Vomiting after Ormetoprim + Sulfadimethoxine in dogs

The FDA has received 117 reports of vomiting in dogs after Ormetoprim + Sulfadimethoxine. That is 13% of all reports for this medicine, compared with 28% across reports for all dog medicines, so it is reported less often than average with this medicine.

117Reports
6.8%Marked serious
6.8%Recovered
26%Died or euthanised
10 daysTypical onset
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How soon it started

Same day
7 27%
1–2 days
2 7.7%
3–7 days
4 15%
1–4 weeks
6 23%
Over a month
7 27%

How the animals did

Recovered
8 6.8%
Still unwell when reported
13 11%
Died
28 24%
Euthanised
2 1.7%
Not known
66 56%

Problems reported at the same time

Age of the animals

Under 1 year
12
1–3 years
29
4–7 years
29
8–11 years
34
12+ years
9

About this medicine

Type: medicine.

Questions owners ask

Can Ormetoprim + Sulfadimethoxine cause vomiting in dogs?
117 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 10 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).

Vomiting with similar medicines

All reported side effects of Ormetoprim + Sulfadimethoxine in dogs · Medicines most reported with vomiting