July 28, 2016
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"By Megan Brooks
Medscape Medical News

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Intramuscular administration of a single dose of 600 mg of lincomycin produces average peak serum levels of 11.6 μg/mL at 60 minutes and maintains therapeutic levels for 17 to 20 hours for most susceptible gram-positive organisms. Urinary excretion after this dose ranges from 1.8 to 24.8 percent (mean: 17.3 percent).

A two hour intravenous infusion of 600 mg of lincomycin achieves average peak serum levels of 15.9 μg/mL and yields therapeutic levels for 14 hours for most susceptible gram-positive organisms. Urinary excretion ranges from 4.9 to 30.3 percent (mean: 13.8 percent).

The biological half-life after intramuscular or intravenous administration is 5.4 ± 1.0 hours. The serum half-life of lincomycin may be prolonged in patients with severe impairment of renal function compared to patients with normal renal function. In patients with abnormal hepatic function, serum half-life may be twofold longer than in patients with normal hepatic function. Hemodialysis and peritoneal dialysis are not effective in removing lincomycin from the serum.

Tissue level studies indicate that bile is an important route of excretion. Significant levels have been demonstrated in the majority of body tissues. Although lincomycin appears to diffuse into cerebrospinal fluid (CSF), levels of lincomycin in the CSF appear inadequate for the treatment of meningitis.


Lincomycin has been shown to be active against most strains of the following organisms both in vitro and in clinical infections: (see INDICATIONS AND USAGE).

Staphylococcus aureus
Streptococcus pneumoniae

The following in vitro data are available; but their clinical significance is unknown.

Lincomycin has been shown to be active in vitro against the following microorganisms; however, the safety and efficacy of LINCOCIN in treating clinical infections due to these organisms have not been established in adequate and well controlled trials.

Gram-positive Bacteria

Corynebacterium diphtheriae
Streptococcus pyogenes
Viridans group streptococci

Anaerobic Bacteria

Clostridium tetani
Clostridium perfringens

Cross resistance has been demonstrated between clindamycin and lincomycin. Resistance is most often due to methylation of specific nucleotides in the 23S RNA of the 50S ribosomal subunit, which can determine cross resistance to macrolides and streptogramins B (MLSB phenotype). Macrolide-resistant isolates of these organisms should be tested for inducible resistance to lincomycin/clindamycin using the D-zone test or other appropriate method.

There are currently no antimicrobial susceptibility testing (AST) interpretive criteria for LINCOCIN

Animal Pharmacology

In vivo experimental animal studies demonstrated the effectiveness of LINCOCIN preparations (lincomycin) in protecting animals infected with Streptococcus viridans, β-hemolytic Streptococcus, Staphylococcus aureus, Diplococcus pneumoniae and Leptospira pomona. It was ineffective in Klebsiella, Pasteurella, Pseudomonas, Salmonella and Shigella infections.

Clinical Studies

Experience with 345 obstetrical patients receiving this drug revealed no ill effects related to pregnancy. (See PRECAUTIONS, Pregnancy)

Last reviewed on RxList: 10/31/2014
This monograph has been modified to include the generic and brand name in many instances.

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