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  • Title: Split-face comparison of adapalene 0.1% gel and tretinoin 0.025% gel in acne patients.
    Author: Caron D, Sorba V, Kerrouche N, Clucas A.
    Journal: J Am Acad Dermatol; 1997 Jun; 36(6 Pt 2):S110-2. PubMed ID: 9204087.
    Abstract:
    BACKGROUND: Adapalene is a new naphthoic acid derivative developed for the topical treatment of acne vulgaris. OBJECTIVE: We compared the skin tolerance of adapalene 0.1% gel with tretinoin 0.025% gel in subjects with acne. METHODS: Fifteen acne patient volunteers were enrolled in this investigator-masked, left-right comparison, randomized, controlled, intraindividual study. Adapalene 0.1% gel and tretinoin 0.025% gel were applied once a day to one half-face by the volunteers for 14 consecutive days. Clinical signs (erythema, desquamation, papules, vesicles, edema) and subjective symptoms (tightness, pruritus, burning) were evaluated and scored daily except on weekends. RESULTS: Adapalene 0.1% gel was better tolerated than tretinoin 0.025% gel. The overall mean score calculated from all features combined was significantly higher with tretinoin gel than with adapalene gel (p = 0.002). CONCLUSION: Adapalene 0.1% gel was significantly less irritating than tretinoin 0.025% gel when tested in acne patients.
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