NURSING MOTHERS SECTION.

Nursing Mothers. Lincomycin has been reported to appear in human milk in concentrations of 0.5 to 2.4 mcg/mL. Because of the potential for serious adverse reactions in nursing infants from lincomycin injection, decision should be made whether to discontinue nursing, or to discontinue the drug, taking into account the importance of the drug to the mother.

OVERDOSAGE SECTION.

OVERDOSAGE. Serum concentrations of lincomycin are not appreciably affected by hemodialysis and peritoneal dialysis.

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL.

PACKAGE LABEL PRINCIPAL DISPLAY PANEL Vial LabelNDC 25021-193-02Rx onlyLincomycin Injection, USP600 mg per mL(300 mg per mL)2 mL Multi-Dose VialFor Intramuscular or Intravenous Use. PACKAGE LABEL PRINCIPAL DISPLAY PANEL Vial Label.

PEDIATRIC USE SECTION.

Pediatric Use. Lincomycin injection contains benzyl alcohol as preservative. Benzyl alcohol has been associated with fatal Gasping Syndrome in premature infants (see WARNINGS). Safety and effectiveness in pediatric patients below the age of one month have not been established (see DOSAGE AND ADMINISTRATION).

PRECAUTIONS SECTION.

PRECAUTIONS. General. Review of experience to date suggests that subgroup of older patients with associated severe illness may tolerate diarrhea less well. When lincomycin injection is indicated in these patients, they should be carefully monitored for change in bowel frequency.Lincomycin injection should be prescribed with caution in individuals with history of gastrointestinal disease, particularly colitis.Lincomycin injection should be used with caution in patients with history of asthma or significant allergies.Certain infections may require incision and drainage or other indicated surgical procedures in addition to antibacterial therapy.The use of lincomycin injection may result in overgrowth of nonsusceptible organisms, particularly yeasts. Should superinfections occur, appropriate measures should be taken as indicated by the clinical situation. When patients with pre-existing Candida infections require therapy with lincomycin injection, concomitant antifungal treatment should be given.The serum half-life of lincomycin may be prolonged in patients with severe renal impairment compared to patients with normal renal function. In patients with hepatic impairment, serum half-life may be twofold longer than in patients with normal hepatic function.Patients with severe renal impairment and/or hepatic impairment should be dosed with caution and serum lincomycin concentrations monitored during high-dose therapy (see DOSAGE AND ADMINISTRATION).Lincomycin MUST be diluted prior to intravenous infusion. For intravenous infusion, infuse over at least 60 minutes as directed in the DOSAGE AND ADMINISTRATION Section. Do NOT administer as an intravenous bolus. Severe cardiopulmonary reactions have occurred at greater than the recommended concentration and rate.Prescribing lincomycin injection in the absence of proven or strongly suspected bacterial infection or prophylactic indication is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria.. 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 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 common problem caused by antibacterial which usually ends when the antibacterial is discontinued. Sometimes after starting treatment with an antibacterial, patients can develop watery and bloody stools (with or without stomach cramps and fever) even as late as two or more months after taking the last dose of the antibacterial. If this occurs, patients should contact their physician as soon as possible.. Laboratory Tests. During prolonged therapy with lincomycin injection, periodic liver and kidney function tests and blood counts should be performed.. 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 with caution in patients receiving such agents.. Carcinogenesis, Mutagenesis, Impairment of Fertility. The carcinogenic potential of lincomycin has not been evaluated.Lincomycin was not found to be mutagenic in the Ames Salmonella reversion assay or the V79 Chinese hamster lung cells at the HGPRT locus. It did not induce DNA strand breaks in V79 Chinese hamster lung cells as measured by alkaline elution or chromosomal abnormalities in cultured human lymphocytes. In vivo, lincomycin was negative in both the rat and mouse micronucleus assays and it did not induce sex-linked recessive lethal mutations in the offspring of male Drosophila. However, lincomycin did cause unscheduled DNA syntheses in freshly isolated rat hepatocytes.Impairment of fertility was not observed in male or female rats given oral 300 mg/kg doses of lincomycin (0.36 times the highest recommended human dose based on mg/m2).. Pregnancy. There are no adequate and well-controlled studies in pregnant women. Lincomycin injection Sterile Solution contains benzyl alcohol as preservative. Benzyl alcohol can cross the placenta (see WARNINGS). Lincomycin injection should be used during pregnancy only if clearly needed.. Teratogenic Effects:. In study with 60 pregnant women, cord serum concentrations were approximately 25% of the maternal serum concentrations, indicating that lincomycin crosses the placenta, and no substantial accumulation occurred in the amniotic fluid. Experience with 345 obstetrical patients receiving lincomycin injection revealed no ill effects related to pregnancy.There was no evidence of teratogenicity when lincomycin was administered in diet to pregnant Sprague Dawley rats during the period of major organogenesis at doses up to 5000 mg/kg (approximately times the maximum recommended human dose [MRHD], respectively, based on body surface area comparison).. Nonteratogenic Effects:. Reproduction studies performed in rats administered oral lincomycin in diet for weeks prior to mating, throughout pregnancy and lactation, revealed no adverse effects on survival of offspring from birth to weaning at doses up to 1000 mg/kg (1.2 times the MRHD based on body surface area comparison) up to generations.. Nursing Mothers. Lincomycin has been reported to appear in human milk in concentrations of 0.5 to 2.4 mcg/mL. Because of the potential for serious adverse reactions in nursing infants from lincomycin injection, decision should be made whether to discontinue nursing, or to discontinue the drug, taking into account the importance of the drug to the mother.. Pediatric Use. Lincomycin injection contains benzyl alcohol as preservative. Benzyl alcohol has been associated with fatal Gasping Syndrome in premature infants (see WARNINGS). Safety and effectiveness in pediatric patients below the age of one month have not been established (see DOSAGE AND ADMINISTRATION).

ADVERSE REACTIONS SECTION.

ADVERSE REACTIONS. The following adverse reactions have been reported with the use of lincomycin.Gastrointestinal disordersDiarrhea, nausea, vomiting, glossitis, stomatitis, abdominal pain, abdominal discomfort+, anal pruritusSkin and subcutaneous tissue disordersToxic epidermal necrolysis, Stevens-Johnson syndrome, acute generalized exanthematous pustulosis, dermatitis bullous, dermatitis exfoliative, erythema multiforme (see WARNINGS), rash, urticaria, pruritusInfections and infestationsVaginal infection, pseudomembranous colitis, Clostridioides difficile colitis (see WARNINGS)Blood and lymphatic system disordersPancytopenia, agranulocytosis, aplastic anemia, leukopenia, neutropenia, thrombocytopenic purpuraImmune system disordersAnaphylactic reaction (see WARNINGS), angioedema, serum sicknessHepatobiliary disordersJaundice, liver function test abnormal, transaminases increasedRenal and urinary disordersRenal impairment, oliguria, proteinuria, azotemiaCardiac disordersCardio-respiratory arrest (see DOSAGE AND ADMINISTRATION)Vascular disordersHypotension (see DOSAGE AND ADMINISTRATION), thrombophlebitis+ Ear and labyrinth disordersVertigo, tinnitusNeurologic disordersHeadache, dizziness, somnolenceGeneral disorders and administration site conditionsInjection 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 Sagent Pharmaceuticals, Inc. at 1-866-625-1618 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

ANIMAL PHARMACOLOGY & OR TOXICOLOGY SECTION.

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

BOXED WARNING SECTION.

WARNING. Clostridioides difficile associated diarrhea (CDAD) has been reported with use of nearly all antibacterial agents, including lincomycin injection and may range in severity from mild diarrhea to fatal colitis. Treatment with antibacterial agents alters the normal flora of the colon leading to overgrowth of C. difficile. Because lincomycin therapy has been associated with severe colitis which may end fatally, it should be reserved for serious infections where less toxic antimicrobial agents are inappropriate, as described in the INDICATIONS AND USAGE section. It should not be used in patients with nonbacterial infections such as most upper respiratory tract infections.C. diffficile produces toxins and which contribute to the development of CDAD. Hypertoxin producing strains of C. difficile cause increased morbidity and mortality, as these infections can be refractory to antimicrobial therapy and may require colectomy. CDAD must be considered in all patients who present with diarrhea following antibacterial use. Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents.If CDAD is suspected or confirmed, ongoing antibacterial use not directed against C. difficile may need to be discontinued. Appropriate fluid and electrolyte management, protein supplementation, antibacterial treatment of C. difficile, and surgical evaluation should be instituted as clinically indicated.

CARCINOGENESIS & MUTAGENESIS & IMPAIRMENT OF FERTILITY SECTION.

Carcinogenesis, Mutagenesis, Impairment of Fertility. The carcinogenic potential of lincomycin has not been evaluated.Lincomycin was not found to be mutagenic in the Ames Salmonella reversion assay or the V79 Chinese hamster lung cells at the HGPRT locus. It did not induce DNA strand breaks in V79 Chinese hamster lung cells as measured by alkaline elution or chromosomal abnormalities in cultured human lymphocytes. In vivo, lincomycin was negative in both the rat and mouse micronucleus assays and it did not induce sex-linked recessive lethal mutations in the offspring of male Drosophila. However, lincomycin did cause unscheduled DNA syntheses in freshly isolated rat hepatocytes.Impairment of fertility was not observed in male or female rats given oral 300 mg/kg doses of lincomycin (0.36 times the highest recommended human dose based on mg/m2).

CLINICAL PHARMACOLOGY SECTION.

CLINICAL PHARMACOLOGY. Intramuscular administration of single dose of 600 mg of lincomycin produces average peak serum concentrations of 11.6 mcg/mL at 60 minutes and maintains therapeutic concentrations 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 concentrations of 15.9 mcg/mL and maintains therapeutic concentrations 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 renal impairment compared to patients with normal renal function. In patients with hepatic impairment, 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 distribution studies indicate that bile is an important route of excretion. Significant concentrations have been demonstrated in most body tissues. Although lincomycin appears to diffuse into cerebrospinal fluid (CSF), concentrations of lincomycin in the CSF appear inadequate for the treatment of meningitis.

CONTRAINDICATIONS SECTION.

CONTRAINDICATIONS. Lincomycin injection is contraindicated in patients previously found to be hypersensitive to lincomycin or clindamycin.

DESCRIPTION SECTION.

DESCRIPTION. Lincomycin Injection, USP is sterile solution containing lincomycin hydrochloride which is the monohydrated salt of lincomycin, lincosamide antibacterial produced by the growth of 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--D-galacto-octopyranoside monohydrochloride monohydrate. The molecular formula of lincomycin hydrochloride is C18H34N2O6S.HCl.H2O and the molecular weight is 461.01.The structural formula is represented below:Lincomycin hydrochloride is white or practically white, crystalline powder and is odorless or has 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.Lincomycin Injection, USP contains lincomycin hydrochloride in sterile, clear, colorless solution with benzyl alcohol used as preservative 9.45 mg per mL, and water for injection.Lincomycin Injection, USP is sterile solution for intramuscular and intravenous use. Lincomycin Injection, USP is supplied in mL and 10 mL multiple-dose vials containing 300 mg per mL of lincomycin (equivalent to 340 mg per mL of lincomycin hydrochloride, USP).. Figure.

DOSAGE & ADMINISTRATION SECTION.

DOSAGE AND ADMINISTRATION. If significant diarrhea occurs during therapy, lincomycin injection 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 month of age: Serious infections--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 gram are given every 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 grams have been given. Intravenous doses are given on the basis of gram of lincomycin diluted in not less than 100 mL of appropriate solution (see PHYSICAL COMPATIBILITIES) and infused over period of not less than one hour.DoseVol. DiluentTime600 mg100 mL1 hr1 gram100 mL1 hr2 grams200 mL2 hr3 grams300 mL3 hr4 grams400 mL4 hrThese doses may be repeated as often as required to the limit of the maximum recommended daily dose of grams of lincomycin.Pediatric patients over 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 lincomycin injection has been given at greater than the recommended concentration and rate (see PRECAUTIONS).SUBCONJUNCTIVAL INJECTION--0.25 mL (75 mg) injected subconjunctivally will result in ocular fluid concentrations of antibacterial (lasting for at least hours) sufficient for most susceptible pathogens.. Patients with Renal Impairment. 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 (see PRECAUTIONS).Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.

DRUG INTERACTIONS SECTION.

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 with caution in patients receiving such agents.

GENERAL PRECAUTIONS SECTION.

General. Review of experience to date suggests that subgroup of older patients with associated severe illness may tolerate diarrhea less well. When lincomycin injection is indicated in these patients, they should be carefully monitored for change in bowel frequency.Lincomycin injection should be prescribed with caution in individuals with history of gastrointestinal disease, particularly colitis.Lincomycin injection should be used with caution in patients with history of asthma or significant allergies.Certain infections may require incision and drainage or other indicated surgical procedures in addition to antibacterial therapy.The use of lincomycin injection may result in overgrowth of nonsusceptible organisms, particularly yeasts. Should superinfections occur, appropriate measures should be taken as indicated by the clinical situation. When patients with pre-existing Candida infections require therapy with lincomycin injection, concomitant antifungal treatment should be given.The serum half-life of lincomycin may be prolonged in patients with severe renal impairment compared to patients with normal renal function. In patients with hepatic impairment, serum half-life may be twofold longer than in patients with normal hepatic function.Patients with severe renal impairment and/or hepatic impairment should be dosed with caution and serum lincomycin concentrations monitored during high-dose therapy (see DOSAGE AND ADMINISTRATION).Lincomycin MUST be diluted prior to intravenous infusion. For intravenous infusion, infuse over at least 60 minutes as directed in the DOSAGE AND ADMINISTRATION Section. Do NOT administer as an intravenous bolus. Severe cardiopulmonary reactions have occurred at greater than the recommended concentration and rate.Prescribing lincomycin injection in the absence of proven or strongly suspected bacterial infection or prophylactic indication is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria.

HOW SUPPLIED SECTION.

HOW SUPPLIED. Lincomycin Injection, USP is available as sterile, clear, and colorless solution in the following strength and package sizes:NDCLincomycin Injection, USP (300 mg per mL)Package Factor25021-193-02600 mg per mL Multi-Dose Vial10 vials per carton25021-193-103,000 mg per 10 mL Multi-Dose Vial10 vials per cartonEach mL of Lincomycin Injection, USP contains 300 mg lincomycin (equivalent to 340 mg lincomycin hydrochloride, USP); also benzyl alcohol, 9.45 mg added as preservative.. Storage Conditions. Store at 20 to 25C (68 to 77F). [See USP Controlled Room Temperature.]Sterile, Nonpyrogenic.The container closure is not made with natural rubber latex.

INDICATIONS & USAGE SECTION.

INDICATIONS AND USAGE. Lincomycin injection 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, 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.Lincomycin injection may be administered concomitantly with other antimicrobial agents when indicated.Lincomycin injection 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.

INFORMATION FOR PATIENTS SECTION.

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 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 common problem caused by antibacterial which usually ends when the antibacterial is discontinued. Sometimes after starting treatment with an antibacterial, patients can develop watery and bloody stools (with or without stomach cramps and fever) even as late as two or more months after taking the last dose of the antibacterial. If this occurs, patients should contact their physician as soon as possible.

LABORATORY TESTS SECTION.

Laboratory Tests. During prolonged therapy with lincomycin injection, periodic liver and kidney function tests and blood counts should be performed.

MECHANISM OF ACTION SECTION.

Mechanism of Action. Lincomycin inhibits bacterial protein synthesis by binding to the 23S RNA of the 50S subunit of the bacterial ribosome. Lincomycin is predominantly bacteriostatic in vitro.

MICROBIOLOGY SECTION.

Microbiology:. Mechanism of Action. Lincomycin inhibits bacterial protein synthesis by binding to the 23S RNA of the 50S subunit of the bacterial ribosome. Lincomycin is predominantly bacteriostatic in vitro.. Resistance. 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 (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.. Antimicrobial Activity. Lincomycin has been shown to be active against most strains of the following bacteria both in vitro and in clinical infections: (see INDICATIONS AND USAGE). Staphylococcus aureus Streptococcus pneumoniaeThe 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 lincomycin injection 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 streptococciAnaerobic bacteria: Clostridium tetani Clostridium perfringens Staphylococcus aureus. Streptococcus pneumoniae. Susceptibility Testing. For specific information regarding susceptibility test interpretive criteria and associated test methods and quality control standards recognized by FDA for this drug, please see: https://www.fda.gov/STIC.

NONTERATOGENIC EFFECTS SECTION.

Nonteratogenic Effects:. Reproduction studies performed in rats administered oral lincomycin in diet for weeks prior to mating, throughout pregnancy and lactation, revealed no adverse effects on survival of offspring from birth to weaning at doses up to 1000 mg/kg (1.2 times the MRHD based on body surface area comparison) up to generations.

PREGNANCY SECTION.

Pregnancy. There are no adequate and well-controlled studies in pregnant women. Lincomycin injection Sterile Solution contains benzyl alcohol as preservative. Benzyl alcohol can cross the placenta (see WARNINGS). Lincomycin injection should be used during pregnancy only if clearly needed.. Teratogenic Effects:. In study with 60 pregnant women, cord serum concentrations were approximately 25% of the maternal serum concentrations, indicating that lincomycin crosses the placenta, and no substantial accumulation occurred in the amniotic fluid. Experience with 345 obstetrical patients receiving lincomycin injection revealed no ill effects related to pregnancy.There was no evidence of teratogenicity when lincomycin was administered in diet to pregnant Sprague Dawley rats during the period of major organogenesis at doses up to 5000 mg/kg (approximately times the maximum recommended human dose [MRHD], respectively, based on body surface area comparison).. Nonteratogenic Effects:. Reproduction studies performed in rats administered oral lincomycin in diet for weeks prior to mating, throughout pregnancy and lactation, revealed no adverse effects on survival of offspring from birth to weaning at doses up to 1000 mg/kg (1.2 times the MRHD based on body surface area comparison) up to generations.

RENAL IMPAIRMENT SUBSECTION.

Patients with Renal Impairment. 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 (see PRECAUTIONS).Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.

SPL UNCLASSIFIED SECTION.

Sterile Solution for Intramuscular or Intravenous UseSAGENT(R) Rx onlyTo 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 bacteria.

STORAGE AND HANDLING SECTION.

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

TERATOGENIC EFFECTS SECTION.

Teratogenic Effects:. In study with 60 pregnant women, cord serum concentrations were approximately 25% of the maternal serum concentrations, indicating that lincomycin crosses the placenta, and no substantial accumulation occurred in the amniotic fluid. Experience with 345 obstetrical patients receiving lincomycin injection revealed no ill effects related to pregnancy.There was no evidence of teratogenicity when lincomycin was administered in diet to pregnant Sprague Dawley rats during the period of major organogenesis at doses up to 5000 mg/kg (approximately times the maximum recommended human dose [MRHD], respectively, based on body surface area comparison).

WARNINGS SECTION.

WARNINGS. (See BOXED WARNING).. Clostridioides difficile associated diarrhea. Clostridioides difficile associated diarrhea (CDAD) has been reported with use of nearly all antibacterial agents, including Lincomycin, and may range in severity from mild diarrhea to fatal colitis. Treatment with antibacterial agents alters the normal flora of the colon leading to overgrowth of C. difficile.C. difficile produces toxins and which contribute to the development of CDAD. Hypertoxin producing strains of C. difficile cause increased morbidity and mortality, as these infections can be refractory to antimicrobial therapy and may require colectomy. CDAD must be considered in all patients who present with diarrhea following antibacterial use. Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents.If CDAD is suspected or confirmed, ongoing antibacterial use not directed against C. difficile may need to be discontinued. Appropriate fluid and electrolyte management, protein supplementation, antibacterial treatment of C. difficile, and surgical evaluation should be instituted as clinically indicated.. Hypersensitivity. Severe hypersensitivity reactions, including anaphylactic reactions and severe cutaneous adverse reactions (SCAR) such as Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), acute generalized exanthematous pustulosis (AGEP), and erythema multiforme (EM) have been reported in patients receiving lincomycin injection therapy. If an anaphylactic reaction or severe skin reaction occurs, lincomycin injection should be discontinued and appropriate therapy should be initiated (see ADVERSE REACTIONS).. Benzyl Alcohol Toxicity in Pediatric Patients (Gasping Syndrome). Lincomycin injection contains benzyl alcohol as preservative.The preservative benzyl alcohol has been associated with serious adverse events, including the gasping syndrome, and death in pediatric patients. Although normal therapeutic doses of this product ordinarily deliver amounts of benzyl alcohol that are substantially lower than those reported in association with the gasping syndrome, the minimum amount of benzyl alcohol at which toxicity may occur is not known. The risk of benzyl alcohol toxicity depends on the quantity administered and the liver and kidneys capacity to detoxify the chemical. Premature and low-birth weight infants may be more likely to develop toxicity.. Inadequate for Use in Meningitis. Although lincomycin appears to diffuse into cerebrospinal fluid, concentrations of lincomycin in the CSF may be inadequate for the treatment of meningitis.