Excessive urination after Amoxicillin + Clavulanate (Clavamox) in cats

34 reports to the FDA describe excessive urination in cats given Amoxicillin + Clavulanate. That is 1.4% of all reports for this medicine, compared with 0.7% across reports for all cat medicines, so it is reported unusually often with this medicine.

34Reports

50%Marked serious

0.0%Recovered

26%Died or euthanised

3 daysTypical onset

How soon it started

Same day

7 32%

1–2 days

1 4.5%

3–7 days

5 23%

1–4 weeks

3 14%

Over a month

6 27%

How the animals did

Still unwell when reported

11 32%

Died

4 12%

Euthanised

5 15%

Not known

14 41%

Problems reported at the same time

27 79%

12 35%

12 35%

11 32%

10 29%

9 26%

8 24%

8 24%

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.

Products with this combination include Clavamox. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Amoxicillin + Clavulanate cause excessive urination in cats?: 34 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 3 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).

Excessive urination with similar medicines

Excessive urination after Cefovecin (Convenia) 78 reports · 0.9% of its reports

All reported side effects of Amoxicillin + Clavulanate in cats · Medicines most reported with excessive urination