Abstract
This study assessed the levels of compliance to topical minoxidil (TM) among male and female patients with androgenetic alopecia (AGA) and analyzed the factors associated with minoxidil discontinuation. A retrospective study was conducted among 400 consecutive patients with AGA who presented to a dermatology clinic and who were prescribed minoxidil 2% or 5% in the past 5years. Demographic factors, other previous treatments, and minoxidil parameters including the dose (2% or 5%), total duration of use, treatment results, and side effects were collected. The mean age of the patients was 32.41years [standard deviation (SD) 8.18], and 66.5% were female. The majority of patients (82.5%) did not receive any previous treatment for AGA. Of the total patients, 345 (86.3%) have discontinued minoxidil. Discontinuation rate showed no association with sex (p = 0.271), age category (p = 0.069), or previous treatment (p = 0.530). Furthermore, the likelihood of minoxidil discontinuation decreased with the increase in treatment duration (p < 0.001) and was significantly lower among patients who reported improvement (69.3%) or stabilization of hair shedding (64.1%) compared with those who reported baby hair (88.9%) or no efficacy (95.3%) (p < 0.001). Furthermore, having experienced an adverse effect of minoxidil was associated with 93.6% discontinuation rate compared with 75.8% in the case of no side effects (p < 0.001). Adjusted analysis showed that minoxidil discontinuation was independently association with longer duration of use [> 1year; odds ratio (OR) 0.22; p < 0.001], perceived improvement (OR 0.17; p < 0.001) or stabilization (OR 0.14; p < 0.001), and the occurrence of side effects (OR 3.06; p = 0.002). The clinical use of TM in AGA is limited by a substantially low compliance even in absence of adverse effects. We emphasize the importance of educating patients regarding the treatment's side effects and the need to use minoxidil for a minimum of 12months to assess treatment efficacy.
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