Low-dose oral minoxidil as treatment for non-scarring alopecia: a systematic review
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2020-08-01
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Background: Topical minoxidil has been used for almost 40 years to treat alopecia. There is growing evidence supporting off-label use of low-dose oral minoxidil. Objective: To conduct a systematic review evaluating the use of oral minoxidil for all types of alopecia. Methods: A primary literature search was conducted using PubMed in May 2019, utilizing the search term “oral minoxidil AND (hair loss OR alopecia OR baldness)”. Reviews, non-English studies, and articles concerning only topical minoxidil were excluded. Results: Ten articles were included for review comprising a total 19,218 patients (215 women and 19,003 men). Oral minoxidil dose ranged from 0.25 to 5 mg daily to twice daily. The strongest evidence existed for androgenetic alopecia and alopecia areata (AA), with 61–100% and 18–82.4% of patients demonstrating objective clinical improvement. Successful treatment of female pattern hair loss, chronic telogen effluvium, monilethrix, and permanent chemotherapy-induced alopecia was also reported. The most common adverse effects with oral minoxidil included hypertrichosis and postural hypotension. Conclusion: Oral minoxidil is a safe and successful treatment of androgenic alopecia and AA. In addition to its therapeutic benefits, practical advantages over topical minoxidil stem from improved patient compliance.
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International Journal of Dermatology, v. 59, n. 8, p. 1013-1019, 2020.