Pneumonia after Enrofloxacin (Baytril) in dogs

The FDA has received 64 reports of pneumonia in dogs after Enrofloxacin. That is 1.7% of all reports for this medicine, compared with 0.1% across reports for all dog medicines, so it is reported unusually often with this medicine.

64Reports
92%Marked serious
7.8%Recovered
42%Died or euthanised
29 daysTypical onset
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How soon it started

Same day
8 15%
1–2 days
5 9.4%
3–7 days
7 13%
1–4 weeks
7 13%
Over a month
26 49%

How the animals did

Recovered
4 6.3%
Recovered with lasting effects
1 1.6%
Still unwell when reported
23 36%
Died
17 27%
Euthanised
10 16%
Not known
9 14%

Problems reported at the same time

Age of the animals

Under 1 year
6
1–3 years
10
4–7 years
11
8–11 years
24
12+ years
13

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 pneumonia in dogs?
64 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 29 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).

Pneumonia with similar medicines

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