Decreased haemoglobin after Maropitant (Cerenia) in dogs

86 reports to the FDA describe decreased haemoglobin in dogs given Maropitant. That is 0.7% 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.

86Reports

90%Marked serious

7.0%Recovered

42%Died or euthanised

8 daysTypical onset

How soon it started

Same day

13 17%

1–2 days

10 13%

3–7 days

14 18%

1–4 weeks

19 25%

Over a month

20 26%

How the animals did

Recovered

6 7.0%

Still unwell when reported

30 35%

Died

12 14%

Euthanised

24 28%

Not known

14 16%

Problems reported at the same time

62 72%

51 59%

49 57%

46 53%

Decreased red blood cell count

43 50%

Vomiting

42 49%

Death

33 38%

Monocytosis

33 38%

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 decreased haemoglobin in dogs?: 86 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 8 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).

Decreased haemoglobin with similar medicines

Decreased haemoglobin after Capromorelin (Entyce) 23 reports · 1.5% of its reports

All reported side effects of Maropitant in dogs · Medicines most reported with decreased haemoglobin