Weakness after Maropitant (Cerenia) in dogs

The FDA has received 618 reports of weakness in dogs after Maropitant. That is 5.2% of all reports for this medicine, compared with 1.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

618Reports

76%Marked serious

12%Recovered

45%Died or euthanised

2 daysTypical onset

How soon it started

Same day

184 35%

1–2 days

96 18%

3–7 days

72 14%

1–4 weeks

88 17%

Over a month

82 16%

How the animals did

Recovered

70 11%

Recovered with lasting effects

2 0.3%

Still unwell when reported

207 33%

Died

129 21%

Euthanised

151 24%

Not known

59 9.5%

Problems reported at the same time

302 49%

292 47%

282 46%

281 45%

215 35%

178 29%

157 25%

146 24%

Age of the animals

Under 1 year

1–3 years

4–7 years

115

8–11 years

163

12+ years

173

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 weakness in dogs?: 618 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).

Weakness with similar medicines

Weakness after Capromorelin (Entyce) 101 reports · 6.7% of its reports

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