Vomiting after Cephalexin in dogs

The FDA has received 1,125 reports of vomiting in dogs after Cephalexin. That is 42% of all reports for this medicine, compared with 28% across reports for all dog medicines, so it is reported unusually often with this medicine.

1,125Reports
29%Marked serious
59%Recovered
8.7%Died or euthanised
1 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
407 44%
1–2 days
111 12%
3–7 days
88 9.4%
1–4 weeks
121 13%
Over a month
208 22%

How the animals did

Recovered
642 57%
Recovered with lasting effects
26 2.3%
Still unwell when reported
149 13%
Died
54 4.8%
Euthanised
44 3.9%
Not known
210 19%

Problems reported at the same time

Age of the animals

Under 1 year
132
1–3 years
335
4–7 years
342
8–11 years
213
12+ years
83

About this medicine

Type: medicine.

Questions owners ask

Can Cephalexin cause vomiting in dogs?
1,125 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 1 day 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).

Vomiting with similar medicines

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