Abnormal ultrasound finding after Enrofloxacin (Baytril) in dogs

The FDA has received 141 reports of abnormal ultrasound finding in dogs after Enrofloxacin. That is 3.7% of all reports for this medicine, compared with 0.5% across reports for all dog medicines, so it is reported unusually often with this medicine.

141Reports
84%Marked serious
7.8%Recovered
45%Died or euthanised
11 daysTypical onset
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How soon it started

Same day
16 14%
1–2 days
16 14%
3–7 days
18 16%
1–4 weeks
24 21%
Over a month
41 36%

How the animals did

Recovered
10 7.1%
Recovered with lasting effects
1 0.7%
Still unwell when reported
45 32%
Died
20 14%
Euthanised
44 31%
Not known
21 15%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
11
4–7 years
51
8–11 years
51
12+ years
27

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 abnormal ultrasound finding in dogs?
141 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 11 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).

Abnormal ultrasound finding with similar medicines

All reported side effects of Enrofloxacin in dogs · Medicines most reported with abnormal ultrasound finding