Loss of appetite after Praziquantel in dogs

The FDA has received 118 reports of loss of appetite in dogs after Praziquantel. That is 11% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

118Reports
40%Marked serious
16%Recovered
15%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
24 29%
1–2 days
25 30%
3–7 days
13 16%
1–4 weeks
6 7.3%
Over a month
14 17%

How the animals did

Recovered
17 14%
Recovered with lasting effects
2 1.7%
Still unwell when reported
18 15%
Died
14 12%
Euthanised
4 3.4%
Not known
63 53%

Problems reported at the same time

59 50%
46 39%
42 36%
16 14%
Adipsia
15 13%
Drooling
8 6.8%
Liver problems
8 6.8%

Age of the animals

Under 1 year
35
1–3 years
23
4–7 years
17
8–11 years
17
12+ years
20

About this medicine

Praziquantel treats tapeworms.

Questions owners ask

Can Praziquantel cause loss of appetite in dogs?
118 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).

Loss of appetite with similar medicines

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