Seizures after Praziquantel in cats

The FDA has received 24 reports of seizures in cats after Praziquantel. That is 1.4% of all reports for this medicine, compared with 2.6% across reports for all cat medicines, so it is reported less often than average with this medicine.

24Reports

83%Marked serious

25%Recovered

29%Died or euthanised

Same dayTypical onset

How soon it started

Same day

11 55%

1–2 days

5 25%

3–7 days

0 0.0%

1–4 weeks

2 10%

Over a month

2 10%

How the animals did

Recovered

6 25%

Still unwell when reported

4 17%

Died

7 29%

Not known

7 29%

Problems reported at the same time

7 29%

6 25%

6 25%

5 21%

5 21%

5 21%

4 17%

4 17%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Praziquantel treats tapeworms.

Questions owners ask

Can Praziquantel 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 + Pyrantel 25 reports · 2.0% of its reports
Seizures after Pyrantel 24 reports · 4.3% of its reports

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