Animal & Veterinary

ANADA 200-184 Chanazine® 20 mg/mL - original approval

Approval Date: July 12, 1996





Chanelle Pharmaceutical Manufacturing Ltd.
Loughrea, County Galway

Generic Name:

Xylazine hydrochloride, 20 mg/mL

Trade Name:

Chanazine® 20 mg/mL

Marketing Status:


Dosage Form: Solution

How Supplied: 20 mL multiple dose vials

How Dispensed: Rx

Amount of Active Ingredients: Each mL contains 20 mg xylazine, base equivalent

Route of Administration: Intravenous, intramuscular, or subcutaneous

Species: Dogs and cats

Labeled Dosages:

Intravenously-0.5 mL/20 lbs body weight (0.5 mg/lb)

Intramuscularly or subcutaneously-1 mL/20 lbs body weight (1 mg/lb)

In large dogs (over 50 lbs), a dosage of 0.5 mg/lb administered intramuscularly may provide sufficient sedation and/or analgesia for most procedures.

These doses produce sedation which is usually maintained for 1 to 2 hours and analgesia which lasts for 15 to 30 minutes.

Indications for Use: Chanazine (xylazine) should be used in dogs and cats when it is desirable to produce a state of sedation accompanied by a shorter period of analgesia. Xylazine has been used successfully as follows:

  1. Diagnostic procedures - examination of mouth and ears, abdominal palpation, rectal palpation, vaginal examination, catheterization of the bladder and radiographic examinations.
  2. Orthopedic procedures, such as application of casting materials and splints.
  3. Dental procedures.
  4. Minor surgical procedures of short duration such as debridement, removal of cutaneous neoplasms and suturing of lacerations.
  5. To calm and facilitate restraint of fractious animals.
  6. Therapeutic medication for sedation and relief of pain following injury or surgery.
  7. Major surgical procedures:
    1. When used as a preanesthetic to general anesthesia.
    2. When used in conjunction with local anesthetics.
  8. Pioneer Product: Rompun® (xylazine) 20 mg/mL Injectable, NADA 047-955 by Bayer Corporation., Agriculture Division, Animal Health


Under the provisions of the Federal Food, Drug, and Cosmetic Act, as amended by the Generic Animal Drug and Patent Term Restoration Act, (53 FR 50460, December 15, 1988; First GADPTRA Policy Letter), an Abbreviated New Animal Drug Application (ANADA) may be submitted for a generic version of an approved new animal drug (pioneer product). For certain dosage forms, the Agency grants a waiver from conducting an in vivo bioequivalence study (55 FR 24645, June 18, 1990; Fifth GADPTRA Policy Letter). In lieu of bioequivalence testing, the safety and efficacy of the generic product are based on the demonstrated chemical equivalence to the pioneer product.

Based on the formulation characteristics of the generic product, Chanelle Manufacturing Pharmaceutical, Ltd. was granted a waiver June 15, 1992 (photocopy attached) from conducting an in vivo bioequivalence study with Chanazine® 20 mg/mL Injectable. The generic and pioneer products are solutions with the same inactive ingredients and the same concentrations of the active ingredient. It is intended for intravenous, intramuscular, and subcutaneous injection.


Human Safety Relative to Food Consumption
Regarding consumption of drug residues in food, human safety data were not required for approval of this ANADA. This drug is labeled for use in dogs and cats only and should not be administered to food-producing animals.

Human Safety Relative to Possession, Handling, and Administration
Labeling contains adequate caution/warning statements.


This is an Abbreviated New Animal Drug Application (ANADA) filed under Section 512(b)(2) of the Federal, Food, Drug and Cosmetic (FFD&C) Act.

Safety and effectiveness for this generic animal drug, Chanazine® 20 mg/mL Injectable, were established by demonstration of chemical equivalence to the pioneer product, Bayer Corporation's Rompun® 20 mg/mL Injectable (xylazine hydrochloride, 20 mg/mL, NADA 047-955).

This generic product and the pioneer product have identical labeling indications for use. The route and method of administration of the two drugs are identical. Both drugs are administered by intravenous, intramuscular, or subcutaneous injection. The generic and pioneer products are both solutions that contain the same active and inactive ingredients in the same concentrations. Both products have the same pH. Therefore, consistent with FDA policy implementing Section 512(b)(2) of the FFD&C Act, no additional safety, efficacy, or in vivobioequivalency studies were necessary or required. This ANADA satisfies the requirements of section 512 of the Act and demonstrates that Chanazine is safe and effective for its labeled indications when used under its proposed conditions of use.


  1. Generic Labeling:
    • Package Insert
    • Immediate Container Label
    • Shipping Label
  2. Pioneer Labeling:
    • Package Insert
    • Carton Label
    • Bottle Label
    • Copy of waiver letter dated June 15, 1992

Copies of these labels may be obtained by writing to the:

Freedom of Information Office
Center for Veterinary Medicine, FDA
7500 Standish Place
Rockville, MD 20855

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