Thanks for all the helpful replies. I was using rogaine foam for years with ok results. I switched to lipogaine and felt like it gave me an edge. Then when perfect hair came out I tried that and couldn’t use it because it gave me a rash. I went back to rogaine foam then that irritated my scalp as well. Tried going back a couple times and always irritatation. I just tried using rogaine liquid and so far so good. My plan is to stay on it as long as I don’t get a rash, and if all goes well try lipogaine again in the future.