women with androgenic alopecia. About 40% of men experience hair regrowth after 3–6 months. It is the only topical product that is FDA approved in America for androgenic hair loss. However, increased hair loss has been reported. Antiandrogens Finasteride is used to treat male pattern hair loss. Treatment provides about 30% improvement in hair loss after six months of treatment, and effectiveness only persists as long as the drug is taken. There is no good evidence for its use in women. It may cause gynecomastia, erectile dysfunction and depression. Dutasteride is also used in the treatment of male pattern hair loss and appears to have better effectiveness than finasteride for the condition. While used off-label for male pattern hair loss in most of the world, dutasteride is specifically approved for this indication in South Korea and Japan. There is tentative support for spironolactone in women. Due to its feminising side effects and risk of infertility it is not often used by men. It can also cause low blood pressure, high blood potassium, and abnormal heart rhythms. Also, women who are pregnant or trying to become pregnant generally cannot use the medication as it is a teratogen, and can cause ambiguous genitalia in newborn children. There is tentative evidence for flutamide in women; however, it is associated with relatively high rates of liver problems and strong recommendations have been made against its use. Like spironolactone, flutamide is typically only used by women. Bicalutamide is another option for the treatment of female pattern hair loss. It has a far lower risk of liver toxicity than flutamide and is said to have an excellent safety profile. However, bicalutamide retains a small risk of liver toxicity and for this reason periodic liver monitoring is recommended during treatment. Ketoconazole Ketoconazole may help in women. Technological treatments Low-level laser therapy (LLLT) Low-level laser therapy or photobiomodulation is also referred to as red light therapy and cold laser therapy. It is a non-invasive treatment option. LLLT is shown to increase hair density and growth in both genders. The types of devices (hat, comb, helmet) and duration did not alter the effectiveness, with more emphasis to be placed on lasers compared to LEDs. Ultraviolet and infrared light are more effective for alopecia areata, while red light and infrared light is more effective for androgenetic alopecia. Medical reviews suggest that LLLT is as effective or potentially more than other