Bradycardia after Maropitant (Cerenia) in cats

The FDA has received 105 reports of bradycardia in cats after Maropitant. That is 2.7% of all reports for this medicine, compared with 0.5% across reports for all cat medicines, so it is reported unusually often with this medicine.

105Reports

74%Marked serious

32%Recovered

36%Died or euthanised

Same dayTypical onset

How soon it started

Same day

63 62%

1–2 days

18 18%

3–7 days

6 5.9%

1–4 weeks

7 6.9%

Over a month

8 7.8%

How the animals did

Recovered

34 32%

Still unwell when reported

19 18%

Died

16 15%

Euthanised

22 21%

Not known

14 13%

Problems reported at the same time

38 36%

33 31%

32 30%

30 29%

25 24%

18 17%

17 16%

15 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 bradycardia in cats?: 105 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 the same 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).

Bradycardia with similar medicines

Bradycardia after Capromorelin (Entyce) 121 reports · 15% of its reports

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