How do I take finasteride? Sophie July 13, 2018 01:44 Updated Follow For information on how to take finasteride, click here. Related articles How do I use minoxidil? How long does it take for Keeps hair loss treatments to start working? What about side effects? Why do I have to submit a photo of my government-issued ID? Can women be exposed to finasteride? Comments 0 comments Article is closed for comments.