Lethargy after Ketamine in cats

244 reports to the FDA describe lethargy in cats given Ketamine. That is 7.5% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported less often than average with this medicine.

244Reports
50%Marked serious
18%Recovered
30%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
80 43%
1–2 days
64 34%
3–7 days
15 8.1%
1–4 weeks
21 11%
Over a month
6 3.2%

How the animals did

Recovered
43 18%
Still unwell when reported
66 27%
Died
43 18%
Euthanised
29 12%
Not known
63 26%

Problems reported at the same time

Age of the animals

Under 1 year
71
1–3 years
45
4–7 years
38
8–11 years
45
12+ years
33

About this medicine

Type: medicine.

Questions owners ask

Can Ketamine cause lethargy in cats?
244 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).

Lethargy with similar medicines

All reported side effects of Ketamine in cats · Medicines most reported with lethargy