Behaviour change after Enrofloxacin (Baytril) in dogs

196 reports to the FDA describe behaviour change in dogs given Enrofloxacin. That is 5.2% of all reports for this medicine, compared with 2.5% across reports for all dog medicines, so it is reported unusually often with this medicine.

196Reports
66%Marked serious
20%Recovered
20%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
33 22%
1–2 days
34 22%
3–7 days
27 18%
1–4 weeks
26 17%
Over a month
32 21%

How the animals did

Recovered
36 18%
Recovered with lasting effects
4 2.0%
Still unwell when reported
41 21%
Died
19 9.7%
Euthanised
20 10%
Not known
76 39%

Problems reported at the same time

Age of the animals

Under 1 year
8
1–3 years
28
4–7 years
57
8–11 years
48
12+ years
47

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 behaviour change in dogs?
196 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).

Behaviour change with similar medicines

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