I may be wrong but this stuff is basically just shampoo. It works on cleaning up sebum in the hair. Some people do suffer from hairloss due to sebum in the hair.
Simple procedure is to wash your hair each day and preferentially in the night with a good shampoo. Mainly to get out your hair gel / paste etc. You should shampoo twice in that night.
And 'NO' - this is definitely nothing to do with finasteride or even linked to the process of how finasteride works.