Lasix side effects in dogs

88 reports sent to the FDA between 2012 and 2025 involve Lasix in dogs. The most reported problems were loss of appetite, lethargy, diarrhea. 77% were marked serious.

88Reports
77%Marked serious
0.0%Only medicine involved
14%Recovered
35%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

Lethargy
19 22%
Diarrhea
15 17%
Vomiting
14 16%
Seizures
13 15%
Breathing problems
12 14%
Kidney problems
11 13%
Weakness
10 11%
Liver problems
9 10%
Collapse
8 9.1%
Cough
7 8.0%
Weight loss
6 6.8%
Vocalising
6 6.8%
Swelling
6 6.8%
Abnormal radiograph finding
6 6.8%

Share = percentage of this medicine's reports that mention the problem. One report can list several problems.

Reports that it didn't work

Some reports are about the medicine not working (for example a dog still getting fleas or heartworm), not about a side effect.

Didn't work as expected
8 9.1%
Didn't prevent heartworm
2 2.3%
Didn't stop fleas
1 1.1%
Didn't stop ticks
1 1.1%

How soon problems started

Same day
10 15%
1–2 days
4 6.2%
3–7 days
7 11%
1–4 weeks
15 23%
Over a month
29 45%

Time from the first dose to the first sign, where both dates were reported (65 reports).

How the animals did

Recovered
12 14%
Still unwell when reported
30 34%
Died
15 17%
Euthanised
16 18%
Not known
15 17%

Breeds named most often

Popular breeds appear more often because there are more of them.

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