Propecia is a medicine that has been approved by the FDA to treat hair loss in men. It can be prescribed to adult males only, and it’s only effective if taken as directed. Propecia is not for females, kids and also older adults. Do not utilize Propecia if you are a female or an older adult. Propecia, a prescription medication for the treatment of male pattern baldness in men older than 18, has been said to deal with hairloss within adult males.