Lethargy after Itraconazole in cats

87 reports to the FDA describe lethargy in cats given Itraconazole. That is 20% of all reports for this medicine, compared with 14% across reports for all cat medicines.

87Reports
66%Marked serious
32%Recovered
6.9%Died or euthanised
14 daysTypical onset
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How soon it started

Same day
11 15%
1–2 days
8 11%
3–7 days
9 12%
1–4 weeks
27 36%
Over a month
19 26%

How the animals did

Recovered
28 32%
Still unwell when reported
24 28%
Died
2 2.3%
Euthanised
4 4.6%
Not known
29 33%

Problems reported at the same time

Age of the animals

Under 1 year
26
1–3 years
22
4–7 years
15
8–11 years
9
12+ years
12

About this medicine

Type: medicine.

Questions owners ask

Can Itraconazole cause lethargy in cats?
87 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 14 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 Itraconazole in cats · Medicines most reported with lethargy