Micotil (Canada)

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

Micotil

This treatment applies to the following species:
Manufacturer: Elanco

Tilmicosin Injection USP

DIN 00857602

AH 0230

Each mL contains 300 mg of tilmicosin

VETERINARY USE ONLY

Sterile

For use in cattle and lambs only.

An antibiotic for subcutaneous administration in cattle and lambs.

Description

Micotil injection is a preconstituted solution of the antibiotic tilmicosin. Each mL contains 300 mg of tilmicosin activity; 25% propylene glycol; phosphoric acid as needed to adjust pH; water for injection, q.s. Tilmicosin is produced semi-synthetically and is a member of the macrolide class of antibiotics.

ACTIVITY: Micotil has an in vitro antibacterial spectrum that is predominantly Gram positive with activity against certain Gram negative microorganisms. Activity against several mycoplasma species has also been detected.

Microorganism

Minimum Inhibitory Concentration (µg/mL)

Pasteurella multocida

6.25

Mannheimia (Pasteurella) haemolytica

3.12

Haemophilus somnus

6.25

Staphylococcus aureus

0.78

Streptococcus agalactiae

3.12

Actinomyces pyogenes

0.024

Clostridium perfringens

3.12

Clostridium sordellii

3.12

Fusobacterium necrophorum

3.12

Escherichia coli

≥ 50.00

Salmonella typhimurium

≥ 50.00

Mycoplasma dispar

0.097

Mycoplasma bovirhinis

0.024

Mycoplasma bovoculi

0.048

Acholeplasma laidlawii

0.024

One hundred thirty-four of 139 (96.4%) Mannheimia (Pasteurella) haemolytica isolates tested were inhibited by less than or equal to 3.12 µg/mL tilmicosin.

With Pasteurella multocida Carter Type A of bovine origin, 53/54 (98.2%) isolates tested were inhibited by less than or equal to 12.5 µg/mL tilmicosin and 39/54 (72.2%) by less than or equal to 6.25 µg/mL.

In addition to its direct antibacterial action, tilmicosin may exert an anti-inflammatory effect in the lung by increasing neutrophil apoptosis and reducing the release of pro-inflammatory mediators. However, the clinical significance of this effect is unknown.

In clinical trials, BRD treatment success with Micotil was usually characterized by rapid reduction in body temperatures, less severity of clinical signs, better weight gains and reduced mortality.

TOXICOLOGY: The cardiovascular system appears to be the target of toxicity in laboratory animals and domestic livestock administered Micotil by oral or parenteral routes. The primary cardiac effects are increased heart rate (tachycardia) and decreased contractility (negative inotropy). Cardiovascular toxicity may be due to calcium channel blockade.

Upon injection subcutaneously, the acute median lethal dose (MLD) of tilmicosin in mice is 97 mg of activity per kg and in rats is 185 mg/kg of body weight. Given orally, the MLD of tilmicosin is 800 mg/kg and 2250 mg/kg in fasted and nonfasted rats respectively. No compound-related lesions were found at necropsy.

In dogs, intravenous calcium offset Micotil-induced tachycardia and negative inotropy, restoring arterial pulse pressure within approximately 20 minutes. Dobutamine dose-dependently partially offset the negative inotropic effects induced by Micotil in dogs, but did not have an effect on the increased heart rate caused by Micotil. β-adrenergic antagonists, such as propranolol, exacerbated the negative inotropy of Micotil in dogs.

In monkeys, a single intramuscular dose of Micotil at 10 mg/kg caused no signs of toxicity. A single dose of Micotil at 20 mg/kg caused vomiting and 30 mg/kg caused the death of the only monkey tested.

In swine, intramuscular injection of Micotil at 10 mg/kg caused increased respiration, emesis and a convulsion, 20 mg/kg resulted in mortality in 3 of 4 pigs and 30 mg/kg caused the death of all 4 pigs tested. Injection of Micotil at 4.5 and 5.6 mg/kg intravenously followed by epinephrine, 1 mL (1:1000) intravenously 2 to 6 times, resulted in death of all pigs injected. All pigs given 4.5 mg/kg and 5.6 mg/kg Micotil intravenously with no epinephrine survived. These results suggest intravenous epinephrine may be contraindicated.

Results of genetic toxicology studies were all negative. Results of teratology and reproduction studies in rats were negative. The no effect level in dogs after daily oral doses of tilmicosin for up to one year is 4 mg/kg of body weight.

In cattle, subcutaneous doses of Micotil at 10, 30 and 50 mg/kg of body weight, each injected at 72 hour intervals for three times, did not cause any deaths. As expected, edema at the site of injection was noted. In cattle, the only lesion observed at necropsy was minimal myocardial necrosis in the 50 mg/kg Micotil group. Subcutaneous doses of Micotil at 150 mg/kg injected at 72 hour intervals resulted in deaths. Edema was marked at the site of injection. Minimal myocardial necrosis was the only lesion observed at necropsy. Deaths of cattle have been observed with a single intravenous dose of Micotil at 5 mg/kg of body weight.

In lambs, single subcutaneous doses of Micotil up to 150 mg/kg of body weight did not cause death. Deaths of lambs have been observed with a single intravenous dose of 7.5 mg/kg body weight.

PHARMACOKINETICS: A single subcutaneous injection of Micotil at 10 mg/kg of body weight in cattle resulted in peak tilmicosin levels within one hour and detectable levels (0.07 µg/mL) in serum beyond 3 days. However, lung concentrations of tilmicosin remained above the tilmicosin MIC (95% of 3.12 µg/mL) for Mannheimia (Pasteurella) haemolytica for at least three days following the single injection. Serum tilmicosin levels are a poor indicator of total body tilmicosin. The lung/serum tilmicosin ratio in favour of lung tissue appeared to equilibrate by three days post injection at approximately 60. In a study with radioactive tilmicosin, 24% and 68% of the dose was recovered from urine and feces respectively over 21 days.

Micotil Indications

Micotil is indicated for the treatment of bovine respiratory disease (BRD) associated with Mannheimia (Pasteurella) haemolytica and Pasteurella multocida and for the reduction of morbidity associated with bovine respiratory disease (BRD) in feedlot calves, caused by Mannheimia (Pasteurella) haemolytica and Pasteurella multocida, during the first 30 days in the feedlot, when administered at the time of arrival. Micotil is indicated for the treatment of pneumonic pasteurellosis in lambs associated with Mannheimia (Pasteurella) haemolytica.

DOSAGE AND ADMINISTRATION: INJECT SUBCUTANEOUSLY IN CATTLE. INJECT SUBCUTANEOUSLY IN LAMBS GREATER THAN 15 KG BODY WEIGHT ONLY. Administer a single subcutaneous injection of 10 mg tilmicosin/kg body weight (1 mL per 30 kg/1.5 mL per 100 lbs.). Do not inject more than 25 mL per injection site.

If no improvement is noted within 48 hours, the diagnosis should be reconfirmed.

NOTE: Swelling at the subcutaneous site of injection may be observed but is transient and usually mild.

Warning

Treated cattle must not be slaughtered for use in food for at least 28 days after latest treatment with this drug. Do not use in lactating dairy cattle.

Treated sheep must not be slaughtered for use in food for at least 36 days after latest treatment with this drug.

CONTRAINDICATION: DO NOT ADMINISTER INTRAVENOUSLY. INTRAVENOUS INJECTION IN CATTLE AND LAMBS HAS BEEN FATAL.

CAUTION: DO NOT ADMINISTER TO SWINE. INJECTION OF TILMICOSIN IN SWINE HAS BEEN FATAL.

HUMAN WARNING: Not for human use. Human injection has been associated with fatalities. Do not use in automatically powered syringes. Exercise caution to avoid accidental self-injection. In case of human injection, consult a physician immediately and apply ice or cold pack to injection site. Do not apply ice directly to skin. For emergency medical information call 1-416-813-5900.

KEEP OUT OF REACH OF CHILDREN. AVOID CONTACT WITH EYES.

NOTE TO PHYSICIAN: The cardiovascular system is the target of toxicity and should be monitored closely. Cardiovascular toxicity may be due to calcium channel blockade. In dogs, administration of intravenous calcium offset Micotil-induced tachycardia and negative inotropy (decreased contractility) within approximately 20 minutes. Dobutamine dose-dependently partially offset the negative inotropic effects induced by Micotil in dogs, but did not have an effect on the increased heart rate caused by Micotil. β-adrenergic antagonists, such as propranolol, exacerbated the negative inotropy of Micotil in dogs. Epinephrine potentiated lethality of Micotil in pigs. Epinephrine is contraindicated. This antibiotic persists in tissues for several days.

HOW SUPPLIED: Micotil is supplied in multidose amber bottles containing 300 mg of tilmicosin activity per mL.

Storage: Store at 30° C (86° F) or below. Protect from direct sunlight.

*ELANCO®, Micotil®, and the diagonal colour bar are trademarks of Eli Lilly and Company.

ELANCO® Division Eli Lilly Canada Inc. is an authorized user.

Elanco®, Division Eli Lilly Canada Inc., 150 Research Lane, Suite 120, Guelph, Ontario N1G 4T2 Canada

Net

 

100 mL

9/3/2009

250 mL

9/3/2009

NAC No.: 11840244

ELANCO ANIMAL HEALTH
Division Eli Lilly Canada Inc.

RESEARCH PARK CENTRE, 150 RESEARCH LANE, SUITE 120, GUELPH, ON, N1G 4T2
Telephone:   519-821-0277
Order Desk:   800-773-7603
Fax:   519-821-7831
Website:   www.Elanco.ca
Every effort has been made to ensure the accuracy of the Micotil 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: 2014-09-05

(web4)