Allergic reaction after Xylazine in horses

30 reports to the FDA describe allergic reaction in horses given Xylazine. That is 6.5% of all reports for this medicine, compared with 7.5% across reports for all horse medicines.

30Reports
53%Marked serious
37%Recovered
23%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
14 74%
1–2 days
4 21%
3–7 days
0 0.0%
1–4 weeks
0 0.0%
Over a month
1 5.3%

How the animals did

Recovered
11 37%
Still unwell when reported
2 6.7%
Died
5 17%
Euthanised
2 6.7%
Not known
10 33%

Problems reported at the same time

7 23%
Pale mucous membrane
7 23%
Swelling
3 10%
Hyperhidrosis
3 10%
2 6.7%

Age of the animals

Under 1 year
1
1–3 years
5
4–7 years
5
8–11 years
2
12+ years
5

About this medicine

Type: medicine.

Questions owners ask

Can Xylazine cause allergic reaction in horses?
30 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 the same day 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).

Allergic reaction with similar medicines

All reported side effects of Xylazine in horses · Medicines most reported with allergic reaction