Behaviour change after Ketamine in cats

The FDA has received 247 reports of behaviour change in cats after Ketamine. That is 7.6% of all reports for this medicine, compared with 5.4% across reports for all cat medicines.

247Reports
30%Marked serious
29%Recovered
9.7%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
124 63%
1–2 days
51 26%
3–7 days
10 5.1%
1–4 weeks
7 3.5%
Over a month
6 3.0%

How the animals did

Recovered
69 28%
Recovered with lasting effects
2 0.8%
Still unwell when reported
78 32%
Died
16 6.5%
Euthanised
8 3.2%
Not known
74 30%

Problems reported at the same time

Age of the animals

Under 1 year
84
1–3 years
48
4–7 years
49
8–11 years
20
12+ years
26

About this medicine

Type: medicine.

Questions owners ask

Can Ketamine cause behaviour change in cats?
247 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 the same 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).

Behaviour change with similar medicines

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