Weight loss after Isoflurane in cats

The FDA has received 76 reports of weight loss in cats after Isoflurane. That is 3.7% of all reports for this medicine, compared with 4.6% across reports for all cat medicines.

76Reports
74%Marked serious
21%Recovered
20%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
27 40%
1–2 days
18 27%
3–7 days
8 12%
1–4 weeks
12 18%
Over a month
2 3.0%

How the animals did

Recovered
15 20%
Recovered with lasting effects
1 1.3%
Still unwell when reported
30 39%
Died
8 11%
Euthanised
7 9.2%
Not known
15 20%

Problems reported at the same time

Age of the animals

Under 1 year
14
1–3 years
14
4–7 years
8
8–11 years
22
12+ years
17

About this medicine

Type: medicine.

Questions owners ask

Can Isoflurane cause weight loss in cats?
76 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).

Weight loss with similar medicines

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