Furosemide side effects in cats

303 reports sent to the FDA between 1995 and 2026 involve Furosemide in cats. The most reported problems were loss of appetite, breathing problems, lethargy. 64% were marked serious, and where it was recorded, signs eased after stopping the medicine in 50% of cases.

303Reports
64%Marked serious
9.6%Only medicine involved
17%Recovered
37%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

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 cat still getting fleas or heartworm), not about a side effect.

Didn't stop fleas
2 0.7%
Didn't prevent heartworm
1 0.3%

How soon problems started

Same day
76 33%
1–2 days
35 15%
3–7 days
26 11%
1–4 weeks
40 17%
Over a month
56 24%

Time from the first dose to the first sign, where both dates were reported (233 reports).

How the animals did

Recovered
51 17%
Still unwell when reported
48 16%
Died
58 19%
Euthanised
53 17%
Not known
93 31%

Breeds named most often

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

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