Inappropriate urination after Maropitant (Cerenia) in cats

The FDA has received 64 reports of inappropriate urination in cats after Maropitant. That is 1.7% of all reports for this medicine, compared with 0.7% across reports for all cat medicines, so it is reported unusually often with this medicine.

64Reports

72%Marked serious

13%Recovered

38%Died or euthanised

1 daysTypical onset

How soon it started

Same day

23 41%

1–2 days

17 30%

3–7 days

4 7.1%

1–4 weeks

9 16%

Over a month

3 5.4%

How the animals did

Recovered

8 13%

Still unwell when reported

24 38%

Died

10 16%

Euthanised

14 22%

Not known

8 13%

Problems reported at the same time

41 64%

29 45%

24 38%

23 36%

17 27%

17 27%

14 22%

13 20%

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 inappropriate urination in cats?: 64 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).

Inappropriate urination with similar medicines

Inappropriate urination after Mirtazapine (Mirataz) 27 reports · 1.4% of its reports

All reported side effects of Maropitant in cats · Medicines most reported with inappropriate urination