Rompun 20 mg/mL Injectable (Canada)

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Rompun 20 mg/mL Injectable

This treatment applies to the following species:
Manufacturer: Bayer

(Xylazine)

Sterile

Sedative and Analgesic

For Use in Dogs, Cats and Cattle

DIN 02169592

VETERINARY USE ONLY

DESCRIPTION:

Rompun® (Xylazine) is supplied in 20 mL multiple-dose vials as a sterile solution.

Each mL contains 20 mg Rompun (xylazine base equivalent), 0.9 mg methylparaben, 0.1 mg propylparaben, sterile water; citric acid and sodium citrate for pH adjustments to 5.5 ± 0.3.

Active Ingredient

xylazine 2(2,6-Dimethylphenylamino)-4H-5,6-dihydro-1,3 thiazine hydrochloride

(equivalent to 2% base)

2.3%

Inert Ingredients:

97.7%

Total:

100%

PHARMACOLOGY:

Rompun is a potent sedative and analgesic as well as a muscle relaxant. Its sedative and analgesic activity is related to central nervous system depression. Its muscle-relaxant effect is based on inhibition of the intraneural transmission of impulses in the central nervous system. The principal pharmacological activities develop within 10 to 15 minutes after intramuscular injection and within 3 to 5 minutes following intravenous administration.

A sleeplike state, the depth of which is dose-dependent, is usually maintained for 1 to 2 hours, while analgesia lasts from 15 to 30 minutes. The centrally-acting muscle relaxant effect causes relaxation of the skeletal musculature, complementing sedation and analgesia.

In animals under the influence of Rompun, the respiratory rate is reduced as in natural sleep. Following treatment with Rompun, the heart rate is decreased and a transient change in the conductivity of the cardiac muscle may occur as evidenced by a partial atrioventricular block. This resembles the atrioventricular block often observed in normal animals1,2,3,4. Intravenous administration of Rompun causes a transient rise in blood pressure, followed by a slight decrease.

Rompun has no effect on blood clotting time or other hematologic parameters.

In limited tests, Rompun has been tolerated in dogs and cats at 10 times the recommended dose. However, doses of this magnitude produced muscle tremors and long periods of sedation.

Rompun 20 mg/mL Injectable Indications: Dogs And Cats

Rompun should be used in dogs and cats when it is desirable to produce a state of sedation accompanied by a shorter period of analgesia. Rompun 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 the 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 handling of fractious animals.

6. Therapeutic medication for sedation and relief of pain following injury or surgery.

7. Major surgical procedures:

a. When used as a preanesthetic to general anesthesia.

b. When used in conjunction with local anesthetics.

CONTAINDICATIONS:

Rompun is not recommended for use in pregnant cats.

DOSAGE AND ADMINISTRATION:

DOGS AND CATS

1. Intravenously - 0.5 mL/20 lbs body weight (0.5 mg/lb) (1.1 mg/kg)

Intramuscularly or subcutaneously - 1.0 mL/20 lbs body weight (1 mg/lb or 2.2 mg/kg). 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.

Since vomiting may occur (see SIDE EFFECTS), fasting for 6-24 hours prior to the use of Rompun may reduce the incidence; the I.V. route results in the least vomiting.

Following injection of Rompun, the animal should be allowed to rest quietly until the full effect has been reached.

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

2. Preanesthetic to Local Anaesthesia: Rompun at the recommended dosages can be used in conjunction with local anesthetics such as procaine or lidocaine.

3. Preanesthetic to General Anaesthesia: Rompun, at the recommended dosage rates, produces an additive effect to central nervous system depressants such as pentobarbital sodium, thiopental sodium and thiamylal sodium. Therefore, the dosage of such compounds should be reduced and administered to the desired effect. In general, only 1/3 to 1/2 of the calculated dosage of the barbiturates will be needed to produce a surgical plane of anesthesia. Post anesthetic or emergence excitement has not been observed in animals preanesthetized with Rompun.

Rompun has been used successfully as a preanesthetic agent for pentobarbital sodium, thiopental sodium, thiamylal sodium, nitrous oxide, ether, halothane and methoxyflurane anesthesia.

Side Effects: Dogs And Cats

Emesis occurs occasionally in dogs, and frequently in cats, soon after the administration of Rompun. When observed, emesis usually occurs only a single time, after which there is no further emetic effect.

The use of antiemetics may delay this phenomenon.

The occurrence of emesis may be considered a desirable effect when Rompun is administered as a preanesthetic to general anesthesia.

Rompun used at recommended dosage levels may occasionally cause slight muscle tremors, bradycardia with partial A-V heart block and a reduced respiratory rate. Should excessive respiratory depression occur following the use of Rompun, administer respiratory stimulants and provide artificial respiration.

Movement in response to sharp auditory stimuli may be observed.

Increased urination may occur in cats following the use of Rompun.

Rompun 20 mg/mL Injectable Caution: Dogs And Cats

Until more definitive studies are completed, Rompun is not recommended for use in pregnant cats.

Careful consideration should be given before administering to dogs or cats with significantly depressed respiration, severe pathologic heart disease, advanced liver and kidney disease, severe endotoxic or traumatic shock.

Since an additive effect results from the use of Rompun and the barbiturate compounds, it should be used with caution with these central nervous system depressants. Products known to produce respiratory depression or apnea, such as thiamylal sodium, should be given at a reduced dosage and, when injected intravenously, should be administered SLOWLY.

When intravenous administration is desired, avoid perivascular injection in order to achieve the desired effect. Studies have shown negligible evidence of tissue irritation, however, following perivascular injection of Rompun.

Following the use of Rompun, veterinarians and attendants should continue to use care and appropriate handling techniques, since conscious animals, although sedated, are arousable and capable of inflicting personal injury.

Do not use Rompun in conjunction with tranquilizers.

Bradycardia and an arrhythmia in the form of incomplete atrioventricular block have been reported following Rompun administration. Although clinically the importance of this effect is questioned1,2,3,4, a standard dose of atropine given prior to or following Rompun will greatly decrease the incidence.

Rompun 20 mg/mL Injectable Indications: Cattle

Rompun is indicated in cattle to produce a state of sedation accompanied by a shorter period of analgesia. It has been used successfully as follows:

1. Diagnostic procedures - oral, vaginal and rectal examinations, as an aid in the collection of biopsies or blood samples 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 of wounds, dehorning, castration and suturing of skin lacerations.

5. Major surgical procedures when used in conjunction with local and epidural anesthetics - suturing of lacerations of the teat and udder, surgery of the penis and sheath, caesarean sections, hernia repairs, digital amputations and eye enucleations.

6. Hoof trimming and handling of fractious animals.

Rompun 20 mg/mL Injectable Dosage And Administration: Cattle

Intramuscularly - Range of 0.25 to 0.75 mL/100 lbs body weight (Equivalent to 0.05 to 0.15 mg/lb or 0.11 to 0.33 mg/kg).

Ruminants are more sensitive to Rompun than are other species in which the drug is indicated, and thus a much smaller dose is required per unit body weight to produce the desired effect.

The dosage of Rompun in the bovine species needed to achieve the desired effect varies between animals, depending largely upon the temperament of the individual animal. Quieter or more docile cattle will require a smaller dose to achieve the same effect. Rompun will often make the animal recumbent especially at the higher dose rates. Following injection of Rompun the animal should be allowed to rest quietly until the full effect has been reached.

Within the recommended dosage range, a range of effects can be achieved depending on the dose given. Low doses of Rompun produce a sedation and limited dermal analgesia while larger doses produce sedation, muscle relaxation and analgesia along with a sleep like state. This sleep like state, in conjunction with the sedation, analgesia and muscle relaxation described, produce recumbency and a true anaesthesia like condition under which many procedures may be carried out with or without local anaesthesia. Even high doses will not eliminate pain in the claws and lower limbs.

After intramuscular injection of Rompun the onset of sedation and analgesia follows in less than 10 minutes along with some incoordination. The duration of sedation and analgesia along with the ability to stand depends on the dose given. Duration of sedation and analgesia will vary from 30 minutes with low doses to 2 to 3 hours with higher doses.

Within the recommended dosage range Rompun can be used in conjunction with local anaesthetics such as procaine and lidocaine. Many procedures may be carried out using Rompun alone especially at the higher dose rates.

Side Effects: Cattle

Rompun used at recommended dosage levels may occasionally cause slight muscle tremors, bradycardia and a reduced respiratory rate. Temporary salivation, diuresis and ruminal stasis may be observed during the period of sedation. A transient, self-limiting diarrhea may occur 24 to 48 hours following administration.

Rompun 20 mg/mL Injectable Caution: Cattle

Careful consideration should be given before administering to cattle with significantly depressed respiration, severe pathologic heart disease, advanced liver or kidney disease, severe endotoxic or traumatic shock.

Special precautions should be taken when administered during warm environmental conditions as HYPERTHERMIA may occur. Proper aftercare must be provided for those cases. Always provide cool shade during the recovery period.

Do not use in pregnant animals as studies have not been completed to show its safety in all stages of pregnancy. Premature parturition and retained placenta have been reported in a limited number of cases where Rompun was administered during the last trimester of pregnancy.

Lateral recumbency is to be avoided during recovery due to increasing the possibilities of bloat, regurgitation and/or aspiration. Sternal recumbency is the appropriate recovery position. A 24-hour fast prior to injection will also reduce the incidence of bloat.

Do not use Rompun in conjunction with tranquilizers.

Following the use of Rompun, veterinarians and attendants should continue to use care and appropriate handling techniques, since conscious animals, although sedated, are capable of inflicting personal injury.

Safety:

Rompun has been tolerated in cattle at 10 times the recommended dose. However, doses of this magnitude produced muscle tremors and long periods of sedation with careful surveillance necessary during the recovery period.

WARNING:

TREATED CATTLE MUST NOT BE SLAUGHTERED FOR USE IN FOOD FOR AT LEAST 3 DAYS AFTER THE LATEST TREATMENT WITH THIS DRUG. MILK TAKEN FROM TREATED ANIMALS DURING TREATMENT AND WITHIN 48 HOURS AFTER THE LATEST TREATMENT MUST NOT BE USED FOR FOOD.

This drug is for use in Dogs, Cats and Cattle only.

STORAGE:

Do not store below 4 °C or above 30 °C.

References

1. Detweiller, D.K.: The Diagnosis and Significance of Cardiac Arrhythmias in Progress in Equine Practice. Edited by E.J. Catcott and J.F. Smithcors. American Veterinary Publications, Inc., Santa Barbara, California and Wheaton, Illinois, (1966), 280-281.

2. Glazier, D.B.: Atrioventricular Heart Block. Irish Vet. J., Vol. 12, (1958): 194-198.

3. Holmes, J.R., Alps, B.J.: Observations on Partial Atrioventricular Heart Block in the Horse. Can. Vet. J., Vol. 7, No. 12, (1966): 280-290.

4. Detweiller, D.K., Patterson, D.F., Luginbuh, H., Rhodes, W.H., Buchanan, J.W., Knight, D.H., Hill, J.D.: Diseases of the Cardiovascular System in Canine Medicine. Edited by E.J. Catcott. American Veterinary Publication, Inc., Santa Barbara, California and Wheaton, Illinois, (1968), 589-679.

Bayer, Bayer Cross, and Rompun are registered trademarks of Bayer AG used under license.

Bayer HealthCare, Bayer Inc., Animal Health Division, Toronto, Ontario M9W 1G6

08937039, R.0

August, 2005

08937551

1305300

12795

NAC No.: 12230251

BAYER HEALTHCARE
Animal Health Division, Bayer Inc.

77 BELFIELD ROAD, TORONTO, ON, M9W 1G6
Telephone:   416-248-0771 or 800-268-1331
Toll-Free:   800-62-BAYER
Order Desk:   800-387-9179
Order Desk Fax:   800-361-3306
Fax:   416-240-4918
Website:   www.animalhealth.bayer.ca
Every effort has been made to ensure the accuracy of the Rompun 20 mg/mL Injectable information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the Canadian product label or package insert.

Copyright © 2014 North American Compendiums. Updated: 2014-04-11

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