My diffuse unpatterned hair loss (or senile alopecia, I’m 59) has continued to get worse despite 2 years straight of finasteride. In your experience, have you seen a reason for people to continue finasteride after 2 years, if their hair loss simply continues to progress?
Finasteride 1mg (Propecia) is for the treatment of androgenic alopecia, not senile alopecia or diffuse unpatterned alopecia. I realize they may co-exist, and some doctors and patients may make the decision the try taking the medication to see if it would help. If you are not seeing any results, speak with your doctor and decide on the course of action.
In my experience, I do not prescribe finasteride for treating diffuse unpatterned hair loss or senile alopecia.