Doesn't stop hairloss, only slow it down.
You don't need expensive Rogaine/Regaine as their patent has expired and you can get generic of Minoxidil and in higher concetration from:
http://www.minoxidil.com/subpages/pr...ited%20Kingdom
Xandrox 5% better than standard Minoxidil 5%
Propecia (1mg of Finasteride) is more powerful at slowing down or stopping and in some cases reversing early hairloss (e.g. frontal):
http://en.wikipedia.org/wiki/Finasteride
It has side-effects and they are very common, sometimes permanent.
You can get Propecia from:
http://www.inhousepharmacy.co.uk/
They send it from New Zealand.