The length of time on a medication/drug which may cause tolerance and dependence is relative to the dose and the regularity with which the drug is taken. For instance, a patient might be prescribed...
About 6/8 weeks,< somebody else- me i say about 3 to 5 months if u want it to your shoulders depending on how u take care of ur hair of ur hair, 6 to eight weeks sister is so not enough <both...