Lethargy after Anesthesia in cats

The FDA has received 24 reports of lethargy in cats after Anesthesia. That is 26% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

24Reports
75%Marked serious
17%Recovered
25%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
4 17%
1–2 days
7 29%
3–7 days
5 21%
1–4 weeks
7 29%
Over a month
1 4.2%

How the animals did

Recovered
4 17%
Still unwell when reported
13 54%
Died
4 17%
Euthanised
2 8.3%
Not known
1 4.2%

Problems reported at the same time

Vomiting
7 29%
Death
6 25%
Fever
6 25%
Intentional misuse
5 21%
Blood problems
4 17%
Liver problems
3 13%
Wobbliness (ataxia)
3 13%

Age of the animals

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

About this medicine

Type: medicine.

Questions owners ask

Can Anesthesia cause lethargy in cats?
24 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 Anesthesia in cats · Medicines most reported with lethargy