Lethargy after Insulin in cats

The FDA has received 472 reports of lethargy in cats after Insulin. That is 13% of all reports for this medicine, compared with 14% across reports for all cat medicines.

472Reports

54%Marked serious

15%Recovered

25%Died or euthanised

4 daysTypical onset

How soon it started

Same day

66 28%

1–2 days

45 19%

3–7 days

31 13%

1–4 weeks

34 14%

Over a month

64 27%

How the animals did

Recovered

69 15%

Recovered with lasting effects

4 0.8%

Still unwell when reported

86 18%

Died

54 11%

Euthanised

63 13%

Not known

196 42%

Problems reported at the same time

Loss of appetite

208 44%

Hypoglycaemia

142 30%

Didn't work as expected

138 29%

117 25%

107 23%

71 15%

59 13%

59 13%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

155

12+ years

229

About this medicine

Insulin treats diabetes.

Questions owners ask

Can Insulin cause lethargy in cats?: 472 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 4 days 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

Lethargy after Velagliflozin (Senvelgo) 639 reports · 13% of its reports
Lethargy after Bexagliflozin (Bexacat) 483 reports · 12% of its reports
Lethargy after Methimazole 311 reports · 17% of its reports

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