Since minoxidil can start a fresh anagen phase for some of your hair follicles, it usually takes several months before you'll notice any effects on hair growth. Most studies indicate that the results from minoxidil usually start to show after six months, with few or no visible results in the first three months of use.
Note: get advised from doctor before using minoxidil.
: you will experience hair loss for the first month applied, for the new hair with strong roots to grow (which will push the current hair out)
: get some study about the effects (understandable only minor effects)