Breathing problems after Cephalexin in dogs

139 reports to the FDA describe breathing problems in dogs given Cephalexin. That is 5.2% of all reports for this medicine, compared with 2.7% across reports for all dog medicines, so it is reported unusually often with this medicine.

139Reports
68%Marked serious
26%Recovered
32%Died or euthanised
9 daysTypical onset
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How soon it started

Same day
23 21%
1–2 days
19 18%
3–7 days
11 10%
1–4 weeks
23 21%
Over a month
31 29%

How the animals did

Recovered
32 23%
Recovered with lasting effects
4 2.9%
Still unwell when reported
40 29%
Died
24 17%
Euthanised
20 14%
Not known
19 14%

Problems reported at the same time

Age of the animals

Under 1 year
7
1–3 years
30
4–7 years
39
8–11 years
50
12+ years
12

About this medicine

Type: medicine.

Questions owners ask

Can Cephalexin cause breathing problems in dogs?
139 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 9 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).

Breathing problems with similar medicines

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