Blood problems after Ampicillin in dogs

184 reports to the FDA describe blood problems in dogs given Ampicillin. That is 19% of all reports for this medicine, compared with 1.8% across reports for all dog medicines, so it is reported unusually often with this medicine.

184Reports
83%Marked serious
6.5%Recovered
58%Died or euthanised
6 daysTypical onset
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How soon it started

Same day
26 17%
1–2 days
25 16%
3–7 days
31 20%
1–4 weeks
36 24%
Over a month
34 22%

How the animals did

Recovered
12 6.5%
Still unwell when reported
54 29%
Died
32 17%
Euthanised
74 40%
Not known
12 6.5%

Problems reported at the same time

Age of the animals

Under 1 year
36
1–3 years
26
4–7 years
51
8–11 years
43
12+ years
26

About this medicine

Type: medicine.

Questions owners ask

Can Ampicillin cause blood problems in dogs?
184 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 6 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).

Blood problems with similar medicines

All reported side effects of Ampicillin in dogs · Medicines most reported with blood problems