ive been on minoxidil 2% and nizoral 1% for over a month now and it still irritates, flakes, and itches my scalp like a b**ch.
i asked this same question before and a lot of veteran posters told me that it took them up to 4 months to adjust to the minoxidil.
2 weeks... perfectly normal.. and i was given this advice by a veteran poster... even when it itches badly, don't scratch it and in a while it will go away.