Death after Ampicillin in cats

The FDA has received 103 reports of death in cats after Ampicillin. That is 34% of all reports for this medicine, compared with 8.9% across reports for all cat medicines, so it is reported unusually often with this medicine.

103Reports
87%Marked serious
0.0%Recovered
100%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
27 32%
1–2 days
29 35%
3–7 days
8 9.5%
1–4 weeks
11 13%
Over a month
9 11%

How the animals did

Died
43 42%
Euthanised
60 58%

Problems reported at the same time

Age of the animals

Under 1 year
15
1–3 years
8
4–7 years
27
8–11 years
25
12+ years
27

About this medicine

Type: medicine.

Questions owners ask

Can Ampicillin cause death in cats?
103 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).

Death with similar medicines

All reported side effects of Ampicillin in cats · Medicines most reported with death