Hyperphosphataemia after Enrofloxacin (Baytril) in dogs

79 reports to the FDA describe hyperphosphataemia in dogs given Enrofloxacin. That is 2.1% 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.

79Reports
86%Marked serious
11%Recovered
65%Died or euthanised
15 daysTypical onset
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How soon it started

Same day
4 6.8%
1–2 days
13 22%
3–7 days
9 15%
1–4 weeks
14 24%
Over a month
19 32%

How the animals did

Recovered
9 11%
Still unwell when reported
14 18%
Died
19 24%
Euthanised
32 41%
Not known
5 6.3%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
14
4–7 years
18
8–11 years
26
12+ years
16

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 hyperphosphataemia in dogs?
79 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 15 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).

Hyperphosphataemia with similar medicines

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