Lidocaine + prilocaine before 3 months of age: new indication. Correct use is crucial

    Prescrire International
    |September 30, 2000
    PubMed

    Insights

    Lidocaine and prilocaine cream is now approved for infants 0-3 months for skin anesthesia. While effective for circumcision pain compared to placebo, its efficacy is less than other methods for newborn procedures like heel pricks and venipuncture.

    Area of Science:

    • Pediatric Anesthesiology
    • Dermatology
    • Pharmacology

    Background:

    • Lidocaine and prilocaine combination was previously contraindicated for infants aged 0-3 months.
    • Recent clinical data supports its use in this age group for skin anesthesia.
    • Methodological quality of the clinical file for this age range is acceptable.

    Purpose of the Study:

    • To evaluate the efficacy and safety of lidocaine and prilocaine for anesthesia in neonates and infants.
    • To assess the analgesic effects in procedures like circumcision, heel blood sampling, and venipuncture.
    • To review the approved indications for lidocaine and prilocaine in young children.

    Main Methods:

    • Systematic review of clinical trials and studies on lidocaine and prilocaine.
    • Comparative analysis of efficacy against placebo, penile block, and local anesthetic injections.
    • Assessment of adverse events, including symptomatic methaemoglobinaemia.

    Main Results:

    • Lidocaine and prilocaine cream showed efficacy over placebo for circumcision pain prevention.
    • Efficacy was lower than penile block or local anesthetic injection for newborn circumcision.
    • No significant analgesic effect was observed for heel blood sampling; moderate effect for venipuncture in newborns.
    • Symptomatic methaemoglobinaemia occurred when usage conditions were not followed.

    Conclusions:

    • Lidocaine and prilocaine combination is now approved for skin anesthesia in infants 0-3 months.
    • Its effectiveness varies by procedure, being less effective than invasive methods for certain newborn interventions.
    • Adherence to recommended usage is crucial to prevent adverse events like methaemoglobinaemia.

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