Do topical DHT inbitors cause initial shedding?

[Micheal]

I have thin hair on my crown and also thinning hair all over. I still have a lot of hair...although thin. The primary purpose for me now is to keep what I have. Regrowing hair on the crown would be helpful but it is a bonus.

I am planning to use Revivogen scalp therapy (which includes a topical DHT inhibitor, shampoo and conditioner) or Nanoguard B DHT Inhibitor with growth phase activator. I am not sure which one to use. Maybe try both.

According to them, these work by inhibiting the activity of 5 a-reductase II.

Does anybody have any experience with these or any other topical DHT inhibitors?