Colic after Oxybendazole in horses

The FDA has received 54 reports of colic in horses after Oxybendazole. That is 49% of all reports for this medicine, compared with 4.2% across reports for all horse medicines, so it is reported unusually often with this medicine.

54Reports
37%Marked serious
74%Recovered
7.4%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
15 28%
1–2 days
38 70%
3–7 days
0 0.0%
1–4 weeks
1 1.9%
Over a month
0 0.0%

How the animals did

Recovered
39 72%
Recovered with lasting effects
1 1.9%
Still unwell when reported
6 11%
Died
1 1.9%
Euthanised
3 5.6%
Not known
4 7.4%

Problems reported at the same time

27 50%
15 28%
Loose stool
7 13%
Tachycardia
6 11%
Breathing problems
4 7.4%
Death
4 7.4%
Fever
3 5.6%

Age of the animals

Under 1 year
1
1–3 years
6
4–7 years
10
8–11 years
8
12+ years
18

About this medicine

Type: medicine.

Questions owners ask

Can Oxybendazole cause colic in horses?
54 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 1 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).

Colic with similar medicines

All reported side effects of Oxybendazole in horses · Medicines most reported with colic