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Related Experiment Videos

Choosing and using a vehicle.

Y L Lynfield, S Schechter

    Journal of the American Academy of Dermatology
    |January 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Adults need about 22 grams of topical medication for thin body coverage. Self-application of sunscreen, however, often misses areas, indicating potential application inefficiencies.

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    Area of Science:

    • Dermatology
    • Pharmacology
    • Cosmetic Science

    Background:

    • Accurate topical medication dosage is crucial for efficacy and safety.
    • Understanding self-application techniques can optimize treatment outcomes.
    • Previous studies have not comprehensively quantified medication amounts for full-body coverage.

    Purpose of the Study:

    • To determine the average amount of topical medication required for thin, full-body coverage via self-application in adults.
    • To investigate factors influencing topical medication usage, including body surface area, container size, sex, and instructions.
    • To compare medication usage and application completeness between self-application and trained attendant application.

    Main Methods:

    • Twenty-nine adult participants were instructed in thin, full-body application of topical medication.

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  • The quantity of medication used was measured and recorded.
  • Factors such as surface area, container size, sex, and instructions were analyzed for their impact on usage.
  • A fluorescent sunscreen was used in a subset of participants to assess application coverage completeness.
  • Medication usage was compared between self-application and application by a trained attendant.

    • Main Results:

    • The average amount of topical medication used for thin, full-body coverage was 22 grams.
    • Medication usage varied significantly with body surface area and container size, but not with sex or specific instructions.
    • No significant difference was observed in the amount of medication used between creams and ointments, or between alcoholic and creamy liquids.
    • Application by a trained attendant required less medication compared to self-application.
    • Self-application of fluorescent sunscreen revealed that many body areas were frequently missed.

    Conclusions:

    • Approximately 22 grams of topical medication is needed for adequate thin, full-body coverage in adults.
    • Self-application, particularly of sunscreens, may lead to incomplete coverage, highlighting potential for improved application techniques.
    • Trained application is more efficient, suggesting a need for better patient education on topical medication application methods.