From personal experience once you buy proactiv you almost will always have to buy it .. Will it clear up his skin yes but he will have to use it constantly because if he stops the cycle it comes back worse.. IN THE CASES IVE PERSONALLY SEEN..
Now what works and works for alot of people I know including myself is :
SAFEGUARD WHITE ANTIBACTERIAL SOAP WITH GOOD OLE H20 WATER THATS IT AND ITS CHEAP
Merry Christmas