Neutrophilia after Maropitant (Cerenia) in dogs

567 reports to the FDA describe neutrophilia in dogs given Maropitant. That is 4.8% of all reports for this medicine, compared with 0.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

567Reports
78%Marked serious
9.0%Recovered
41%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
122 25%
1–2 days
93 19%
3–7 days
77 16%
1–4 weeks
97 20%
Over a month
93 19%

How the animals did

Recovered
46 8.1%
Recovered with lasting effects
5 0.9%
Still unwell when reported
213 38%
Died
75 13%
Euthanised
159 28%
Not known
69 12%

Problems reported at the same time

Age of the animals

Under 1 year
48
1–3 years
121
4–7 years
148
8–11 years
156
12+ years
93

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 neutrophilia in dogs?
567 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 3 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).

Neutrophilia with similar medicines

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