Hyperkalaemia after Enrofloxacin (Baytril) in dogs

31 reports to the FDA describe hyperkalaemia in dogs given Enrofloxacin. That is 0.8% of all reports for this medicine, compared with 0.3% across reports for all dog medicines, so it is reported unusually often with this medicine.

31Reports

94%Marked serious

3.2%Recovered

71%Died or euthanised

38 daysTypical onset

How soon it started

Same day

1 4.5%

1–2 days

2 9.1%

3–7 days

4 18%

1–4 weeks

2 9.1%

Over a month

13 59%

How the animals did

Recovered

1 3.2%

Still unwell when reported

2 6.5%

Died

9 29%

Euthanised

13 42%

Not known

6 19%

Problems reported at the same time

22 71%

22 71%

22 71%

20 65%

15 48%

12 39%

11 35%

11 35%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Enrofloxacin treats bacterial infections.

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

Questions owners ask

Can Enrofloxacin cause hyperkalaemia in dogs?: 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 38 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).

Hyperkalaemia with similar medicines

Hyperkalaemia after Amoxicillin + Clavulanate (Clavamox) 54 reports · 1.0% of its reports
Hyperkalaemia after Metronidazole 38 reports · 1.2% of its reports
Hyperkalaemia after Amoxicillin 23 reports · 1.7% of its reports

All reported side effects of Enrofloxacin in dogs · Medicines most reported with hyperkalaemia