Apply Emu oil into the scalp when you go to bed. I found when using Emu oil nightly, it forms a long lasting depot in the follicles even after a hair wash, and 'buffers' the scalp skin so well I can use all these shampoos daily without itch like I used to get.
...and Emu oil may well be far more effective than minoxidil anyway...AND its a powerful local anti-androgen.