Can Alpecin Coffeine Shampoo decreases the effect of Finasteride?

[manuel.meier]

Hi all,

I take Finasteride for about a year now (1mg/day).
In addition to that I would like to use Alpecin Coffeine Shampoo.

I just want to doublecheck:
Could it be possible that the Alpecin Coffeine Shampoo decreases the effect of Finasteride?

Thanks folks!