Everything published about minoxidil is that its a topical anti-androgen.

Over time, applied to DHT susceptible follicles it will help them resist miniturazation.

The transplanted hairs are (hopefully) DHT resistant, so I can see no benefit for growth!

It may help maintain native hair that is balding.

If minox can protect DHT resistant hair from shedding, then it would make sense that it would strengthen hair outside the balding zone, but that is just not the case.

I think the benefit must be mostly placebo. People need something to do with their hands after surgery and feel like they are helping their result.

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My Hair Loss Web Site - Hair Transplant with Dr. Wong

Emperor,
I have been reading and going to meetings for years and have never heard Rogaine (minoxidil) described as an anti-androgen. I think you have mixed it up with finasteride. We know that minoxidil is a vasodilator and may increase blood supply in the skin. In fact, some surgeons stop it a few days before surgery to avoid excessive bleeding. I don't, and have never been impressed bleeding was increased with it being used right up to the time of surgery. Also, we know it has an effect on potassium in the cells, but most of its action is relatively unknown, and some have simply described it as a "growth factor" for hair, although in reality it is much better at preventing hair loss than in actually growing hair. It probably works best in growing hair when used in conjunction with finasteride (Propecia), as it is synergistic with the other medication.
Mike Beehner, M.D.

"We know that minoxidil is a vasodilator and may increase blood supply in the skin".

Hear that fellas....CARDIO, CARDIO, CARDIO.................