Inappropriate defecation after Maropitant (Cerenia) in dogs

71 reports to the FDA describe inappropriate defecation in dogs given Maropitant. That is 0.6% of all reports for this medicine, compared with 0.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

71Reports

85%Marked serious

14%Recovered

38%Died or euthanised

1 daysTypical onset

How soon it started

Same day

26 44%

1–2 days

11 19%

3–7 days

4 6.8%

1–4 weeks

7 12%

Over a month

11 19%

How the animals did

Recovered

10 14%

Still unwell when reported

26 37%

Died

16 23%

Euthanised

11 15%

Not known

8 11%

Problems reported at the same time

46 65%

30 42%

28 39%

27 38%

27 38%

25 35%

25 35%

Inappropriate urination

24 34%

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 inappropriate defecation in dogs?: 71 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 1 day 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 inappropriate defecation