Ketoconazole side effects in dogs

2,256 reports sent to the FDA between 1998 and 2026 involve Ketoconazole in dogs. The most reported problems were vomiting, lethargy, loss of appetite. 53% were marked serious, and where it was recorded, signs eased after stopping the medicine in 56% of cases.

2,256Reports
53%Marked serious
1.0%Only medicine involved
28%Recovered
5.3%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 dog still getting fleas or heartworm), not about a side effect.

Didn't prevent heartworm
18 0.8%
Didn't stop worms
15 0.7%
Didn't stop fleas
14 0.6%
Didn't stop ticks
1 0.0%

How soon problems started

Same day
280 17%
1–2 days
193 11%
3–7 days
216 13%
1–4 weeks
387 23%
Over a month
603 36%

Time from the first dose to the first sign, where both dates were reported (1,679 reports).

How the animals did

Recovered
569 25%
Recovered with lasting effects
69 3.1%
Still unwell when reported
840 37%
Died
59 2.6%
Euthanised
61 2.7%
Not known
658 29%

Breeds named most often

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

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