Decreased haematocrit after Enrofloxacin (Baytril) in dogs

40 reports to the FDA describe decreased haematocrit in dogs given Enrofloxacin. That is 1.1% 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.

40Reports
88%Marked serious
13%Recovered
43%Died or euthanised
21 daysTypical onset
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How soon it started

Same day
1 2.9%
1–2 days
5 15%
3–7 days
4 12%
1–4 weeks
10 29%
Over a month
14 41%

How the animals did

Recovered
5 13%
Still unwell when reported
13 33%
Died
5 13%
Euthanised
12 30%
Not known
5 13%

Problems reported at the same time

Age of the animals

Under 1 year
9
1–3 years
5
4–7 years
13
8–11 years
8
12+ years
5

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 decreased haematocrit in dogs?
40 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 21 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).

Decreased haematocrit with similar medicines

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