LINCOMYCIN

Lincomycin Injection, USP sterile solution contains lincomycin hydrochloride which is the monohydrated salt of lincomycin, a substance produced by the growth of a member of the lincolnensis group of Streptomyces lincolnensis (Fam. Streptomycetaceae). The chemical name for lincomycin hydrochloride is Methyl 6,8-dideoxy-6-(1-methyl-trans-4-propyl-L-2- pyrolidinecarboxamido)-1-thio-D-erythro-α-D-galacto-octopyranoside monohydrochloride monohydrate. The molecular formula of lincomycin hydrochloride is C 18 H34N 2 O 6 S●HCl●H 2 O and the molecular weight is 461.01. The structural formula is represented below: Lincomycin hydrochloride is a white or practically white, crystalline powder and is odorless or has a faint odor. Its solutions are acid and are dextrorotatory. Lincomycin hydrochloride is freely soluble in water; soluble in dimethylformamide and very slightly soluble in acetone. Each mL contains lincomycin hydrochloride equivalent to 300 mg lincomycin. Also contains 9.45 mg benzyl alcohol added as a preservative. Structure-Lincomycin Injection

Lincomycin Injection sterile solution is indicated in the treatment of serious infections due to susceptible strains of streptococci, pneumococci, and staphylococci. Its use should be reserved for penicillin-allergic patients or other patients for whom, in the judgment of the physician, a penicillin is inappropriate. Because of the risk of CDAD, as described in the BOXED WARNING , before selecting lincomycin the physician should consider the nature of the infection and the suitability of other alternatives. Indicated surgical procedures should be performed in conjunction with antibacterial therapy. The drug may be administered concomitantly with other antimicrobial agents when indicated. Lincomycin is not indicated in the treatment of minor bacterial infections or viral infections. To reduce the development of drug-resistant bacteria and maintain the effectiveness of Lincomycin Injection and other antibacterial drugs, Lincomycin Injection should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.

If significant diarrhea occurs during therapy, this antibacterial should be discontinued (see BOXED WARNING ). INTRAMUSCULAR Adults: Serious infections —600 mg (2 mL) intramuscularly every 24 hours. More severe infections —600 mg (2 mL) intramuscularly every 12 hours or more often. Pediatric patients over 1 month of age: Serious infection s—one intramuscular injection of 10 mg/kg (5 mg/lb) every 24 hours. More severe infections —one intramuscular injection of 10 mg/kg (5 mg/lb) every 12 hours or more often. INTRAVENOUS Adults: The intravenous dose will be determined by the severity of the infection. For serious infections doses of 600 mg of lincomycin (2 mL of lincomycin injection) to 1 gram are given every 8 to 12 hours. For more severe infections these doses may have to be increased. In life- threatening situations daily intravenous doses of as much as 8 grams have been given. Intravenous doses are given on the basis of 1 gram of lincomycin diluted in not less than 100 mL of appropriate solution (see PHYSICAL COMPATIBILITIES) and infused over a period of not less than one hour. Dose Vol. Diluent Time 600 mg 100 mL 1 hr 1 gram 100 mL 1 hr 2 grams 200 mL 2 hr 3 grams 300 mL 3 hr 4 grams 400 mL 4 hr These doses may be repeated as often as required to the limit of the maximum recommended daily dose of 8 grams of lincomycin. Pediatric patients over 1 month of age: 10 to 20 mg/kg/day (5 to 10 mg/lb/day) depending on the severity of the infection may be infused in divided doses as described above for adults NOTE: Severe cardiopulmonary reactions have occurred when this drug has been given at greater than the recommended concentration and rate. SUBCONJUNCTIVAL INJECTION 0.25 mL (75 mg) injected subconjunctivally will result in ocular fluid concentrations of antibacterial (lasting for at least 5 hours) sufficient for most susceptible pathogens. Patients with diminished renal function: When therapy with lincomycin injection is required in individuals with severe renal impairment, an appropriate dose is 25 to 30% of that recommended for patients with normally functioning kidneys.

This drug is contraindicated in patients previously found to be hypersensitive to lincomycin or clindamycin

The following adverse reactions have been reported with the use of lincomycin. Gastrointestinal disorders Diarrhea, nausea, vomiting, glossitis, stomatitis, abdominal pain, abdominal discomfort†, anal pruritus Skin and subcutaneous tissue disorders Toxic epidermal necrolysis, Stevens-Johnson syndrome, acute generalized exanthematous pustulosis, dermatitis bullous, dermatitis exfoliative, erythema multiforme (see WARNINGS ), rash, urticaria, pruritus Infections and infestations Vaginal infection, pseudomembranous colitis, Clostridium difficile colitis (see WARNINGS ) Blood and lymphatic system disorders Pancytopenia, agranulocytosis, aplastic anemia, leukopenia, neutropenia, thrombocytopenic purpura Immune system disorders Anaphylactic reaction (see WARNINGS ), angioedema, serum sickness Hepatobiliary disorders Jaundice, liver function test abnormal, transaminases increased Renal and urinary disorders Renal impairment, oliguria, proteinuria, azotemia Cardiac disorders Cardio-respiratory arrest (see DOSAGE AND ADMINISTRATION ) Vascular disorders Hypotension (see DOSAGE AND ADMINISTRATION ), thrombophlebitis † Ear and labyrinth disorders Vertigo, tinnitus Neurologic disorders Headache, dizziness, somnolence General disorders and administration site conditions Injection site abscess sterile‡, injection site induration‡, injection site pain‡, injection site irritation‡ †Event has been reported with intravenous injection. ‡Reported with intramuscular injection. To report SUSPECTED ADVERSE REACTIONS, contact PAI Pharma at 1-800-845-8210 or FDA at 1-800-FDA-1088 or www.fda.gov/ medwatch.

Information for Patients Patients should be counseled that antibacterial drugs including lincomycin injection should only be used to treat bacterial infections. They do not treat viral infections (e.g., the common cold). When lincomycin injection is prescribed to treat a bacterial infection, patients should be told that although it is common to feel better early in the course of therapy, the medication should be taken exactly as directed. Skipping doses or not completing the full course of therapy may (1) decrease the effectiveness of the immediate treatment and (2) increase the likelihood that bacteria will develop resistance and will not be treatable by lincomycin injection or other antibacterial drugs in the future. Diarrhea is a common problem caused by antibacterial which usually ends when the antibacterial is discontinued. Sometimes after starting treatment with antibacterial, patients can develop watery and bloody stools (with or without stomach cramps and fever) even as late as two or more months after having taken the last dose of the antibacterial. If this occurs, patients should contact their physician as soon as possible. Drug Interactions Lincomycin has been shown to have neuromuscular blocking properties that may enhance the action of other neuromuscular blocking agents. Therefore, it should be used in caution in patients receiving such agents.

Storage Conditions Store at 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature.] Sterile, Nonpyrogenic. The container closure is not made with natural rubber latex.