Behaviour change after Praziquantel in dogs

31 reports to the FDA describe behaviour change in dogs given Praziquantel. That is 2.8% of all reports for this medicine, compared with 2.5% across reports for all dog medicines.

31Reports

39%Marked serious

26%Recovered

3.2%Died or euthanised

1 daysTypical onset

How soon it started

Same day

12 46%

1–2 days

6 23%

3–7 days

4 15%

1–4 weeks

2 7.7%

Over a month

2 7.7%

How the animals did

Recovered

8 26%

Still unwell when reported

7 23%

Died

1 3.2%

Not known

15 48%

Problems reported at the same time

11 35%

9 29%

8 26%

5 16%

5 16%

Restlessness or agitation

4 13%

Didn't stop worms

4 13%

Digestive tract disorder

3 9.7%

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 behaviour change in dogs?: 31 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).

Behaviour change with similar medicines

Behaviour change after Pyrantel + Sarolaner (Simparica Trio) 1,082 reports · 2.0% of its reports
Behaviour change after Febantel + Praziquantel + Pyrantel (Drontal Plus) 285 reports · 4.2% of its reports
Behaviour change after Fenbendazole 213 reports · 3.6% of its reports
Behaviour change after Pyrantel 103 reports · 2.2% of its reports
Behaviour change after Praziquantel + Pyrantel 147 reports · 4.0% of its reports

All reported side effects of Praziquantel in dogs · Medicines most reported with behaviour change