MGA

Manufacturer
Zoetis Inc.
Effective date
2021-05-12
Label type
OTC ANIMAL DRUG LABEL
Version
6
Source
full-release
Hydrated at
2026-06-01 02:40:58

Label at a glance#

ProductMGA 200
Active ingredientMELENGESTROL ACETATE
Label structure6 sections

Dosage and administration

Heifers Fed in Confinement for Slaughter: MGA 200 (melengestrol acetate Type A medicated article) should be thoroughly mixed in the supplement to provide 0.25 to 0.50 mg of melengestrol acetate per head per day. Average daily intakes approximating the middle of this range provide the most optimal and economical improvements in rate of gain and feed utilization. Constant daily intakes of 0.35 to 0.50 mg per head pe...

Label contents#

Full prescribing information#

SPL UNCLASSIFIED SECTION

MGA® 200

(melengestrol acetate Type A medicated article)

Heifers Fed in Connement for Slaughter:

For Increased Rate of Weight Gain, Improved Feed Efficiency and Suppression of Estrus (Heat).

Heifers Intended for Breeding:

For Suppression of Estrus (Heat).

SPL UNCLASSIFIED SECTION

Each pound contains:

 

Active Drug Ingredient:

Melengestrol Acetate ……………… 200 mg

Inactive Ingredients:

 Soybean hulls, #20 grind …………… 96.0%

Starch ………………………………… 2.98%

Mineral Oil ………………………………1.0%

 

Store in a Dry Place to Prevent Caking.

 

Store below 25°C (77°F), excursions permitted to 40°C (104°F).

Use only as directed. Excessive contact with skin should be avoided. Destroy empty container. Do not reuse.

Caution:
For manufacturing, processing or repacking. To be mixed with feed prior to animal use.

Approved by FDA under NADA # 039-402

Net Weight 50 Lb (22.7 kg)

DIRECTIONS FOR USE:

INDICATIONS & USAGE SECTION

Heifers Fed in Confinement for Slaughter: MGA 200 (melengestrol acetate Type A medicated article) should be thoroughly mixed in the supplement to provide 0.25 to 0.50 mg of melengestrol acetate per head per day. Average daily intakes approximating the middle of this range provide the most optimal and economical improvements in rate of gain and feed utilization. Constant daily intakes of 0.35 to 0.50 mg per head per day give a high degree of estrus suppression. Levels of 0.25 to 0.35 mg provide a lower but still effective degree of estrus suppression.

Heifers Intended for Breeding: MGA 200 should be thoroughly mixed in the supplement to provide 0.5 mg of melengestrol acetate per head per day.

NOT FOR HUMAN USE.

CAUTION: Not effective in steers and spayed heifers.

Heifers Fed in Confinement for Slaughter: Withdrawal periods of three to five days or more should be avoided to prevent the possibility that the heifers may come into estrus (heat) at loading time.

Heifers Intended for Breeding:

Do not exceed 24 days of feeding of melengestrol acetate to heifers intended for breeding. A reduced conception rate can be expected if heifers are bred at estruses observed within 1 to 12 days after withdrawal of melengestrol acetate, whereas heifers bred at subsequent observed estruses are expected to have normal conception rates.

Mixing Directions

DOSAGE & ADMINISTRATION SECTION

Thoroughly mix 1.25 to 10 pounds of MGA 200 per ton of non-medicated feed to prepare a Type C medicated feed containing 0.25 to 2.0 grams of melengestrol acetate per ton. The following Table may be used as a guide in determining the amount of MGA 200 to be added to prepare a ton of Type C medicated feed.

 

Amount of
Type C Feed Fed
(lb/head/day)
 

Melengestrol
Acetate
(mg/head/day)

Pounds MGA 200 per Ton 
of Type C Feed

 0.5  0.25  5.00
 0.5  0.30  6.00
 0.5  0.35  7.00 
 0.5  0.40  8.00
 0.5  0.45  9.00
 0.5  0.50 10.00 
 1.0  0.25  2.50
 1.0  0.30  3.00
 1.0  0.35  3.50
 1.0  0.40  4.00
 1.0  0.45  4.50
 1.0  0.50  5.00
 1.5  0.25  1.67
 1.5  0.30  2.00
 1.5  0.35  2.33
 1.5  0.40  2.67
 1.5  0.45  3.00
 1.5  0.50  3.33
 2.0  0.25  1.25
 2.0  0.30  1.50
 2.0  0.35  1.75
 2.0  0.40  2.00
 2.0  0.45  2.25
 2.0  0.50  2.50

Type B medicated feeds containing 4 to 10 grams melengestrol acetate per ton may be manufactured by thoroughly mixing 20 to 50 lbs of MGA 200 with 1980 to 1950 lbs of non-medicated feed. Labeling for such Type B feeds shall contain directions for manufacturing Type C medicated feeds containing 0.25 to 2.0 grams melengestrol acetate per ton (0.125–1.0 mg/lb). The Type C medicated feed, containing melengestrol acetate, must be top dressed on grain or roughage or mixed with a complete ration at the rate of 0.5 to 2.0 pounds per head per day.

Good manufacturing practice regulations must be adhered to in manufacturing feeds containing MGA 200.

SPL UNCLASSIFIED SECTION

Restricted Drug (California)—Use Only as Directed

zoetis


Distributed by:
Zoetis Inc.
Kalamazoo, MI 49007

50743801

Principal Display Panel - Bag Label

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL

Bag LabelBag Label

DailyMed Package Descriptions#

Package NDC, Product, Description table
Package NDCProductDescriptionFormQuantityStrengthSPL version
54771-1952-1MGA20018 kg in 1 BAGGRANULE186

DailyMed Dashboard NDC Coverage#

NDC, Dashboard title, SPL version table
NDCDashboard titleSPL versionValidationDashboard ZIP
54771-1952MGA 200 (MELENGESTROL ACETATE) GRANULE [ZOETIS INC.]61 package rows20210513_f8438558-d6d5-4bb9-9d19-8d35517ff0ea.zip

Products#

Every source-derived product name is available through these pages.

DailyMed product names page 1 of 1 · 3 matching rows.

NDC Codes#

Product NDC, Package NDC table
Product NDCPackage NDC
54771-195254771-1952-1

Ingredients#

Every source-derived ingredient row is available through these pages.

DailyMed ingredient rows page 1 of 1 · 1 matching rows.

Name, UNII, Kind table
NameUNIIKind
MELENGESTROL ACETATE4W5HDS3936ACTIB

Source Document#

Source XML

Reported adverse events (FAERS/openFDA)#

Adverse event summaries are temporarily unavailable. Other product information remains available.