Acepromazine side effects in horses

62 reports sent to the FDA between 1995 and 2026 involve Acepromazine in horses. The most reported problems were swelling, restlessness or agitation, collapse. 40% were marked serious.

62Reports
40%Marked serious
47%Only medicine involved
42%Recovered
26%Died or euthanised
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

About this medicine

Type: medicine.

Most reported side effects

Swelling
9 15%
Restlessness or agitation
7 11%
Collapse
7 11%
Wobbliness (ataxia)
7 11%
Seizures
7 11%
Loss of appetite
7 11%
Penile prolapse
6 9.7%
Colic
6 9.7%
Allergic reaction
5 8.1%
Underdose
5 8.1%
Lateral recumbency
4 6.5%
Behaviour change
4 6.5%
Fever
4 6.5%
Priapism
3 4.8%
Breathing problems
3 4.8%

Share = percentage of this medicine's reports that mention the problem. One report can list several problems.

Reports that it didn't work

Some reports are about the medicine not working (for example a horse still getting fleas or heartworm), not about a side effect.

Didn't work as expected
13 21%

How soon problems started

Same day
26 76%
1–2 days
6 18%
3–7 days
0 0.0%
1–4 weeks
2 5.9%
Over a month
0 0.0%

Time from the first dose to the first sign, where both dates were reported (34 reports).

How the animals did

Recovered
24 39%
Recovered with lasting effects
2 3.2%
Still unwell when reported
2 3.2%
Died
7 11%
Euthanised
9 15%
Not known
18 29%

Breeds named most often

Popular breeds appear more often because there are more of them.

Other medicines for horses