicines, so it is reported unusually often with this medicine.

24Reports

71%Marked serious

17%Recovered

50%Died or euthanised

Same dayTypical onset

How soon it started

Same day

10 63%

1–2 days

6 38%

3–7 days

0 0.0%

1–4 weeks

0 0.0%

Over a month

0 0.0%

How the animals did

Recovered

4 17%

Still unwell when reported

3 13%

Died

8 33%

Euthanised

4 17%

Not known

5 21%

Problems reported at the same time

12 50%

6 25%

5 21%

5 21%

4 17%

Weakness

3 13%

Loss of appetite

3 13%

Tremors

2 8.3%

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 seizures in cats?: 24 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).

Seizures with similar medicines

Seizures after Emodepside + Praziquantel (Profender) 100 reports · 1.7% of its reports
Seizures after Praziquantel 24 reports · 1.4% of its reports
Seizures after Praziquantel + Pyrantel 25 reports · 2.0% of its reports

All reported side effects of Pyrantel in cats · Medicines most reported with seizures