I'm 19 yrs old and I don't have any facial hair. My moustache hair is so tiny & unshiny & unnoticeable. Any suggestions?

Facial hair is a genetic trait.  If you weren't born with the genes for facial hair, medications will not likely help.Hair transplant may be an option.

Be patient - some men don't develop moustache and beard hair until their mid-twenties. There is often a family history of late facial hair development although this is not always present.

What you need is patience. IF the mustache thickens up with minoxidil, it will not be a lifetime commitment because eventually your beard and mustache will grow. Give it 10 years or so. Ask you dad, brother, grandfathers on both sides of the family how long it took to grow their beards, and you will probably follow their course.Patience is a virtue and at 19, that virtue is pressed. I remember an experience with one of my 8 year old sons, who was demanding something (can't remember what) so I told him that he needed to have patience. His response was: "I can't have patients, I'm not a doctor". So patience is clearly not patients, and patience is something we learn with time.