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  • Title: Adapalene 0.1% gel is better tolerated than tretinoin 0.025% gel in acne patients.
    Author: Clucas A, Verschoore M, Sorba V, Poncet M, Baker M, Czernielewski J.
    Journal: J Am Acad Dermatol; 1997 Jun; 36(6 Pt 2):S116-8. PubMed ID: 9204089.
    Abstract:
    BACKGROUND: Adapalene is a new naphthoic acid derivative developed for the topical treatment of acne vulgaris. OBJECTIVE: We describe the results of a combined safety analysis of two multicenter trials conducted in the U.S. and Europe in which adapalene 0.1% gel was compared with tretinoin 0.025% gel in the treatment of mild to moderate acne vulgaris. METHODS: A total of 591 acne patients were enrolled in these investigator-masked, randomized, controlled, parallel group studies. In the two studies, each patient was randomly assigned to receive topical adapalene 0.1% gel or tretinoin 0.025% gel once daily at bedtime, for 12 weeks. In addition to assessments of efficacy and facial skin tolerance, data on adverse events were recorded at each visit or at any other time the patient reported problems. We extracted data concerning adverse reactions (i.e., adverse events judged to be related to the study treatment) from both studies and combined the results to obtain a global comparison of safety of the two products. RESULTS: A total of 15 of 296 patients (5.1%) reported 19 adverse reactions in the adapalene-treated groups, compared with 27 of 295 patients (9.1%) reporting 39 adverse reactions in the tretinoin-treated groups (p < 0.05). The number of patients discontinuing the study because of adverse events was approximately twice as low with adapalene (1.3% compared with 2.4%). Most adverse reactions for both products were related to skin irritation. No systemic adverse reactions were reported. CONCLUSION: The results of these two multicenter clinical studies indicate that adapalene gel is better tolerated than tretinoin gel.
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