Cyanosis after Alfaxalone in cats

21 reports to the FDA describe cyanosis in cats given Alfaxalone. That is 4.5% 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.

21Reports
100%Marked serious
19%Recovered
52%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
18 90%
1–2 days
2 10%
3–7 days
0 0.0%
1–4 weeks
0 0.0%
Over a month
0 0.0%

How the animals did

Recovered
3 14%
Recovered with lasting effects
1 4.8%
Still unwell when reported
5 24%
Died
11 52%
Not known
1 4.8%

Problems reported at the same time

11 52%
Respiratory arrest
5 24%
Apnoea
5 24%
Eye or vision problems
4 19%
Cardiorespiratory arrest
3 14%

Age of the animals

Under 1 year
9
1–3 years
2
4–7 years
1
8–11 years
4
12+ years
5

About this medicine

Type: medicine.

Questions owners ask

Can Alfaxalone cause cyanosis in cats?
21 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 Alfaxalone in cats · Medicines most reported with cyanosis