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Revalor-XS (Canada)

This page contains information on Revalor-XS for veterinary use.
The information provided typically includes the following:
  • Revalor-XS Indications
  • Warnings and cautions for Revalor-XS
  • Direction and dosage information for Revalor-XS


This treatment applies to the following species:
Company: Merck Animal Health

Trenbolone acetate 200 mg / estradiol 40 mg

Veterinary Use Only


DIN: 02316994


Revalor®-XS is an implant containing 200 mg of trenbolone acetate and 40 mg estradiol. Each implant consists of 10 small yellow pellets composed of four uncoated and six with a specialized coating formula for delayed and prolonged release.

Each pellet contains:

Active ingredients: 20 mg trenbolone acetate, 4 mg estradiol.

Non-medicinal ingredients: 6.25 mg cholesterol, 0.5 mg magnesium stearate, 1.25 mg ethylcellulose N200, 1.75 mg poly-(DL-lactide-co-glycolide) 65:35, 0.1 mg colloidal silica anhydrous.

Therapeutic Classification

Growth promotant.

Revalor-XS Indications

To increase rate of weight gain and improve feed efficiency for up to 200 days in feedlot steers weighing 225-350 kg.

Revalor-XS Dosage And Administration

Dosage form:

One implant containing 200 mg trenbolone acetate and 40 mg estradiol is administered to each animal. The 10 pellets which make up the dosage of Revalor®-XS are contained in one division of the multiple dose cartridge. Ten doses are in each cartridge. The cartridge is designed to be used with the Revalor® implant gun.


A) Site Of Administration

The implant is placed under the skin on the posterior aspect of the ear by means of the Revalor® implanter available from Intervet Canada Corp. After properly restraining the animal to allow access to the ear, cleanse the skin at the implant needle puncture site. Improperly cleansed skin may result in abscess formation and the subsequent loss of the implant. The implant is placed subcutaneously between the skin and the cartilage on the back, middle third of the ear below the midline (see Figure 1). The implant must not be placed closer to the head than the outer edge of the cartilage ring. The location of the needle insertion is at a point corresponding to the center of the ear with the needle directed towards the head, and at least a needle length away from the intended deposition site (see Figure 2). Care should be taken to avoid injuring the major blood vessels or cartilage of the ear.

Figure 1

Ear of bovine ready for implantation.

Figure 2

Rear view of the bovine ear showing the site for insertion of the implanter needle.

b) method of administration

1. Do not remove the cap (C) of the cartridge containing the implants.

2. Place the cartridge (D) (with the capped end to the front) into slot at the top of the implanter magazine (labelled A on the diagram).

3. Gently push the cartridge into the slot until it clicks into place.

4. The implanter is now ready for use.

5. Take the ear of the animal firmly with the free hand (in the manner shown in Figure 1) and insert the needle into the subcutaneous tissue at the point indicated (Figure 2). Press the trigger (E on Figure 3).

6. The retraction bar will automatically withdraw the needle from the ear aiding in depositing the pellets of the implant in a single row.

7. The gun automatically advances the cartridge to the next implant.

8. When all the implants have been administered, the cartridge will fall out of the bottom of the magazine and may be replaced by a new one.

9. To change the needle, loosen the needle locking nut (labelled F in Figure 3) and replace the needle. Tighten the nut finger tight and the implanter is ready for use.

Figure 3

Diagram of the implanter and cartridge.

Revalor-XS Cautions

For use in feedlot steers only. Do not use in animals intended for subsequent breeding.


Do not use in calves to be processed for veal. Implant pellets in the ear only. Do not attempt salvage of implant site for human or animal food. Keep out of reach of children.


Store the unopened product below 25 °C. Do not freeze. Store the opened product under refrigeration (2-8 °C). Do not use the opened product after 6 months.


Box of 10 cartridges x 10 implants (100 implants).

Intervet Canada Corp., 16750, route Transcanadienne, Kirkland, QC H9H 4M7

1 888 306-0069

Intervet Canada Corp. is a subsidiary of Merck & Co., Inc

® Registered trademark of Intervet International B.V. Used under license.

September 9, 2011

CPN: 12082124

Intervet Canada Corp.

Order Desk:   514-428-7013
Toll-Free:   866-683-7838
Fax:   Toll-free 888-498-4444; local 514-428-7014
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