Cyanosis after Isoflurane in cats

The FDA has received 42 reports of cyanosis in cats after Isoflurane. That is 2.1% of all reports for this medicine, compared with 0.4% across reports for all cat medicines, so it is reported unusually often with this medicine.

42Reports
76%Marked serious
12%Recovered
67%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
31 97%
1–2 days
0 0.0%
3–7 days
1 3.1%
1–4 weeks
0 0.0%
Over a month
0 0.0%

How the animals did

Recovered
5 12%
Still unwell when reported
7 17%
Died
27 64%
Euthanised
1 2.4%
Not known
2 4.8%

Problems reported at the same time

28 67%
5 12%
Cardiac disorder
4 9.5%
Hypoxia
4 9.5%

Age of the animals

Under 1 year
15
1–3 years
7
4–7 years
10
8–11 years
5
12+ years
4

About this medicine

Type: medicine.

Questions owners ask

Can Isoflurane cause cyanosis in cats?
42 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).

Cyanosis with similar medicines

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