Propecia Shedding vs Regular Hair Loss

I read alot of posts from medical experts and bloggers about shedding on Propecia and how it is a good sign that the drug is working. My question really is what is the difference between shedding on a drug like propecia and actual hairloss? How can you tell which one is occuring and at what point in your treatment do you accept your shedding as hairloss. Hope this is clear. I just don’t understand the difference. If 17% of males that use Propecia get no benefit did they experience hairloss that they believed was just shedding?

There is no way to distinguish shedding from Propecia (rare) vs normal shedding from continuation of male genetic hair loss. Hair loss shedding will be continuing at the same rate that you saw it prior to starting the drug if the drug is not working. Any shedding caused by Propecia should pass within 3-4 months so that by the 8th month, the benefits should be clear one way or the other.