Loss of appetite after Amoxicillin in cats

121 reports to the FDA describe loss of appetite in cats given Amoxicillin. That is 24% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

121Reports

48%Marked serious

12%Recovered

30%Died or euthanised

4 daysTypical onset

How soon it started

Same day

16 21%

1–2 days

15 19%

3–7 days

15 19%

1–4 weeks

26 34%

Over a month

5 6.5%

How the animals did

Recovered

15 12%

Still unwell when reported

16 13%

Died

27 22%

Euthanised

9 7.4%

Not known

54 45%

Problems reported at the same time

56 46%

47 39%

33 27%

28 23%

17 14%

Dehydration

16 13%

Diarrhea

16 13%

Fever

14 12%

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 loss of appetite in cats?: 121 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 4 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).

Loss of appetite with similar medicines

Loss of appetite after Cefovecin (Convenia) 2,549 reports · 29% of its reports
Loss of appetite after Amoxicillin + Clavulanate (Clavamox) 567 reports · 24% of its reports
Loss of appetite after Enrofloxacin (Baytril) 228 reports · 14% of its reports
Loss of appetite after Metronidazole 103 reports · 26% of its reports
Loss of appetite after Doxycycline 86 reports · 33% of its reports

All reported side effects of Amoxicillin in cats · Medicines most reported with loss of appetite