Topical liquiritin improves melasma.
Twenty women with a clinical diagnosis of melasma were treated with liquiritin cream on one side of the face and with a vehicle cream on the other side twice daily for 4 weeks. Patients were advised to avoid sun exposure and/or used topical sunscreen during the entire period of treatment. Inclusion criteria included an age range from 18 to 40 years and bilateral and symmetrical idiopathic epidermal melasma. Exclusion criteria included patients with dermal melasma (differentiated by Wood's light), melasma with pregnancy, and patients currently receiving hormone replacement therapy. Melasma pigmentary intensity was rated on a five-point scale in relation to the patient's normal facial skin (1, no difference; 2, slightly more pigmented; 3, moderately more pigmented; 4, markedly more pigmented; and 5, intensely more pigmented). The size of the lesions was measured directly using a millimeter grid scale. Ratings and measurements were made prior to treatment and at each of the follow-up visits (after 2, 4, 6, 8, and 10 weeks). Clinical evaluation was performed at week 4; the overall response was rated as excellent, good, fair, or poor. Color photographs were taken at the start and at week 4 of the study. Side-effects were observed and treated.[1]References
- Topical liquiritin improves melasma. Amer, M., Metwalli, M. International journal of dermatology. (2000) [Pubmed]
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