Drug profile

The FDA adverse-event record for Decoquinate

152 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Decoquinate. See the species affected, top reactions, and outcomes below.

152
adverse-event reports
23.7%
death-coded share
Cattle
most-reported species
38
Lack of efficacy (protozoa) - Coccidia - top reaction
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Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
152
Total Reports
36
Deaths Reported
23.7%
Death Rate

Active Ingredients

Decoquinate

Administration Routes

OralUnknown

Species Affected

Cattle 96
Unknown 30
Goat 7
Sheep 7
Chicken 4
Horse 3
Other Birds 2
Dog 2
Cat 1

Most Affected Breeds

Unknown 30
Holstein-Friesian also known as Holstein 26
Cattle (other) 26
Mixed (Cattle) 26
Sheep (unknown) 7
Jersey 7
Goat (unknown) 5
Cattle (unknown) 4
Aberdeen Angus 4
Chicken (unknown) 3

Most Reported Reactions

Lack of efficacy (protozoa) - Coccidia 38
INEFFECTIVE, COCCIDIA 32
Death 27
No sign 21
Hard, clumping 18
Lack of efficacy - NOS 17
Device Defective NOS 8
Seal, Abnormal 5
Overdose 5
Sudden death 4
Underdose 4
Accidental exposure 3

Outcome Breakdown

Outcome Unknown
84 (57.5%)
Died
36 (24.7%)
Recovered/Normal
13 (8.9%)
Ongoing
12 (8.2%)
Euthanized
1 (0.7%)

Decoquinate Adverse Event Insights

152 reports name Decoquinate; 36 recorded a death outcome (23.7% of reported events, not a population-level mortality rate). Active ingredient: Decoquinate. Administration routes: Oral, Unknown.

By species: Cattle (96 reports), Unknown (30 reports), Goat (7 reports). By breed: Unknown (30), Holstein-Friesian also known as Holstein (26), Cattle (other) (26).

Leading clinical signs: Lack of efficacy (protozoa) - Coccidia (38), INEFFECTIVE, COCCIDIA (32), Death (27), No sign (21). Outcome, 146 coded reports: Outcome Unknown leads at 57.5%.

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.

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

Every figure on PlainBreed is rendered directly from FDA openFDA adverse event data, no number is typed in by an editor. This page draws directly on FDA openFDA data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.