Liver problems after Enrofloxacin (Baytril) in dogs

The FDA has received 547 reports of liver problems in dogs after Enrofloxacin. That is 15% of all reports for this medicine, compared with 4.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

547Reports
77%Marked serious
8.4%Recovered
44%Died or euthanised
8 daysTypical onset
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How soon it started

Same day
62 15%
1–2 days
64 15%
3–7 days
78 18%
1–4 weeks
99 23%
Over a month
120 28%

How the animals did

Recovered
39 7.1%
Recovered with lasting effects
7 1.3%
Still unwell when reported
167 31%
Died
103 19%
Euthanised
136 25%
Not known
95 17%

Problems reported at the same time

Age of the animals

Under 1 year
26
1–3 years
80
4–7 years
155
8–11 years
188
12+ years
95

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 liver problems in dogs?
547 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 8 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

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