Drug profile

The FDA adverse-event record for Acepromazine Maleate

1,038 FDA reports name Acepromazine Maleate, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#175 of 2,679
by report volume (all drugs)
1,038
adverse-event reports
21.1%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Acepromazine Maleate ranks #175 of 2679 by total reports (1,038) and #224 of 1130 by death-coded share (21.1%). National dual: Milbemycin Oxime + Spinosad is #1 of 2679 drugs by total adverse-event reports (149,624) at death-coded-share rank 965 of 1130 drugs with at least 50 reports (2.3%); separately, Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) is #1 highest death-coded share at 97.8% (report rank #821).

149,624
Milbemycin Oxime + Spinosad reports (#1)
97.8%
Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) death share (#1)
#175
This drug, reports of 2679
#224
This drug, death share of 1130

Report volume reflects how common a breed or drug is and how often owners and vets file — not actual risk. Death-coded share ranks are limited to entries with enough reports to be meaningful. The two maps do not agree at #1.

Release-over-release change

What changed in the latest FDA data snapshot

PlainBreed reconstructed the prior snapshot from dated openFDA partitions through 2025 Q4, then compared it with the 2026-07-27 openFDA export. Acepromazine Maleate has 1,038 reports now versus 1,036 in that prior snapshot: 2 more (0.2%).

Report change
+2
Death-coded reports
+0
Death-coded share
−0.0 pts

This compares reported-event counts in two source snapshots. It does not establish a change in real-world risk, product safety, or disease incidence.

Subscribe to Acepromazine Maleate changes

Signature read: death-coded report count at 219 is the most distinctive stamp on Acepromazine Maleate's FDA AER row.

Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
1,038
Total Reports
219
Deaths Reported
21.1%
Death-coded share of reports

Active Ingredients

Acepromazine Maleate

Administration Routes

UnknownIntramuscularOralSubcutaneousIntravenousIntraperitonealOphthalmicParenteralTransdermalOther

Species Affected

Dog 734
Cat 194
Unknown 62
Horse 31
Human 5
Cattle 5
Mouse 3
Rabbit 2
Pig 1
Other Rodents 1

Most Affected Breeds

Domestic Shorthair 108
Retriever - Labrador 100
Dog (unknown) 73
Unknown 67
Chihuahua 39
Crossbred Canine/dog 28
Shepherd Dog - German 27
Terrier - Bull - American Pit 22
Retriever - Golden 21
Cat (other) 19

Most Reported Reactions

Vomiting 137
Lethargy (see also Central nervous system depression in 'Neurological') 117
Death 109
Death by euthanasia 80
Anorexia 75
Diarrhoea 56
Other abnormal test result NOS 55
Lack of efficacy - NOS 53
Seizure NOS 52
Bradycardia 50
Elevated alanine aminotransferase (ALT) 49
Cardiac arrest 47

Outcome Breakdown

Recovered/Normal
328 (35.0%)
Ongoing
278 (29.6%)
Died
124 (13.2%)
Outcome Unknown
110 (11.7%)
Euthanized
96 (10.2%)
Recovered with Sequela
2 (0.2%)

Acepromazine Maleate: high death-coded share in the FDA AER row

Read these counts as reporting volume, not risk: per our methodology, a widely-prescribed drug will rack up more raw FDA reports in a given year than a rarely-used one at an identical true rate, so we recommend comparing within similar-exposure products rather than across the full 2025 catalog.

High-volume nationwide drug peers

Two openFDA-derived peer sets for Acepromazine Maleate, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

Similar death-coded share

Nearest other drugs by death-coded share (21.1% here), distinct from the volume row.

What to do with this drug

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Acepromazine Maleate (#175 of 2,679 by report volume); death-coded 21.1%. PlainBreed drug row · death-coded report count stamp 219 · vintage 2025.

Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →