Blood in stool after Maropitant (Cerenia) in dogs

The FDA has received 224 reports of blood in stool in dogs after Maropitant. That is 1.9% of all reports for this medicine, compared with 0.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

224Reports

71%Marked serious

14%Recovered

39%Died or euthanised

2 daysTypical onset

How soon it started

Same day

53 29%

1–2 days

40 22%

3–7 days

22 12%

1–4 weeks

30 17%

Over a month

35 19%

How the animals did

Recovered

31 14%

Still unwell when reported

71 32%

Died

39 17%

Euthanised

48 21%

Not known

35 16%

Problems reported at the same time

136 61%

128 57%

115 51%

93 42%

87 39%

83 37%

76 34%

54 24%

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 blood in stool in dogs?: 224 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 2 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 blood in stool