Hair loss after Neomycin in cats

The FDA has received 26 reports of hair loss in cats after Neomycin. That is 34% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

26Reports
58%Marked serious
19%Recovered
12%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
5 23%
1–2 days
5 23%
3–7 days
8 36%
1–4 weeks
2 9.1%
Over a month
2 9.1%

How the animals did

Recovered
5 19%
Still unwell when reported
12 46%
Died
1 3.8%
Euthanised
2 7.7%
Not known
6 23%

Problems reported at the same time

Application site reaction
15 58%
Itching
10 38%
Skin rash or irritation
5 19%
Skin scab
5 19%
Loss of appetite
4 15%
Didn't work as expected
4 15%
Death
3 12%
Lethargy
3 12%

Age of the animals

Under 1 year
1
1–3 years
5
4–7 years
6
8–11 years
9
12+ years
5

About this medicine

Type: medicine.

Questions owners ask

Can Neomycin cause hair loss in cats?
26 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 3 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).

Hair loss with similar medicines

All reported side effects of Neomycin in cats · Medicines most reported with hair loss