Nasal congestion after Maropitant (Cerenia) in dogs

The FDA has received 30 reports of nasal congestion in dogs after Maropitant. That is 0.3% of all reports for this medicine, compared with 0.0% across reports for all dog medicines, so it is reported unusually often with this medicine.

30Reports

73%Marked serious

6.7%Recovered

10%Died or euthanised

11 daysTypical onset

How soon it started

Same day

3 13%

1–2 days

5 21%

3–7 days

4 17%

1–4 weeks

4 17%

Over a month

8 33%

How the animals did

Recovered

2 6.7%

Still unwell when reported

14 47%

Euthanised

3 10%

Not known

11 37%

Problems reported at the same time

Nasal discharge

16 53%

Vomiting

11 37%

Loss of appetite

11 37%

Didn't work as expected

10 33%

9 30%

8 27%

8 27%

7 23%

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 nasal congestion in dogs?: 30 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 11 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 nasal congestion