Hypokalaemia after Maropitant (Cerenia) in cats

117 reports to the FDA describe hypokalaemia in cats given Maropitant. That is 3.0% 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.

117Reports

87%Marked serious

9.4%Recovered

35%Died or euthanised

2 daysTypical onset

How soon it started

Same day

29 28%

1–2 days

29 28%

3–7 days

17 16%

1–4 weeks

8 7.6%

Over a month

22 21%

How the animals did

Recovered

11 9.4%

Still unwell when reported

51 44%

Died

12 10%

Euthanised

29 25%

Not known

14 12%

Problems reported at the same time

63 54%

55 47%

52 44%

51 44%

44 38%

42 36%

40 34%

39 33%

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 hypokalaemia in cats?: 117 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 2 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).

Hypokalaemia with similar medicines

Hypokalaemia after Mirtazapine (Mirataz) 48 reports · 2.6% of its reports

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