Hair loss after Spinetoram in cats

The FDA has received 47 reports of hair loss in cats after Spinetoram. That is 18% of all reports for this medicine, compared with 14% across reports for all cat medicines.

47Reports
19%Marked serious
21%Recovered
2.1%Died or euthanised
41 daysTypical onset
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How soon it started

Same day
2 9.5%
1–2 days
0 0.0%
3–7 days
3 14%
1–4 weeks
4 19%
Over a month
12 57%

How the animals did

Recovered
6 13%
Recovered with lasting effects
4 8.5%
Still unwell when reported
11 23%
Died
1 2.1%
Not known
25 53%

Problems reported at the same time

11 23%
Didn't stop worms
5 11%
4 8.5%
Skin rash or irritation
4 8.5%
Skin redness
4 8.5%
Restlessness or agitation
3 6.4%
Skin scab
3 6.4%

Age of the animals

Under 1 year
0
1–3 years
4
4–7 years
15
8–11 years
16
12+ years
12

About this medicine

Type: medicine.

Questions owners ask

Can Spinetoram cause hair loss in cats?
47 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 41 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 Spinetoram in cats · Medicines most reported with hair loss