Diarrhea after Amoxicillin in dogs

177 reports to the FDA describe diarrhea in dogs given Amoxicillin. That is 13% of all reports for this medicine, compared with 8.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

177Reports

59%Marked serious

16%Recovered

22%Died or euthanised

7 daysTypical onset

How soon it started

Same day

22 16%

1–2 days

24 18%

3–7 days

23 17%

1–4 weeks

32 24%

Over a month

34 25%

How the animals did

Recovered

27 15%

Recovered with lasting effects

1 0.6%

Still unwell when reported

68 38%

Died

11 6.2%

Euthanised

28 16%

Not known

42 24%

Problems reported at the same time

93 53%

88 50%

68 38%

60 34%

38 21%

33 19%

29 16%

Abnormal ultrasound finding

28 16%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Amoxicillin treats bacterial infections.

Questions owners ask

Can Amoxicillin cause diarrhea in dogs?: 177 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 7 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).

Diarrhea with similar medicines

Diarrhea after Amoxicillin + Clavulanate (Clavamox) 505 reports · 9.4% of its reports
Diarrhea after Doxycycline 301 reports · 7.5% of its reports
Diarrhea after Cefovecin (Convenia) 377 reports · 9.9% of its reports
Diarrhea after Enrofloxacin (Baytril) 365 reports · 9.7% of its reports
Diarrhea after Metronidazole 1,114 reports · 36% of its reports

All reported side effects of Amoxicillin in dogs · Medicines most reported with diarrhea