Diarrhea after Maropitant (Cerenia) in dogs

2,143 reports to the FDA describe diarrhea in dogs given Maropitant. That is 18% of all reports for this medicine, compared with 8.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

2,143Reports
66%Marked serious
17%Recovered
24%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
644 35%
1–2 days
410 22%
3–7 days
214 12%
1–4 weeks
251 14%
Over a month
325 18%

How the animals did

Recovered
362 17%
Recovered with lasting effects
7 0.3%
Still unwell when reported
946 44%
Died
213 9.9%
Euthanised
305 14%
Not known
310 14%

Problems reported at the same time

Age of the animals

Under 1 year
275
1–3 years
490
4–7 years
545
8–11 years
485
12+ years
328

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 diarrhea in dogs?
2,143 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).

Diarrhea with similar medicines

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