Synovex

Synovex® C
(progesterone and estradiol benzoate implants)
100 mg progesterone and 10 mg estradiol benzoate per implant

SUBCUTANEOUS IMPLANTS FOR BEEF CALVES

This product was manufactured by a non-sterilizing process.

TAKE TIME OBSERVE LABEL DIRECTIONS

Important: Read ALL sides of carton For subcutaneous ear implantation only.

Approved by FDA under NADA # 009-576

Restricted Drug (California) — Use Only as Directed

No withdrawal period is required when used according to labeling. Do not use in beef calves less than 45 days of age, dairy calves, and veal calves. Do not use in bull calves intended for reproduction. A withdrawal period has not been established for this product in pre-ruminating calves. Do not use in dairy cows or in animals intended for subsequent breeding. Use in these cattle may cause drug residues in milk and/or in calves born to these cows. Implant pellets subcutaneously in ear only. Any other location is a violation of Federal Law. Do not attempt salvage of implanted site for human or animal food.

Not for use in humans. Keep out of reach of children.

Bulling has occasionally been reported in implanted steers and heifers. Vaginal and rectal prolapse, udder development, ventral edema and elevated tailheads have occasionally been reported in heifers administered SYNOVEX® C implants.

Implant complete contents of one cartridge cell to each steer or heifer at implanting. Approved implantation technique is fully described in the package insert.

NOTE: Never sacrifice careful, clean technique for speed of implantation.

• For increased rate of weight gain in beef calves 45 days of age and older and weighing up to 400 lbs.
• Not approved for repeated implantation (re-implantation) with this or any other cattle ear implant in beef calves 45 days of age and older and weighing up to 400 lbs. Safety and effectiveness following re-implantation have not been evaluated.

Do not use in calves less than 45 days of age or veal calves because effectiveness and safety have not been evaluated.
Do not use in bull calves intended for subsequent breeding, or in dairy cows.

Store at controlled room temperature 20° - 25°C (68° - 77°F) with excursions between 15°-30°C (59°-86°F). Avoid excessive heat or humidity.

For a copy of the Safety Data Sheet or to report side effects, contact Zoetis Inc. at 1-888-963-8471. For additional information about reporting side effects for animal drugs, contact FDA at 1-888-FDA-VETS or www.fda.gov/reportanimalae.

NET CONTENTS: 10 CARTRIDGES
Each Cartridge Contains 10 implants (100 implants total)

Distributed by:
Zoetis Inc.
Kalamazoo, MI 49007

Revised: June 2026

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