I don!t understand, what you mean. Why should someone stop minoxidil use?! He would be bald within 6 months. Once you jump on it, you must take it till the end of your life!
First of all, you shouldn't "waste" your time on this forum. I think it's the right time to interrupt your glorious career as the biggest internet mystifier of all-time. Enjoy your pension in Florida, mister!
Forget it! Once you jump on minoxidil, there is no way back. Unless you want to end up like Kojak. No other treatment can keep hair saved by minoidil.
P.S.: Your friend's doctor is obviously a dangerous idiot.