Diarrhea after Sulfadimethoxine in cats

The FDA has received 50 reports of diarrhea in cats after Sulfadimethoxine. That is 16% of all reports for this medicine, compared with 5.1% across reports for all cat medicines, so it is reported unusually often with this medicine.

50Reports
24%Marked serious
8.0%Recovered
18%Died or euthanised
2 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
5 24%
1–2 days
6 29%
3–7 days
2 9.5%
1–4 weeks
6 29%
Over a month
2 9.5%

How the animals did

Recovered
4 8.0%
Still unwell when reported
6 12%
Died
8 16%
Euthanised
1 2.0%
Not known
31 62%

Problems reported at the same time

15 30%
11 22%
9 18%
Weight loss
6 12%
Drooling
4 8.0%
Dehydration
4 8.0%

Age of the animals

Under 1 year
28
1–3 years
5
4–7 years
3
8–11 years
0
12+ years
3

About this medicine

Type: medicine.

Questions owners ask

Can Sulfadimethoxine cause diarrhea in cats?
50 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).

Diarrhea with similar medicines

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