Transplanting Hair Between Existing Hairs

Dear Dr. Rassman,

How dense can hair transplant be done assuming that there are plenty of donor area with thick hair and the target area still has 50% density? Can hair transplant be done in-between existing hairs to make the hair thick again?

Tried Propecia but stopped after 2 days because of side effects. I appreciate your help on the matter.

You can transplant between existing hairs without difficulty, providing that the existing hairs are permanent and not miniaturized. I have seen patients receive very dense hair by transplanting between hairs that were previously transplanted.