Didn't work as expected after Amoxicillin in dogs

145 reports to the FDA describe didn't work as expected in dogs given Amoxicillin. That is 11% of all reports for this medicine, compared with 13% across reports for all dog medicines.

145Reports
47%Marked serious
9.0%Recovered
16%Died or euthanised
25 daysTypical onset
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How soon it started

Same day
12 14%
1–2 days
8 9.1%
3–7 days
9 10%
1–4 weeks
20 23%
Over a month
39 44%

How the animals did

Recovered
11 7.6%
Recovered with lasting effects
2 1.4%
Still unwell when reported
59 41%
Died
9 6.2%
Euthanised
14 9.7%
Not known
50 34%

Problems reported at the same time

Age of the animals

Under 1 year
22
1–3 years
19
4–7 years
30
8–11 years
40
12+ years
29

About this medicine

Amoxicillin treats bacterial infections.

Questions owners ask

Can Amoxicillin cause didn't work as expected in dogs?
145 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 25 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).

Didn't work as expected with similar medicines

All reported side effects of Amoxicillin in dogs · Medicines most reported with didn't work as expected