I've been on finasteride for 5 years now and started at nw5 brought me back to nw3 vertex. I take it everyday single day. I've never missed a single dose. I have 2 questions for you. 1.Does finasteride ever just stop working or mainly slowly lose effectiveness but continue to slow my hair loss? 2. If I switch to dutasteride how quickly would take for dutasteride to stop my hair loss once I transfer off finasteride? I don't want to get off fin and lose ground while I begin dutasteride. You know?