Melengestrol Acetate
279 adverse event reports submitted to the FDA
Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
279
Total Reports
46
Deaths Reported
1650.0%
Death Rate
Active Ingredients
Melengestrol Acetate
Administration Routes
OralUnknown
Species Affected
Cattle 256
Unknown 22
Human 1
Most Affected Breeds
Mixed (Cattle) 121
Cattle (other) 46
Cattle (unknown) 42
Crossbred Bovine/Cattle 24
Unknown 24
Holstein-Friesian also known as Holstein 8
Aberdeen Angus 7
Charolais 2
Simmental 1
Jersey 1
Most Reported Reactions
INEFFECTIVE, ESTRUS SUPPRESSIO 110
Lack of efficacy - NOS 79
Death 25
Lameness 19
Increased sexual interest 12
Pneumonia 12
No sign 11
Death by euthanasia 11
Unclassifiable adverse event 11
Sexual disorder NOS (see 'Reproductive' for named sexual disorders) 10
Bloated 9
Rectal prolapse 8
Outcome Breakdown
Outcome Unknown
200 (69.0%)
Died
36 (12.4%)
Recovered/Normal
33 (11.4%)
Euthanized
12 (4.1%)
Recovered with Sequela
7 (2.4%)
Ongoing
2 (0.7%)
Source: FDA Center for Veterinary Medicine — Adverse Event Reports. Data reflects voluntary submissions and may not represent actual incidence rates.