Lethargy after Levetiracetam in dogs

87 reports to the FDA describe lethargy in dogs given Levetiracetam. That is 13% of all reports for this medicine, compared with 11% across reports for all dog medicines.

87Reports
72%Marked serious
22%Recovered
20%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
10 15%
1–2 days
20 31%
3–7 days
7 11%
1–4 weeks
10 15%
Over a month
18 28%

How the animals did

Recovered
18 21%
Recovered with lasting effects
1 1.1%
Still unwell when reported
30 34%
Died
7 8.0%
Euthanised
10 11%
Not known
21 24%

Problems reported at the same time

Age of the animals

Under 1 year
3
1–3 years
8
4–7 years
28
8–11 years
30
12+ years
18

About this medicine

Type: medicine.

Questions owners ask

Can Levetiracetam cause lethargy in dogs?
87 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).

Lethargy with similar medicines

All reported side effects of Levetiracetam in dogs · Medicines most reported with lethargy