Minoxidil after a hair transplant to preserve native hair

I had some hair in the middle  before the surgery and now I can’t see it. I may have lost it. Should I take minoxidil to get it back as that is what my doctor suggested?  

Existing native hair may fall out in young men unless they are treated with finasteride to prevent hair transplant loss prior to the hair transplant. Rogaine (minoxidil) is good only if you were on it prior to the transplant and the existing hairs are dependent upon it. It does not do much to make the new transplanted hairs grow.