Tremors after Maropitant (Cerenia) in cats

The FDA has received 118 reports of tremors in cats after Maropitant. That is 3.1% of all reports for this medicine, compared with 2.6% across reports for all cat medicines.

118Reports

64%Marked serious

18%Recovered

24%Died or euthanised

Same dayTypical onset

How soon it started

Same day

60 55%

1–2 days

14 13%

3–7 days

16 15%

1–4 weeks

10 9.2%

Over a month

9 8.3%

How the animals did

Recovered

20 17%

Recovered with lasting effects

1 0.8%

Still unwell when reported

45 38%

Died

10 8.5%

Euthanised

18 15%

Not known

24 20%

Problems reported at the same time

46 39%

37 31%

29 25%

28 24%

27 23%

22 19%

21 18%

18 15%

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 tremors in cats?: 118 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).

Tremors with similar medicines

Tremors after Mirtazapine (Mirataz) 46 reports · 2.4% of its reports

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