Didn't work as expected after Praziquantel in dogs

The FDA has received 34 reports of didn't work as expected in dogs after Praziquantel. That is 3.1% of all reports for this medicine, compared with 13% across reports for all dog medicines, so it is reported less often than average with this medicine.

34Reports
35%Marked serious
12%Recovered
0.0%Died or euthanised
45 daysTypical onset
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How soon it started

Same day
0 0.0%
1–2 days
0 0.0%
3–7 days
1 4.2%
1–4 weeks
9 38%
Over a month
14 58%

How the animals did

Recovered
4 12%
Still unwell when reported
3 8.8%
Not known
27 79%

Problems reported at the same time

Didn't stop fleas
2 5.9%
Cough
2 5.9%
Licking
1 2.9%
Abscess
1 2.9%
Nasal discharge
1 2.9%

Age of the animals

Under 1 year
22
1–3 years
7
4–7 years
1
8–11 years
1
12+ years
0

About this medicine

Praziquantel treats tapeworms.

Questions owners ask

Can Praziquantel cause didn't work as expected in dogs?
34 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 45 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).

Didn't work as expected with similar medicines

All reported side effects of Praziquantel in dogs · Medicines most reported with didn't work as expected