Underdose after Praziquantel in dogs

28 reports to the FDA describe underdose in dogs given Praziquantel. That is 2.5% of all reports for this medicine, compared with 1.0% across reports for all dog medicines, so it is reported unusually often with this medicine.

28Reports

39%Marked serious

21%Recovered

0.0%Died or euthanised

3 daysTypical onset

How soon it started

Same day

7 33%

1–2 days

3 14%

3–7 days

5 24%

1–4 weeks

5 24%

Over a month

1 4.8%

How the animals did

Recovered

6 21%

Still unwell when reported

2 7.1%

Not known

20 71%

Problems reported at the same time

Didn't stop worms

10 36%

Lethargy

5 18%

Vomiting

4 14%

Injection site reaction

3 11%

Diarrhea

3 11%

Overdose

3 11%

Swelling

2 7.1%

Skin redness

2 7.1%

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 underdose in dogs?: 28 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 3 days 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).

Underdose with similar medicines

Underdose after Pyrantel + Sarolaner (Simparica Trio) 216 reports · 0.4% of its reports
Underdose after Febantel + Praziquantel + Pyrantel (Drontal Plus) 247 reports · 3.7% of its reports
Underdose after Fenbendazole 229 reports · 3.9% of its reports
Underdose after Pyrantel 82 reports · 1.7% of its reports
Underdose after Praziquantel + Pyrantel 65 reports · 1.8% of its reports

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