Loose stool after Cephalexin in dogs

40 reports to the FDA describe loose stool in dogs given Cephalexin. That is 1.5% of all reports for this medicine, compared with 0.9% across reports for all dog medicines, so it is reported unusually often with this medicine.

40Reports
48%Marked serious
18%Recovered
20%Died or euthanised
10 daysTypical onset
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How soon it started

Same day
6 21%
1–2 days
1 3.6%
3–7 days
7 25%
1–4 weeks
5 18%
Over a month
9 32%

How the animals did

Recovered
5 13%
Recovered with lasting effects
2 5.0%
Still unwell when reported
11 28%
Died
6 15%
Euthanised
2 5.0%
Not known
14 35%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
5
4–7 years
15
8–11 years
12
12+ years
3

About this medicine

Type: medicine.

Questions owners ask

Can Cephalexin cause loose stool in dogs?
40 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).

Loose stool with similar medicines

All reported side effects of Cephalexin in dogs · Medicines most reported with loose stool