About applying Minoxdil after Hair Transplant -=[H.S]=-

I recently got HT on 17th Dec 2010. After 7 days My doctor asked me to apply Minoxdil 10%. I want to know whether it is appropriate to start with 10% straightway ? Whether our body develop resistance against it if we continue to use it for long period of time ?

Please Solve my query I will be really Obliged .