Weight loss after Maropitant (Cerenia) in dogs

The FDA has received 681 reports of weight loss in dogs after Maropitant. That is 5.7% of all reports for this medicine, compared with 1.7% across reports for all dog medicines, so it is reported unusually often with this medicine.

681Reports

72%Marked serious

9.3%Recovered

32%Died or euthanised

4 daysTypical onset

How soon it started

Same day

120 21%

1–2 days

98 18%

3–7 days

102 18%

1–4 weeks

115 21%

Over a month

124 22%

How the animals did

Recovered

63 9.3%

Still unwell when reported

292 43%

Died

81 12%

Euthanised

134 20%

Not known

111 16%

Problems reported at the same time

502 74%

401 59%

344 51%

278 41%

217 32%

216 32%

206 30%

145 21%

Age of the animals

Under 1 year

1–3 years

120

4–7 years

170

8–11 years

211

12+ years

121

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 weight loss in dogs?: 681 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).

Weight loss with similar medicines

Weight loss after Capromorelin (Entyce) 84 reports · 5.5% of its reports
Weight loss after Mirtazapine (Mirataz) 46 reports · 16% of its reports

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