Death after Cefazolin in dogs

The FDA has received 161 reports of death in dogs after Cefazolin. That is 38% of all reports for this medicine, compared with 5.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

161Reports
98%Marked serious
0.0%Recovered
100%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
29 21%
1–2 days
29 21%
3–7 days
31 22%
1–4 weeks
20 14%
Over a month
29 21%

How the animals did

Died
85 53%
Euthanised
76 47%

Problems reported at the same time

Age of the animals

Under 1 year
27
1–3 years
20
4–7 years
42
8–11 years
55
12+ years
12

About this medicine

Type: medicine.

Questions owners ask

Can Cefazolin cause death in dogs?
161 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 4 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).

Death with similar medicines

All reported side effects of Cefazolin in dogs · Medicines most reported with death