Increased respiratory rate after Isoflurane in cats

24 reports to the FDA describe increased respiratory rate in cats given Isoflurane. That is 1.2% of all reports for this medicine, compared with 0.3% across reports for all cat medicines, so it is reported unusually often with this medicine.

24Reports

75%Marked serious

33%Recovered

21%Died or euthanised

Same dayTypical onset

How soon it started

Same day

13 72%

1–2 days

3 17%

3–7 days

2 11%

1–4 weeks

0 0.0%

Over a month

0 0.0%

How the animals did

Recovered

7 29%

Recovered with lasting effects

1 4.2%

Still unwell when reported

5 21%

Died

3 13%

Euthanised

2 8.3%

Not known

6 25%

Problems reported at the same time

Increased heart rate

10 42%

Lethargy

7 29%

Loss of appetite

7 29%

Didn't work as expected

6 25%

4 17%

4 17%

4 17%

3 13%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Type: medicine.

Questions owners ask

Can Isoflurane cause increased respiratory rate in cats?: 24 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).

Increased respiratory rate with similar medicines

Increased respiratory rate after Butorphanol 22 reports · 1.0% of its reports
Increased respiratory rate after Furosemide 20 reports · 6.6% of its reports

All reported side effects of Isoflurane in cats · Medicines most reported with increased respiratory rate