Death after Isoflurane in cats

377 reports to the FDA describe death in cats given Isoflurane. That is 19% of all reports for this medicine, compared with 8.9% across reports for all cat medicines, so it is reported unusually often with this medicine.

377Reports
80%Marked serious
0.3%Recovered
99%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
179 65%
1–2 days
49 18%
3–7 days
30 11%
1–4 weeks
14 5.1%
Over a month
4 1.4%

How the animals did

Recovered
1 0.3%
Died
302 80%
Euthanised
73 19%
Not known
1 0.3%

Problems reported at the same time

Age of the animals

Under 1 year
112
1–3 years
56
4–7 years
59
8–11 years
67
12+ years
59

About this medicine

Type: medicine.

Questions owners ask

Can Isoflurane cause death in cats?
377 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).

Death with similar medicines

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