Overview Azelaic Acid Versus Hydroquinone in Melasma Status: Unknown status Trial end date: 2010-12-01 Target enrollment: Participant gender: Summary The purpose of this study is to compare the safety and effectiveness of Azelaic Acid Gel to Hydroquinone Cream in the treatment of melasma. Phase: Phase 4 Details Lead Sponsor: Callender Center for Clinical ResearchTreatments: Azelaic acidHydroquinone