Underdose after Maropitant (Cerenia) in dogs

The FDA has received 120 reports of underdose in dogs after Maropitant. That is 1.0% of all reports for this medicine, compared with 1.0% across reports for all dog medicines.

120Reports

73%Marked serious

20%Recovered

25%Died or euthanised

1 daysTypical onset

How soon it started

Same day

44 41%

1–2 days

17 16%

3–7 days

7 6.5%

1–4 weeks

14 13%

Over a month

25 23%

How the animals did

Recovered

24 20%

Still unwell when reported

45 38%

Died

12 10%

Euthanised

18 15%

Not known

21 18%

Problems reported at the same time

47 39%

46 38%

36 30%

28 23%

28 23%

Didn't work as expected

27 23%

Intentional misuse

21 18%

Liver problems

19 16%

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 underdose in dogs?: 120 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).

Underdose with similar medicines

Underdose after Capromorelin (Entyce) 25 reports · 1.7% of its reports

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