Hairwish

Has anyone used Xandrox 15, the minoxidil 15% solution, and what success have you had?

I started taking this 4 wks ago. My understanding from what I've read here is that is is Minoxidil. I am shedding long and short hairs. When I say short I mean thinner hairs, but this happened anyway when I shampood. I read here to wait and the shedding will stop or atleast fewer hairs fall out. Again it's been 4 wks. Is this normal? Also, How long does it have to absorb in the scalp before I can wash my hair and style as usual? Does the minoxidil not let the scalp breath after a while and need to be washed out? My hair feels nasty.