Loss of appetite after Cephalexin in dogs

The FDA has received 404 reports of loss of appetite in dogs after Cephalexin. That is 15% of all reports for this medicine, compared with 8.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

404Reports
59%Marked serious
21%Recovered
28%Died or euthanised
6 daysTypical onset
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How soon it started

Same day
61 18%
1–2 days
61 18%
3–7 days
66 19%
1–4 weeks
73 22%
Over a month
78 23%

How the animals did

Recovered
72 18%
Recovered with lasting effects
14 3.5%
Still unwell when reported
134 33%
Died
53 13%
Euthanised
59 15%
Not known
72 18%

Problems reported at the same time

Age of the animals

Under 1 year
17
1–3 years
76
4–7 years
139
8–11 years
119
12+ years
50

About this medicine

Type: medicine.

Questions owners ask

Can Cephalexin cause loss of appetite in dogs?
404 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 6 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 Cephalexin in dogs · Medicines most reported with loss of appetite