Going bald in your dreams can be really be frightening, but this dream luckily is not prophetic of propecia.
Hair loss in dreams has more to do with self-image than literally losing hair from your head. Its quite similar to dreams of losing your teeth. In losing hair, there is a sense of vanity and deep-seated insecurity involved.
Your locks being a source of pride, youth and good looks- the loss of it would be devastating to your ego. Dreams of baldness prey on our fear of aging, of losing virility or going full ugly. It also signifies a loss of will power or strength to overcome problems, but do not fear, hair does grow back and your inner strength will eventually triumph over your fears.