Lethargy after Furosemide in dogs

324 reports to the FDA describe lethargy in dogs given Furosemide. That is 21% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.

324Reports
61%Marked serious
17%Recovered
33%Died or euthanised
8 daysTypical onset
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How soon it started

Same day
48 22%
1–2 days
36 16%
3–7 days
27 12%
1–4 weeks
34 15%
Over a month
78 35%

How the animals did

Recovered
53 16%
Recovered with lasting effects
3 0.9%
Still unwell when reported
74 23%
Died
54 17%
Euthanised
54 17%
Not known
86 27%

Problems reported at the same time

Age of the animals

Under 1 year
6
1–3 years
9
4–7 years
44
8–11 years
100
12+ years
157

About this medicine

Type: medicine.

Questions owners ask

Can Furosemide cause lethargy in dogs?
324 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 8 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).

Lethargy with similar medicines

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