Vocalising after Isoflurane in cats

The FDA has received 79 reports of vocalising in cats after Isoflurane. That is 3.9% of all reports for this medicine, compared with 3.1% across reports for all cat medicines.

79Reports
67%Marked serious
24%Recovered
41%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
38 54%
1–2 days
21 30%
3–7 days
6 8.5%
1–4 weeks
3 4.2%
Over a month
3 4.2%

How the animals did

Recovered
19 24%
Still unwell when reported
20 25%
Died
19 24%
Euthanised
13 16%
Not known
8 10%

Problems reported at the same time

Age of the animals

Under 1 year
11
1–3 years
8
4–7 years
17
8–11 years
21
12+ years
20

About this medicine

Type: medicine.

Questions owners ask

Can Isoflurane cause vocalising in cats?
79 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).

Vocalising with similar medicines

All reported side effects of Isoflurane in cats · Medicines most reported with vocalising