Somnolence after Maropitant (Cerenia) in dogs

26 reports to the FDA describe somnolence in dogs given Maropitant. That is 0.2% 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.

26Reports

7.7%Marked serious

15%Recovered

15%Died or euthanised

–Typical onset

How the animals did

Recovered

4 15%

Still unwell when reported

1 3.8%

Died

3 12%

Euthanised

1 3.8%

Not known

17 65%

Problems reported at the same time

9 35%

4 15%

4 15%

4 15%

4 15%

3 12%

2 7.7%

2 7.7%

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 somnolence in dogs?: 26 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.
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 somnolence