Seizures after Isoflurane in dogs

The FDA has received 162 reports of seizures in dogs after Isoflurane. That is 5.9% of all reports for this medicine, compared with 4.4% across reports for all dog medicines.

162Reports
85%Marked serious
41%Recovered
25%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
81 60%
1–2 days
23 17%
3–7 days
11 8.1%
1–4 weeks
15 11%
Over a month
6 4.4%

How the animals did

Recovered
63 39%
Recovered with lasting effects
3 1.9%
Still unwell when reported
34 21%
Died
25 15%
Euthanised
15 9.3%
Not known
22 14%

Problems reported at the same time

Age of the animals

Under 1 year
20
1–3 years
34
4–7 years
55
8–11 years
32
12+ years
6

About this medicine

Type: medicine.

Questions owners ask

Can Isoflurane cause seizures in dogs?
162 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).

Seizures with similar medicines

All reported side effects of Isoflurane in dogs · Medicines most reported with seizures