Injection site reaction after Praziquantel in cats

The FDA has received 101 reports of injection site reaction in cats after Praziquantel. That is 6.1% of all reports for this medicine, compared with 1.2% across reports for all cat medicines, so it is reported unusually often with this medicine.

101Reports

36%Marked serious

20%Recovered

0.0%Died or euthanised

7 daysTypical onset

How soon it started

Same day

7 16%

1–2 days

3 6.7%

3–7 days

17 38%

1–4 weeks

18 40%

Over a month

0 0.0%

How the animals did

Recovered

18 18%

Recovered with lasting effects

2 2.0%

Still unwell when reported

11 11%

Not known

70 69%

Problems reported at the same time

34 34%

14 14%

12 12%

5 5.0%

Skin rash or irritation

4 4.0%

Skin redness

4 4.0%

Locomotor disturbance

3 3.0%

Lameness

3 3.0%

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 injection site reaction in cats?: 101 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 7 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).

All reported side effects of Praziquantel in cats · Medicines most reported with injection site reaction