REVALOR-IS is for use in steers fed in confinement for slaughter. Contains 80 mg of trenbolone acetate/dose and 16 mg of estradiol/dose.

(trenbolone acetate & estradiol)



Revalor-IS is an implant containing 80mg of trenbolone acetate and 16mg estradiol. Each implant consists of four small yellow pellets. Ten implants are provided in a cartridge.

Manufactured by a non-sterilizing process.


Increases rate of weight gain and improves feed efficiency in a slow-release delivery system.
Do not use in veal calves. Effectiveness and animal safety in veal calves have not been established.


One implant containing 80mg trenbolone acetate and 16mg estradiol is administered to each animal. The four pellets which make up the dosage of Revalor-IS are contained in one division of the multiple dose cartridge. Ten doses are in each cartridge. The cartridge is designed to be used with a special implant gun.

Route of Administration

The implant is placed under the skin on the posterior aspect of the ear by means of a special implanter available from Merck Animal Health.


Not to be used in animals intended for subsequent breeding, or in dairy animals. For animal treatment only. Not for use in humans. Implant pellets in the ear only. Any other location is in violation of Federal Law. Do not attempt salvage of implanted site for human or animal food.

A withdrawal period has not been established for this product in pre-ruminating calves. Do not use in calves to be processed for veal.

Storage Conditions

Supplied in a cartridge of 10 doses in a sealed foil pouch. Store unopened product at or below 25°C (77°F). Avoid excessive heat and humidity. Open cartridges may be stored in the foil pouch protected from light in the refrigerator (2-8°C/36-47°F) for up to six months.


Code: 092206
Box of 10 x 10 cartridge implants.

For more information about Merck Animal Health products call 1-800-441-8272.

Fair Balance

A withdrawal period has not been established for Revalor-G in pre-ruminating calves. Do not use in calves to be processed for veal.
Merck and Texas Tech University – North American TBA Implant Database

For additional information, please see the product label.