what are you using at the moment?
few days ago i was searching for similar questions. Tricomin seem to be a better choice. it work together with other treatment but not much by itself. result is from make scalp feel better, hair look thicker, some regrow to nothing. at least most felt it keep the scalp heathly.
most people comment Revivogen did nothing for them. of course they might not be using long enough to see it effect. HairLossTalk.com is using it and he believe it somehow work if use long enough. base on feedback from folks buying from hairlosstalk site, if use long enough, most experience some result.
you can also look into spironolactone.