Hyperglycaemia after Mirtazapine (Mirataz) in cats

82 reports to the FDA describe hyperglycaemia in cats given Mirtazapine. That is 4.4% of all reports for this medicine, compared with 1.9% across reports for all cat medicines, so it is reported unusually often with this medicine.

82Reports

88%Marked serious

4.9%Recovered

39%Died or euthanised

4 daysTypical onset

How soon it started

Same day

21 28%

1–2 days

16 22%

3–7 days

8 11%

1–4 weeks

16 22%

Over a month

13 18%

How the animals did

Recovered

4 4.9%

Still unwell when reported

32 39%

Died

12 15%

Euthanised

20 24%

Not known

14 17%

Problems reported at the same time

62 76%

41 50%

37 45%

35 43%

32 39%

25 30%

22 27%

21 26%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Mirtazapine stimulates appetite (cats: ointment applied to the ear).

Products with this ingredient include Mirataz. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Mirtazapine cause hyperglycaemia in cats?: 82 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).

Hyperglycaemia with similar medicines

Hyperglycaemia after Maropitant (Cerenia) 239 reports · 6.2% of its reports
Hyperglycaemia after Capromorelin (Entyce) 52 reports · 6.3% of its reports

All reported side effects of Mirtazapine in cats · Medicines most reported with hyperglycaemia