Minoxidil is the only topical drug approve for the treatment of androgenic alopecia and is available in a variety of concentrations, including eight concentration modes of 1%, 2%, 3%, 5%, 7.5%, 10%, 12.5%, 15%, with the most commonly used concentrations being 2%, 5%, 10%, and 15%. Of the four modes of concentration – 2%, 5%, 10%, 15% – which is …