Need Help Interpreting This Paper (pubmed:25600492)

[technoport]

Why did they use Finasteride in this study?
Also can i use PM instead of finasteride?

i'll leave it to the forum to figure that out and help everyone

Full paper link : http://puresterol.com/wp-content/uploads/2015/04/2.-PM-Prostatic-Hyperplasia-2.pdf

Thanks!