Skin redness after Ondansetron in dogs

The FDA has received 37 reports of skin redness in dogs after Ondansetron. That is 5.6% of all reports for this medicine, compared with 1.0% across reports for all dog medicines, so it is reported unusually often with this medicine.

37Reports
84%Marked serious
14%Recovered
27%Died or euthanised
43 daysTypical onset
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How soon it started

Same day
8 28%
1–2 days
1 3.4%
3–7 days
1 3.4%
1–4 weeks
3 10%
Over a month
16 55%

How the animals did

Recovered
5 14%
Still unwell when reported
16 43%
Died
3 8.1%
Euthanised
7 19%
Not known
6 16%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
5
4–7 years
11
8–11 years
16
12+ years
2

About this medicine

Type: medicine.

Questions owners ask

Can Ondansetron cause skin redness in dogs?
37 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 43 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).

Skin redness with similar medicines

All reported side effects of Ondansetron in dogs · Medicines most reported with skin redness