Breathing problems after Ampicillin in cats

49 reports to the FDA describe breathing problems in cats given Ampicillin. That is 16% of all reports for this medicine, compared with 4.7% across reports for all cat medicines, so it is reported unusually often with this medicine.

49Reports
96%Marked serious
12%Recovered
47%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
20 49%
1–2 days
11 27%
3–7 days
5 12%
1–4 weeks
2 4.9%
Over a month
3 7.3%

How the animals did

Recovered
6 12%
Still unwell when reported
13 27%
Died
11 22%
Euthanised
12 24%
Not known
7 14%

Problems reported at the same time

Age of the animals

Under 1 year
7
1–3 years
6
4–7 years
14
8–11 years
10
12+ years
11

About this medicine

Type: medicine.

Questions owners ask

Can Ampicillin cause breathing problems in cats?
49 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).

Breathing problems with similar medicines

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