Novel approach to the treatment of hyperpigmented photodamaged skin: 4% hydroquinone/0.3% retinol versus tretinoin 0.05% emollient cream.


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Abstract

BACKGROUNDMild to moderately photodamaged skin is characterized by dyspigmentation, fine wrinkles, and tactile roughness. An optimal approach to the topical treatment of photoaging would simultaneously address all appearance issues.OBJECTIVEThis study was undertaken to evaluate the effect of 4% hydroquinone and 0.3% retinol in photoaging.METHODSA 16-week study was designed to evaluate the efficacy and tolerance of a single cream containing prescription topical 4% hydroquinone for dyspigmentation and the cosmeceutical 0.3% retinol for fine wrinkles in an emollient vehicle for tactile roughness. This novel formulation was compared with 0.05% tretinoin emollient cream, the standard against which all other topical photoaging treatments are compared. Investigator assessments, subject assessments, and photography represented the evaluation end points.RESULTSThe cosmeceutical emollient 4% hydroquinone/0.3% retinol cream more effectively diminished the collective signs of photodamage than 0.05% tretinoin emollient cream in terms of dyspigmentation, fine wrinkles, and tactile roughness in 16 weeks.CONCLUSIONSCombination therapy of hydroquinone and retinol may improve photoaging-associated hyperpigmentation.

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