Hi Rose,
I have also been on Tamoxifen for the last 4 months and have asked my GP about my hair which came back mostly salt rather than pepper is thinning in particular around the front ( I don't have hair long enough to do a comb over or a fringe yet).
I have a Jennifer Rowe length ( in other words not much to begin with).
He said hair Cycle is 3 monthly , just keep eating well and it will sort itself out, (not much help:( ).
Lucky if you haven't had the horrible hot flashes and sweats. ( I'm only 50 but feel like 80 )
So if you find out anything that does help , please post it for the rest of us baldies. : ).