Minoxidil (UK brand name Regaine®) and Finasteride (UK brand name Propecia®) are the two drugs that are currently medically approved treatments for hair loss. Both Minoxidil and Finasteride have been tested extensively and both have been used in high doses for the treatment of other conditions so a lot of safety data has been collected. Minoxidil is applied directly to the areas affected in the form of a solution. It is not clear exactly how Minoxidil works, but it may be that improved blood flow to hair follicles has a part to play in its effect. Finasteride is taken in tablet form and has a specific effect on an enzyme called 5 alpha-reductase which can produce high levels of DHT causing subsequent hair loss. Minoxidil is available from chemists in the UK without a prescription. Finasteride is a prescription only medicine.