I live with 2 other flatmates, I leave my propecia and minoxidil lying around for anyone to see. I don't really care. I wouldn't make a big deal of it, I doubt she is going to care, you are trying to improve the way you look she will love it.
I don't hide it, I just don't tell anyone and if they ask then I say what it is, and then they just say, really you don't need to be on that or something kind like that. I have told my ex girlfriend about it and she was fine with it. She was even fine when I had my front tooth out and looked like a pirate for a while haha.
Go hard man no-one cares except yourself.....
my mates give me sh*t, but if you can't laugh at yourself then you truley have problems.
If she asks about it tell her, don't make it a big deal, she prob doesn't even know what it is.