Increased percentage reticulocytes after Maropitant (Cerenia) in dogs

108 reports to the FDA describe increased percentage reticulocytes in dogs given Maropitant. That is 0.9% of all reports for this medicine, compared with 0.1% across reports for all dog medicines, so it is reported unusually often with this medicine.

108Reports

79%Marked serious

11%Recovered

35%Died or euthanised

10 daysTypical onset

How soon it started

Same day

14 15%

1–2 days

13 14%

3–7 days

16 17%

1–4 weeks

19 21%

Over a month

30 33%

How the animals did

Recovered

12 11%

Still unwell when reported

38 35%

Died

23 21%

Euthanised

15 14%

Not known

20 19%

Problems reported at the same time

67 62%

66 61%

64 59%

50 46%

46 43%

40 37%

38 35%

36 33%

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 increased percentage reticulocytes in dogs?: 108 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 10 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).

Increased percentage reticulocytes with similar medicines

Increased percentage reticulocytes after Capromorelin (Entyce) 21 reports · 1.4% of its reports

All reported side effects of Maropitant in dogs · Medicines most reported with increased percentage reticulocytes