Neutrophilia after Enrofloxacin (Baytril) in dogs

156 reports to the FDA describe neutrophilia in dogs given Enrofloxacin. That is 4.1% of all reports for this medicine, compared with 0.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

156Reports
84%Marked serious
12%Recovered
40%Died or euthanised
7 daysTypical onset
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How soon it started

Same day
25 20%
1–2 days
16 13%
3–7 days
26 20%
1–4 weeks
33 26%
Over a month
28 22%

How the animals did

Recovered
18 12%
Recovered with lasting effects
1 0.6%
Still unwell when reported
47 30%
Died
24 15%
Euthanised
38 24%
Not known
28 18%

Problems reported at the same time

Age of the animals

Under 1 year
15
1–3 years
31
4–7 years
38
8–11 years
49
12+ years
23

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 neutrophilia in dogs?
156 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 7 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).

Neutrophilia with similar medicines

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