Blood problems after Sulfadimethoxine in dogs

The FDA has received 72 reports of blood problems in dogs after Sulfadimethoxine. That is 7.8% of all reports for this medicine, compared with 1.8% across reports for all dog medicines, so it is reported unusually often with this medicine.

72Reports
43%Marked serious
4.2%Recovered
32%Died or euthanised
8 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
2 5.9%
1–2 days
4 12%
3–7 days
10 29%
1–4 weeks
14 41%
Over a month
4 12%

How the animals did

Recovered
3 4.2%
Still unwell when reported
18 25%
Died
18 25%
Euthanised
5 6.9%
Not known
28 39%

Problems reported at the same time

Age of the animals

Under 1 year
52
1–3 years
6
4–7 years
5
8–11 years
4
12+ years
4

About this medicine

Type: medicine.

Questions owners ask

Can Sulfadimethoxine cause blood problems in dogs?
72 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 8 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).

Blood problems with similar medicines

All reported side effects of Sulfadimethoxine in dogs · Medicines most reported with blood problems