Vomiting after Ampicillin in cats

49 reports to the FDA describe vomiting in cats given Ampicillin. That is 16% of all reports for this medicine, compared with 18% across reports for all cat medicines.

49Reports
78%Marked serious
18%Recovered
35%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
11 27%
1–2 days
14 34%
3–7 days
6 15%
1–4 weeks
4 9.8%
Over a month
6 15%

How the animals did

Recovered
7 14%
Recovered with lasting effects
2 4.1%
Still unwell when reported
13 27%
Died
5 10%
Euthanised
12 24%
Not known
10 20%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
5
4–7 years
7
8–11 years
18
12+ years
13

About this medicine

Type: medicine.

Questions owners ask

Can Ampicillin cause vomiting 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).

Vomiting with similar medicines

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