Loss of appetite after Sulfadimethoxine in cats

The FDA has received 30 reports of loss of appetite in cats after Sulfadimethoxine. That is 9.5% of all reports for this medicine, compared with 14% across reports for all cat medicines.

30Reports
47%Marked serious
10%Recovered
30%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
4 21%
1–2 days
6 32%
3–7 days
2 11%
1–4 weeks
5 26%
Over a month
2 11%

How the animals did

Recovered
3 10%
Still unwell when reported
7 23%
Died
8 27%
Euthanised
1 3.3%
Not known
11 37%

Problems reported at the same time

20 67%
10 33%
9 30%
Weight loss
5 17%
Blood problems
4 13%
4 13%
Dehydration
4 13%

Age of the animals

Under 1 year
18
1–3 years
5
4–7 years
0
8–11 years
1
12+ years
1

About this medicine

Type: medicine.

Questions owners ask

Can Sulfadimethoxine cause loss of appetite in cats?
30 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 2 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).

Loss of appetite with similar medicines

All reported side effects of Sulfadimethoxine in cats · Medicines most reported with loss of appetite