Lethargy after Enrofloxacin (Baytril) in dogs

The FDA has received 795 reports of lethargy in dogs after Enrofloxacin. That is 21% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.

795Reports
70%Marked serious
21%Recovered
31%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
125 21%
1–2 days
110 19%
3–7 days
99 17%
1–4 weeks
111 19%
Over a month
146 25%

How the animals did

Recovered
154 19%
Recovered with lasting effects
9 1.1%
Still unwell when reported
166 21%
Died
105 13%
Euthanised
141 18%
Not known
220 28%

Problems reported at the same time

Age of the animals

Under 1 year
47
1–3 years
141
4–7 years
221
8–11 years
230
12+ years
143

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 lethargy in dogs?
795 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).

Lethargy with similar medicines

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