Weakness after Ampicillin in dogs

82 reports to the FDA describe weakness in dogs given Ampicillin. That is 8.4% of all reports for this medicine, compared with 1.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

82Reports
87%Marked serious
8.5%Recovered
62%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
16 24%
1–2 days
16 24%
3–7 days
9 13%
1–4 weeks
12 18%
Over a month
14 21%

How the animals did

Recovered
7 8.5%
Still unwell when reported
11 13%
Died
20 24%
Euthanised
31 38%
Not known
13 16%

Problems reported at the same time

Age of the animals

Under 1 year
14
1–3 years
10
4–7 years
16
8–11 years
19
12+ years
20

About this medicine

Type: medicine.

Questions owners ask

Can Ampicillin cause weakness in dogs?
82 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 3 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).

Weakness with similar medicines

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