Praziquantel side effects in cats

1,661 reports sent to the FDA between 1995 and 2026 involve Praziquantel in cats. The most reported problems were vomiting, lethargy, loss of appetite. 22% were marked serious, and where it was recorded, signs eased after stopping the medicine in 0% of cases.

1,661Reports
22%Marked serious
77%Only medicine involved
23%Recovered
6.1%Died or euthanised
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About this medicine

Praziquantel treats tapeworms.

Most reported side effects

Share = percentage of this medicine's reports that mention the problem. One report can list several problems.

Reports that it didn't work

Some reports are about the medicine not working (for example a cat still getting fleas or heartworm), not about a side effect.

How soon problems started

Same day
568 43%
1–2 days
294 22%
3–7 days
155 12%
1–4 weeks
189 14%
Over a month
129 9.7%

Time from the first dose to the first sign, where both dates were reported (1,335 reports).

How the animals did

Recovered
387 23%
Recovered with lasting effects
2 0.1%
Still unwell when reported
186 11%
Died
84 5.1%
Euthanised
18 1.1%
Not known
984 59%

Breeds named most often

Popular breeds appear more often because there are more of them.

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