Diarrhea after Praziquantel in cats

135 reports to the FDA describe diarrhea in cats given Praziquantel. That is 8.1% of all reports for this medicine, compared with 5.1% across reports for all cat medicines, so it is reported unusually often with this medicine.

135Reports

24%Marked serious

9.6%Recovered

5.2%Died or euthanised

1 daysTypical onset

How soon it started

Same day

40 35%

1–2 days

38 33%

3–7 days

15 13%

1–4 weeks

16 14%

Over a month

5 4.4%

How the animals did

Recovered

13 9.6%

Still unwell when reported

35 26%

Died

7 5.2%

Not known

80 59%

Problems reported at the same time

46 34%

23 17%

23 17%

16 12%

9 6.7%

8 5.9%

7 5.2%

6 4.4%

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 diarrhea in cats?: 135 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).

Diarrhea with similar medicines

Diarrhea after Emodepside + Praziquantel (Profender) 238 reports · 4.2% of its reports
Diarrhea after Praziquantel + Pyrantel 85 reports · 6.7% of its reports
Diarrhea after Pyrantel 70 reports · 13% of its reports
Diarrhea after Fenbendazole 34 reports · 12% of its reports

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