Drug profile

The FDA adverse-event record for Trenbolone Acetate;Estradiol Benzoate

212 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Trenbolone Acetate;Estradiol Benzoate. See the species affected, top reactions, and outcomes below.

212
adverse-event reports
25.9%
death-coded share
Cattle
most-reported species
70
Increased sexual interest - 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.
212
Total Reports
55
Deaths Reported
25.9%
Death Rate

Active Ingredients

Trenbolone Acetate;Estradiol Benzoate

Administration Routes

UnknownSubcutaneous

Species Affected

Cattle 170
Unknown 40
Human 2

Most Affected Breeds

Mixed (Cattle) 129
Unknown 42
Holstein-Friesian also known as Holstein 26
Aberdeen Angus 8
Crossbred Bovine/Cattle 2
Charolais 1
Limousin 1
Cattle (unknown) 1
Corriente 1
Cattle (other) 1

Most Reported Reactions

Increased sexual interest 70
Death 38
Sexual disorder NOS (see 'Reproductive' for named sexual disorders) 28
Implant, Abnormal 18
Increased weight 13
Lack of efficacy - NOS 12
Implant site abscess 8
Musculoskeletal disorder NOS 7
Rectal prolapse 7
Device Defective NOS 7
Aggression 7
Anaphylactic-type reaction 7

Outcome Breakdown

Outcome Unknown
121 (55.5%)
Died
51 (23.4%)
Recovered/Normal
24 (11.0%)
Recovered with Sequela
8 (3.7%)
Euthanized
7 (3.2%)
Ongoing
7 (3.2%)

Trenbolone Acetate;Estradiol Benzoate Adverse Event Insights

212 reports name Trenbolone Acetate;Estradiol Benzoate; 55 recorded a death outcome (25.9% of reported events, not a population-level mortality rate). Active ingredient: Trenbolone Acetate;Estradiol Benzoate. Administration routes: Unknown, Subcutaneous.

By species: Cattle (170 reports), Unknown (40 reports), Human (2 reports). By breed: Mixed (Cattle) (129), Unknown (42), Holstein-Friesian also known as Holstein (26).

Leading clinical signs: Increased sexual interest (70), Death (38), Sexual disorder NOS (see 'Reproductive' for named sexual disorders) (28), Implant, Abnormal (18). Outcome, 218 coded reports: Outcome Unknown leads at 55.5%.

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.