Leucocytosis after Furosemide in dogs

57 reports to the FDA describe leucocytosis in dogs given Furosemide. That is 3.8% of all reports for this medicine, compared with 1.0% across reports for all dog medicines, so it is reported unusually often with this medicine.

57Reports
91%Marked serious
5.3%Recovered
63%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
8 19%
1–2 days
10 23%
3–7 days
7 16%
1–4 weeks
4 9.3%
Over a month
14 33%

How the animals did

Recovered
2 3.5%
Recovered with lasting effects
1 1.8%
Still unwell when reported
12 21%
Died
20 35%
Euthanised
16 28%
Not known
6 11%

Problems reported at the same time

Age of the animals

Under 1 year
2
1–3 years
2
4–7 years
10
8–11 years
17
12+ years
24

About this medicine

Type: medicine.

Questions owners ask

Can Furosemide cause leucocytosis in dogs?
57 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 4 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).

Leucocytosis with similar medicines

All reported side effects of Furosemide in dogs · Medicines most reported with leucocytosis