Hyperaesthesia after Ketamine in cats

The FDA has received 29 reports of hyperaesthesia in cats after Ketamine. That is 0.9% of all reports for this medicine, compared with 0.3% across reports for all cat medicines, so it is reported unusually often with this medicine.

29Reports

31%Marked serious

28%Recovered

24%Died or euthanised

Same dayTypical onset

How soon it started

Same day

9 56%

1–2 days

5 31%

3–7 days

0 0.0%

1–4 weeks

2 13%

Over a month

0 0.0%

How the animals did

Recovered

7 24%

Recovered with lasting effects

1 3.4%

Still unwell when reported

6 21%

Died

4 14%

Euthanised

3 10%

Not known

8 28%

Problems reported at the same time

8 28%

7 24%

6 21%

6 21%

Eye or vision problems

5 17%

Lethargy

5 17%

Restlessness or agitation

4 14%

Behaviour change

4 14%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Type: medicine.

Questions owners ask

Can Ketamine cause hyperaesthesia in cats?: 29 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).

Hyperaesthesia with similar medicines

Hyperaesthesia after Butorphanol 24 reports · 1.1% of its reports

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