Platelet disorder after Maropitant (Cerenia) in dogs

The FDA has received 56 reports of platelet disorder in dogs after Maropitant. That is 0.5% of all reports for this medicine, compared with 0.0% across reports for all dog medicines, so it is reported unusually often with this medicine.

56Reports

91%Marked serious

3.6%Recovered

39%Died or euthanised

11 daysTypical onset

How soon it started

Same day

11 20%

1–2 days

8 14%

3–7 days

6 11%

1–4 weeks

9 16%

Over a month

22 39%

How the animals did

Recovered

2 3.6%

Still unwell when reported

18 32%

Died

5 8.9%

Euthanised

17 30%

Not known

14 25%

Problems reported at the same time

43 77%

38 68%

32 57%

32 57%

29 52%

25 45%

24 43%

23 41%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Maropitant prevents vomiting and motion sickness.

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

Questions owners ask

Can Maropitant cause platelet disorder in dogs?: 56 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 11 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).

All reported side effects of Maropitant in dogs · Medicines most reported with platelet disorder