Death after Praziquantel in cats

The FDA has received 101 reports of death in cats after Praziquantel. That is 6.1% of all reports for this medicine, compared with 8.9% across reports for all cat medicines.

101Reports

77%Marked serious

0.0%Recovered

99%Died or euthanised

1 daysTypical onset

How soon it started

Same day

25 37%

1–2 days

19 28%

3–7 days

10 15%

1–4 weeks

10 15%

Over a month

4 5.9%

How the animals did

Died

82 81%

Euthanised

18 18%

Not known

1 1.0%

Problems reported at the same time

26 26%

26 26%

16 16%

14 14%

12 12%

9 8.9%

9 8.9%

7 6.9%

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 death in cats?: 101 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).

Death with similar medicines

Death after Emodepside + Praziquantel (Profender) 270 reports · 4.7% of its reports
Death after Praziquantel + Pyrantel 81 reports · 6.4% of its reports
Death after Pyrantel 110 reports · 20% of its reports
Death after Fenbendazole 60 reports · 21% of its reports

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