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Clinical efficacy and tolerability of linezolid in pediatric patients: a systematic review
Elena Chiappini1, Camilla Conti, Luisa Galli
1Department of Pediatrics, University of Florence, Florence, Italy.
Insights
Linezolid demonstrates high clinical cure rates in pediatric patients for skin, bacteremia, and pneumonia infections, comparable to vancomycin or cefadroxil. Further research is needed to confirm long-term efficacy and tolerability in children.
Area of Science:
- Pediatric Infectious Diseases
- Pharmacology
- Clinical Trials
Background:
- Linezolid is approved for severe gram-positive bacterial infections in adults.
- Limited data exists on linezolid's use in pediatric populations.
Purpose of the Study:
- To review evidence on linezolid's efficacy and tolerability in infants and children.
- To summarize clinical data for pediatric linezolid use.
Main Methods:
- Conducted a literature search of major databases (Cochrane, EMBASE, MEDLINE) up to July 2009.
- Included pharmacokinetic studies, case reports, and randomized clinical trials (RCTs) in children.
- Excluded non-pertinent articles and evaluated bibliographies of relevant studies.
Main Results:
- Analyzed 47 publications involving 447 children for pharmacokinetics and 1480 children for efficacy in RCTs.
- Found age-dependent plasma pharmacokinetics of linezolid in pediatric patients.
- Reported high clinical cure rates (75.0%-93.2%) for skin infections, bacteremia, or pneumonia, with no significant difference compared to vancomycin or cefadroxil.
- Identified diarrhea, nausea/vomiting, and thrombocytopenia as common adverse events; 3 cases of neuropathy reported.
Conclusions:
- Linezolid shows high clinical cure rates in pediatric skin infections, bacteremia, and pneumonia, similar to comparator antibiotics.
- Further RCTs are needed for other infections (e.g., osteomyelitis, endocarditis) and long-term outcomes.
- Ongoing monitoring for adverse events and potential resistance is crucial in pediatric patients.
Background:
Linezolid is marketed for the treatment of severe, vancomycin-resistant infections with gram-positive bacteria in adults. Most information regarding the pharmacokinetic profile, efficacy, and tolerability of linezolid is derived from adult studies.
Objective:
The aim of this review was to summarize evidence regarding the use of linezolid in infants and children, focusing on the drug's clinical efficacy data and tolerability profile.
Methods:
A literature search was conducted of the Cochrane Library, EMBASE, and MEDLINE databases, from their inception through July 20, 2009, using the following terms: linezolid, newborn, infant, child, pediatrics, adolescent, human, clinical trial, and case report. Articles were excluded if they were redundant or not pertinent. (Articles that did not focus on the use of linezolid in children were considered not pertinent.) Bibliographies of all relevant articles were also evaluated.
Results:
Forty-seven publications regarding the use of linezolid in children were included in the review: 5 pharmacokinetic studies, 32 case reports, 6 randomized clinical trials (RCTs), 2 uncontrolled trials, 1 subanalysis of 2 published RCTs, and 1 subanalysis of published data about linezolid's tolerability. Pharmacokinetic data on linezolid use in children were derived from studies that enrolled 447 children. Plasma pharmacokinetics of linezolid in pediatric patients were found to be age dependent. Results from 6 vancomycinor cefadroxil-controlled RCTs (including 1480 children) evaluating linezolid treatment in children reported variable clinical cure rates, ranging from 75.0% to 93.2% in children with skin and skin-structure infections and from 77.5% to 90.0% in children with bacteremia or pneumonia. No significant difference in clinical cure rates between the linezolid group and the comparator group was observed in any study. The most frequently reported adverse events were diarrhea (from 3.1% to 16.8%), nausea and/or vomiting (from 2.9% to 11.9%), and thrombocytopenia (from 1.9% to 4.7%). To date, 3 cases of neuropathy have been described in children.
Conclusions:
The reviewed pediatric studies in skin and skin-structure infections, bacteremia, or pneumonia found that linezolid was associated with high clinical cure rates (75.0%-93.2%) that did not differ significantly from those of vancomycin or cefadroxil. RCTs enrolling children with other types of infection (eg, osteomyelitis, endocarditis), as well as long-term studies, are needed to draw definitive conclusions about linezolid's efficacy and tolerability in pediatric patients. Careful monitoring for adverse events and possible linezolid resistance continues to be essential.
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