Liver problems after Amoxicillin in cats

31 reports to the FDA describe liver problems in cats given Amoxicillin. That is 6.0% of all reports for this medicine, compared with 2.8% across reports for all cat medicines, so it is reported unusually often with this medicine.

31Reports

55%Marked serious

0.0%Recovered

45%Died or euthanised

2 daysTypical onset

How soon it started

Same day

2 13%

1–2 days

7 44%

3–7 days

0 0.0%

1–4 weeks

5 31%

Over a month

2 13%

How the animals did

Still unwell when reported

6 19%

Died

9 29%

Euthanised

5 16%

Not known

11 35%

Problems reported at the same time

17 55%

15 48%

14 45%

14 45%

14 45%

9 29%

Blood problems

8 26%

Diarrhea

6 19%

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 liver problems in cats?: 31 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 2 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).

Liver problems with similar medicines

Liver problems after Cefovecin (Convenia) 621 reports · 7.2% of its reports
Liver problems after Amoxicillin + Clavulanate (Clavamox) 152 reports · 6.4% of its reports
Liver problems after Enrofloxacin (Baytril) 95 reports · 6.0% of its reports
Liver problems after Metronidazole 27 reports · 6.9% of its reports
Liver problems after Doxycycline 40 reports · 15% of its reports

All reported side effects of Amoxicillin in cats · Medicines most reported with liver problems