Kirklands minoxidil makes my head itch, but I don't itch it though, or scratch it, whatever an d I only shed about 5-10 hairs max when I shampoo and I think that's exaggeration cause all I see is like 2-3 on my hands.
I was once on Rogaine alone and it never caused itchiness. And it still doesn't. I am aware Rogaine and Kirklands have the same ingredients but for some reason Kirklands itches and Rogaine doesn't. Honestly, I haven't used the 10% yet even though I said I did, it is here and i'm gonna start it soon. I'm gonna use all 3 every day. Right now I only use kirks and Rogaine. K's twice a day, Rogaine once.
I don't know how the scalp is supposed to turn if you're allergic to PPG, but my scalp is not red or anything, it just itches with Kirklands, and it turns my hair really dry and gives me a look like if I have dandruff when I really don't.
Dr Lee's 15% and Rogaine never did any of this to me. Then again you look at Kirklands price and you know what they say, you get what you pay for. Pretty damn cheap, 12 bottles for $30.