Kidney problems after Ampicillin in cats

60 reports to the FDA describe kidney problems in cats given Ampicillin. That is 20% of all reports for this medicine, compared with 4.5% across reports for all cat medicines, so it is reported unusually often with this medicine.

60Reports
85%Marked serious
6.7%Recovered
47%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
15 30%
1–2 days
12 24%
3–7 days
5 10%
1–4 weeks
8 16%
Over a month
10 20%

How the animals did

Recovered
3 5.0%
Recovered with lasting effects
1 1.7%
Still unwell when reported
18 30%
Died
2 3.3%
Euthanised
26 43%
Not known
10 17%

Problems reported at the same time

Age of the animals

Under 1 year
4
1–3 years
7
4–7 years
17
8–11 years
15
12+ years
17

About this medicine

Type: medicine.

Questions owners ask

Can Ampicillin cause kidney problems in cats?
60 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 2 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).

Kidney problems with similar medicines

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