Wobbliness (ataxia) after Sulfadimethoxine in dogs

35 reports to the FDA describe wobbliness (ataxia) in dogs given Sulfadimethoxine. That is 3.8% of all reports for this medicine, compared with 2.6% across reports for all dog medicines.

35Reports
29%Marked serious
20%Recovered
11%Died or euthanised
7 daysTypical onset
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How soon it started

Same day
5 28%
1–2 days
2 11%
3–7 days
4 22%
1–4 weeks
4 22%
Over a month
3 17%

How the animals did

Recovered
6 17%
Recovered with lasting effects
1 2.9%
Still unwell when reported
9 26%
Died
3 8.6%
Euthanised
1 2.9%
Not known
15 43%

Problems reported at the same time

5 14%
Eye or vision problems
4 11%

Age of the animals

Under 1 year
26
1–3 years
2
4–7 years
2
8–11 years
4
12+ years
1

About this medicine

Type: medicine.

Questions owners ask

Can Sulfadimethoxine cause wobbliness (ataxia) in dogs?
35 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 7 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).

Wobbliness (ataxia) with similar medicines

All reported side effects of Sulfadimethoxine in dogs · Medicines most reported with wobbliness (ataxia)