Drug profile

The FDA adverse-event record for Fenbendazol Block

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

62
adverse-event reports
8.1%
death-coded share
Unknown
most-reported species
20
Appearance, Abnormal - top reaction
Verify with FDA CVM →
Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
62
Total Reports
5
Deaths Reported
8.1%
Death Rate

Active Ingredients

Fenbendazol Block

Administration Routes

UnknownOral

Species Affected

Unknown 46
Cattle 15
Goat 1

Most Affected Breeds

Unknown 46
Cattle (other) 5
Crossbred Bovine/Cattle 3
Cattle (unknown) 2
Red Angus 2
Aberdeen Angus 2
Goat (unknown) 1
Brangus 1

Most Reported Reactions

Appearance, Abnormal 20
Product problem 19
UNPALATABLE 10
Product Defect, General 9
Underfilling, Container 5
Product label information incorrect 5
Uncoded sign 4
Death 4
Difficulty of Use 3
Containers, Damaged 3
Bloated 2
Lack of efficacy - NOS 2

Outcome Breakdown

Outcome Unknown
7 (38.9%)
Died
5 (27.8%)
Ongoing
4 (22.2%)
Recovered/Normal
2 (11.1%)

Fenbendazol Block Adverse Event Insights

62 reports name Fenbendazol Block; 5 recorded a death outcome (8.1% of reported events, not a population-level mortality rate). Active ingredient: Fenbendazol Block. Administration routes: Unknown, Oral.

By species: Unknown (46 reports), Cattle (15 reports), Goat (1 reports). By breed: Unknown (46), Cattle (other) (5), Crossbred Bovine/Cattle (3).

Leading clinical signs: Appearance, Abnormal (20), Product problem (19), UNPALATABLE (10), Product Defect, General (9). Outcome, 18 coded reports: Outcome Unknown leads at 38.9%.

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.