Weight loss after Ketamine in cats

64 reports to the FDA describe weight loss in cats given Ketamine. That is 2.0% of all reports for this medicine, compared with 4.6% across reports for all cat medicines, so it is reported less often than average with this medicine.

64Reports
69%Marked serious
14%Recovered
30%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
16 32%
1–2 days
15 30%
3–7 days
7 14%
1–4 weeks
9 18%
Over a month
3 6.0%

How the animals did

Recovered
6 9.4%
Recovered with lasting effects
3 4.7%
Still unwell when reported
21 33%
Died
7 11%
Euthanised
12 19%
Not known
15 23%

Problems reported at the same time

Age of the animals

Under 1 year
10
1–3 years
11
4–7 years
14
8–11 years
12
12+ years
16

About this medicine

Type: medicine.

Questions owners ask

Can Ketamine cause weight loss in cats?
64 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 2 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).

Weight loss with similar medicines

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