I second everything that Crimsonshedemon says. I apply Rogaine (I finally found a generic that I can open without difficulty so I use that) every night. I'm really lazy about it and sloppy and I just squirt the foam on my fingers and smoosh it onto the thinning areas. Then I wash off my fingers. (Don't want hairy fingers LOL). It works fine.

Good luck - I hope you find something that works for you.
2/c-3a Coarse hair med. density.
Protein sensitive but can use occasionally
Highly porous. Color over grey.
Best 1st day method: Ice Queen!
Stylers: Mix Curls in a Bottle into everything for shine. Terrible pj
Sometimes try roller sets or use a curling brush - classic glamor.
Every day is a gift