Drug profile

The FDA adverse-event record for Nicarbazin

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

20
adverse-event reports
55.0%
death-coded share
Chicken
most-reported species
8
Death - 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.
20
Total Reports
11
Deaths Reported
55.0%
Death Rate

Active Ingredients

Nicarbazin

Administration Routes

UnknownOral

Species Affected

Chicken 11
Unknown 9

Most Affected Breeds

Unknown 9
Chicken (unknown) 7
Chicken (unspecified) 2
Cornish Cobb 1
Chicken (other) 1

Most Reported Reactions

Death 8
Potency, Low 6
Enteritis 3
INEFFECTIVE, COCCIDIA 3
Increased mortality rate 2
Dermatitis 1
Gangrene 1
Musculoskeletal disorder NOS 1
Contamination, Insects 1
Death by euthanasia 1
Lack of efficacy (protozoa) - Coccidia 1
NT - Abnormal necropsy finding NOS 1

Outcome Breakdown

Died
9 (69.2%)
Euthanized
2 (15.4%)
Outcome Unknown
1 (7.7%)
Ongoing
1 (7.7%)

Nicarbazin Adverse Event Insights

20 reports name Nicarbazin; 11 recorded a death outcome (55.0% of reported events, not a population-level mortality rate). Active ingredient: Nicarbazin. Administration routes: Unknown, Oral.

By species: Chicken (11 reports), Unknown (9 reports). By breed: Unknown (9), Chicken (unknown) (7), Chicken (unspecified) (2).

Leading clinical signs: Death (8), Potency, Low (6), Enteritis (3), INEFFECTIVE, COCCIDIA (3). Outcome, 13 coded reports: Died leads at 69.2%.

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.