Wobbliness (ataxia) after Isoflurane in cats

The FDA has received 132 reports of wobbliness (ataxia) in cats after Isoflurane. That is 6.5% of all reports for this medicine, compared with 4.7% across reports for all cat medicines.

132Reports
54%Marked serious
22%Recovered
17%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
58 51%
1–2 days
44 39%
3–7 days
3 2.7%
1–4 weeks
5 4.4%
Over a month
3 2.7%

How the animals did

Recovered
29 22%
Still unwell when reported
52 39%
Died
9 6.8%
Euthanised
13 9.8%
Not known
29 22%

Problems reported at the same time

Age of the animals

Under 1 year
37
1–3 years
12
4–7 years
30
8–11 years
23
12+ years
30

About this medicine

Type: medicine.

Questions owners ask

Can Isoflurane cause wobbliness (ataxia) in cats?
132 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).

Wobbliness (ataxia) with similar medicines

All reported side effects of Isoflurane in cats · Medicines most reported with wobbliness (ataxia)