How important is Rogaine and Nizoral?

[Dav7]

Just wondering. Am definitely going to go with a HT and propecia. However, I feel deeply uncomfortable with using Rogaine and Nizoral given that you have to rub the crap literally into your hair. One of the biggest fears would be using too much, hence a lot of shedding. Just wondering how vital would Rogaine and Nizoral be for somebody who has had a hair transplant and is using propecia?