hair loss and gear...

Is there any specific meds I need to avoid when getting something for hair loss? I heard propecia(sp) was not good to use while on gear from someone but I thought I would ask the Bros on here to see. Thanks.
BTW I am on 200MG of EQ and ETH 2 times a week.

Only hair med I use is Nizorall 2% which has worked great for me. No hair on the pillow, no hair floatin around when I'm cruisin with the windows down.

is that a prescription or counter? If counter where can I get some..