Male pattern baldness is unlike other conditions that lead to baldness (e.g. autoimmune diseases, vitamin deficiency, protein deficiency) in that once it has progressed to the point where the scalp is bald, regrowth is virtually impossible.
Minoxidil is not effective in treating a receding hairline and is only approved for use on the “vertex” or the top of the scalp. Also, once hair loss covers too large an area and has persisted for too long, minoxidil is less likely to be effective. The younger the patient and the sooner the patient starts treatment, the better the results. Also, minoxidil has been clinically proven to work better when used in combination with finasteride, an oral prescription medication approved for androgenic alopecia, or male pattern baldness.