Weight loss after Itraconazole in cats

The FDA has received 57 reports of weight loss in cats after Itraconazole. That is 13% of all reports for this medicine, compared with 4.6% across reports for all cat medicines, so it is reported unusually often with this medicine.

57Reports
81%Marked serious
19%Recovered
8.8%Died or euthanised
28 daysTypical onset
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How soon it started

Same day
3 6.1%
1–2 days
1 2.0%
3–7 days
4 8.2%
1–4 weeks
22 45%
Over a month
19 39%

How the animals did

Recovered
10 18%
Recovered with lasting effects
1 1.8%
Still unwell when reported
22 39%
Died
2 3.5%
Euthanised
3 5.3%
Not known
19 33%

Problems reported at the same time

27 47%
24 42%
Dehydration
11 19%
Kidney problems
7 12%
Nausea
5 8.8%

Age of the animals

Under 1 year
5
1–3 years
13
4–7 years
16
8–11 years
12
12+ years
9

About this medicine

Type: medicine.

Questions owners ask

Can Itraconazole cause weight loss in cats?
57 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 28 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).

Weight loss with similar medicines

All reported side effects of Itraconazole in cats · Medicines most reported with weight loss