Switching from minoxidil to finasteride

Switching from minoxidil to finasteride

For patients wanting to switch from minoxidil to finasteride, a 4-month overlap is recommended to avoid hair loss before the effect of the oral treatment starts.

Source -
Androgenetic Alopecia
Endocrinology and Metabolism Clinics - Volume 36, Issue 2 (June 2007)