Eye or vision problems after Isoflurane in cats

123 reports to the FDA describe eye or vision problems in cats given Isoflurane. That is 6.1% of all reports for this medicine, compared with 2.3% across reports for all cat medicines, so it is reported unusually often with this medicine.

123Reports
55%Marked serious
19%Recovered
20%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
62 71%
1–2 days
13 15%
3–7 days
7 8.0%
1–4 weeks
2 2.3%
Over a month
3 3.4%

How the animals did

Recovered
19 15%
Recovered with lasting effects
4 3.3%
Still unwell when reported
41 33%
Died
12 9.8%
Euthanised
12 9.8%
Not known
35 28%

Problems reported at the same time

Age of the animals

Under 1 year
25
1–3 years
19
4–7 years
20
8–11 years
24
12+ years
24

About this medicine

Type: medicine.

Questions owners ask

Can Isoflurane cause eye or vision problems in cats?
123 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).

Eye or vision problems with similar medicines

All reported side effects of Isoflurane in cats · Medicines most reported with eye or vision problems