Melengestrol Acetate for Cattle
Livestock · Bos taurus · typical adult weight 250.00–900.00 kg
Melengestrol Acetate is used in cattle for Estrus suppression, synchronization, Estrus suppression in feedlot heifers. Routes documented in cattle: PO. A typical adult cattle weighs 250.00–900.00 kg. ExoticRx lists 2 cited dose rules for Melengestrol Acetate in cattle, drawn from published veterinary references. Verify against current literature before clinical use.
Trade names: MGA
Dose ranges
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 0.5 mg/head/day | q24h in feed | 14 days | Estrus suppression, synchronization | Strong | FDA NADA Label |
| PO | 0.5 mg/head/day in feed | q24h in feed | 14 days for sync; continuous for suppression | Estrus suppression in feedlot heifers | Strong | FDA NADA Label |
Absolute dose ceiling, regardless of body weight: 0.5 mg total (PO).
Need the exact dose for your patient?
These ranges are per kg. Enter your cattle's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
Mechanism of action
Synthetic progestogen that suppresses estrus and ovulation in heifers by negative feedback on gonadotropin secretion. Also has mild growth-promoting effects.
Side effects & warnings
For heifers only. Do not use in dairy cows or breeding animals. Used in estrus synchronization protocols (MGA + prostaglandin). No withdrawal period for meat at approved doses. Not for use in animals intended for breeding during treatment.
Species-specific contraindications and adverse-reaction reports for cattle may differ from canine / feline reference data — consult the primary citations listed with each rule.
Other Endocrine drugs with cattle dosing
Why a species-specific page? Melengestrol Acetate pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in cattle — the rules above are the citations specific to this species, not generic recommendations.
Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.