Breathing problems after Xylazine in horses

The FDA has received 35 reports of breathing problems in horses after Xylazine. That is 7.5% of all reports for this medicine, compared with 3.4% across reports for all horse medicines, so it is reported unusually often with this medicine.

35Reports
51%Marked serious
26%Recovered
43%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
10 77%
1–2 days
2 15%
3–7 days
1 7.7%
1–4 weeks
0 0.0%
Over a month
0 0.0%

How the animals did

Recovered
9 26%
Still unwell when reported
1 2.9%
Died
11 31%
Euthanised
4 11%
Not known
10 29%

Problems reported at the same time

13 37%
Tachycardia
7 20%
Recumbency
5 14%
Swelling
4 11%

Age of the animals

Under 1 year
1
1–3 years
9
4–7 years
0
8–11 years
6
12+ years
15

About this medicine

Type: medicine.

Questions owners ask

Can Xylazine cause breathing problems in horses?
35 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).

Breathing problems with similar medicines

All reported side effects of Xylazine in horses · Medicines most reported with breathing problems