Heart murmur after Maropitant (Cerenia) in dogs

110 reports to the FDA describe heart murmur in dogs given Maropitant. That is 0.9% of all reports for this medicine, compared with 0.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

110Reports

87%Marked serious

9.1%Recovered

46%Died or euthanised

4 daysTypical onset

How soon it started

Same day

21 21%

1–2 days

25 26%

3–7 days

14 14%

1–4 weeks

15 15%

Over a month

23 23%

How the animals did

Recovered

10 9.1%

Still unwell when reported

38 35%

Died

17 15%

Euthanised

34 31%

Not known

11 10%

Problems reported at the same time

74 67%

54 49%

53 48%

50 45%

49 45%

44 40%

41 37%

37 34%

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 heart murmur in dogs?: 110 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 4 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).

Heart murmur with similar medicines

Heart murmur after Capromorelin (Entyce) 26 reports · 1.7% of its reports

All reported side effects of Maropitant in dogs · Medicines most reported with heart murmur