Dilated pupils after Maropitant (Cerenia) in cats

168 reports to the FDA describe dilated pupils in cats given Maropitant. That is 4.4% of all reports for this medicine, compared with 1.4% across reports for all cat medicines, so it is reported unusually often with this medicine.

168Reports

60%Marked serious

24%Recovered

26%Died or euthanised

1 daysTypical onset

How soon it started

Same day

76 48%

1–2 days

56 35%

3–7 days

12 7.6%

1–4 weeks

8 5.1%

Over a month

6 3.8%

How the animals did

Recovered

39 23%

Recovered with lasting effects

1 0.6%

Still unwell when reported

61 36%

Died

25 15%

Euthanised

18 11%

Not known

24 14%

Problems reported at the same time

Loss of appetite

71 42%

Behaviour change

55 33%

Restlessness or agitation

43 26%

41 24%

34 20%

31 18%

29 17%

23 14%

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 dilated pupils in cats?: 168 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).

Dilated pupils with similar medicines

Dilated pupils after Mirtazapine (Mirataz) 52 reports · 2.8% of its reports

All reported side effects of Maropitant in cats · Medicines most reported with dilated pupils