Lethargy after Sevoflurane in cats

50 reports to the FDA describe lethargy in cats given Sevoflurane. That is 13% of all reports for this medicine, compared with 14% across reports for all cat medicines.

50Reports
52%Marked serious
22%Recovered
26%Died or euthanised
1 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
16 42%
1–2 days
13 34%
3–7 days
5 13%
1–4 weeks
3 7.9%
Over a month
1 2.6%

How the animals did

Recovered
11 22%
Still unwell when reported
14 28%
Died
6 12%
Euthanised
7 14%
Not known
12 24%

Problems reported at the same time

13 26%
Blood problems
9 18%
Liver problems
8 16%

Age of the animals

Under 1 year
7
1–3 years
4
4–7 years
7
8–11 years
13
12+ years
14

About this medicine

Type: medicine.

Questions owners ask

Can Sevoflurane cause lethargy in cats?
50 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 1 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).

Lethargy with similar medicines

All reported side effects of Sevoflurane in cats · Medicines most reported with lethargy