Rogaine Foam & Finasteride, Shaved Head

[brando1]

I am curious to know if shaving my head with a number zero electric shaver and taking Rogaine Foam with finasteride will help keep/grow hair or is pointless?
I only shave because my hair looks more even but once it starts to grow a couple weeks later you can see where its thining. It seems the hairs dont grow even, More small hairs then long hairs.

Thanks