DOES ROGAINE WORK AFTER 12 HOURS REDDIT

Yo dudes, so I'm trying on using Rogaine. Heard some stuff about it making a difference after just a couple hours, but that seems kinda wild, right? Anyone else try this magic potion and actually see changes in that time frame? Hit me up with your thoughts. Here's a few things I'm wondering: Where much Rogaine do you gotta use? Should apply it