Breathing problems after Amoxicillin in cats

36 reports to the FDA describe breathing problems in cats given Amoxicillin. That is 7.0% of all reports for this medicine, compared with 4.7% across reports for all cat medicines.

36Reports

58%Marked serious

14%Recovered

28%Died or euthanised

2 daysTypical onset

How soon it started

Same day

7 27%

1–2 days

8 31%

3–7 days

4 15%

1–4 weeks

6 23%

Over a month

1 3.8%

How the animals did

Recovered

5 14%

Still unwell when reported

8 22%

Died

7 19%

Euthanised

3 8.3%

Not known

13 36%

Problems reported at the same time

10 28%

10 28%

9 25%

8 22%

7 19%

Increased respiratory rate

5 14%

Hypothermia

5 14%

Unresponsive

4 11%

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 breathing problems in cats?: 36 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).

Breathing problems with similar medicines

Breathing problems after Cefovecin (Convenia) 739 reports · 8.5% of its reports
Breathing problems after Amoxicillin + Clavulanate (Clavamox) 134 reports · 5.6% of its reports
Breathing problems after Enrofloxacin (Baytril) 45 reports · 2.8% of its reports
Breathing problems after Metronidazole 31 reports · 7.9% of its reports
Breathing problems after Doxycycline 24 reports · 9.3% of its reports

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