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Related Experiment Videos

Hypersensitivity to hydrogenated lanolin.

T Sugai, J Higashi

    Contact Dermatitis
    |June 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Hypersensitivity to hydrogenated lanolin in topical medications caused increased dermatitis cases in Japan. Patch testing revealed significantly higher allergic reactions to hydrogenated lanolin compared to anhydrous lanolin.

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    Area of Science:

    • Dermatology
    • Allergology
    • Contact Dermatitis

    Background:

    • An increase in dermatitis cases linked to betamethasone-17-valerate ointment containing hydrogenated lanolin was observed in Japan post-1971.
    • Hydrogenated lanolin is a common ingredient in topical pharmaceutical preparations.

    Purpose of the Study:

    • To investigate the incidence of hypersensitivity to hydrogenated lanolin and anhydrous lanolin.
    • To identify potential allergens within hydrogenated lanolin responsible for contact dermatitis.

    Main Methods:

    • Patch testing was conducted on patients presenting with suspected allergic contact dermatitis.
    • Concentrations of 1% and 0.5% hydrogenated lanolin and anhydrous lanolin were used for testing.

    Main Results:

    Related Experiment Videos

    • Hypersensitivity to hydrogenated lanolin (5.20%) was significantly higher than to anhydrous lanolin (1.99%) at the 1% concentration.
    • Sensitivity to both lanolin types was also observed at the 0.5% concentration.
    • Potential allergens identified include lanolin alcohols, hydrogenation byproducts, and trace metals (nickel, copper, chromium).

    Conclusions:

    • Hydrogenated lanolin is a significant contact allergen contributing to increased dermatitis prevalence.
    • The hydrogenation process may introduce new allergens or alter existing ones, increasing allergenic potential.
    • Further research into the specific allergenic components of hydrogenated lanolin is warranted.