Vomiting after Mirtazapine (Mirataz) in dogs

The FDA has received 96 reports of vomiting in dogs after Mirtazapine. That is 33% of all reports for this medicine, compared with 28% across reports for all dog medicines.

96Reports

78%Marked serious

14%Recovered

42%Died or euthanised

13 daysTypical onset

How soon it started

Same day

12 14%

1–2 days

16 19%

3–7 days

9 11%

1–4 weeks

24 29%

Over a month

22 27%

How the animals did

Recovered

13 14%

Still unwell when reported

33 34%

Died

11 11%

Euthanised

29 30%

Not known

10 10%

Problems reported at the same time

75 78%

47 49%

47 49%

39 41%

37 39%

33 34%

Abnormal ultrasound finding

24 25%

Weight loss

20 21%

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 vomiting in dogs?: 96 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 13 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).

Vomiting with similar medicines

Vomiting after Maropitant (Cerenia) 4,253 reports · 36% of its reports
Vomiting after Capromorelin (Entyce) 305 reports · 20% of its reports

All reported side effects of Mirtazapine in dogs · Medicines most reported with vomiting