Heart murmur after Furosemide in dogs

34 reports to the FDA describe heart murmur in dogs given Furosemide. That is 2.2% of all reports for this medicine, compared with 0.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

34Reports
88%Marked serious
5.9%Recovered
44%Died or euthanised
150 daysTypical onset
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How soon it started

Same day
2 11%
1–2 days
2 11%
3–7 days
1 5.6%
1–4 weeks
2 11%
Over a month
11 61%

How the animals did

Recovered
1 2.9%
Recovered with lasting effects
1 2.9%
Still unwell when reported
10 29%
Died
8 24%
Euthanised
7 21%
Not known
7 21%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
1
4–7 years
3
8–11 years
9
12+ years
19

About this medicine

Type: medicine.

Questions owners ask

Can Furosemide cause heart murmur in dogs?
34 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 150 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).

Heart murmur with similar medicines

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