Rill -
The primary purpose of including Nizoral is to help maintain a healthy scalp. Don't be tricked into thinking any product that claims it can "maintain a healthy scalp" is as good as Nizoral however. Nizoral has some antiandrogenic properties that help appease the monsters within, and eliminate the inflammation, itching, and flaking often associated with men experiencing hair loss. The myriad of hormonal changes going on in the scalp tend to aggrivate and flare up these areas of the skin, and if *any* of this is present, your hair loss will progress much faster, and your hair loss treatment regimen will not be as effective.
The participants in the Merck conducted FDA trials for Propecia were all required to use a shampoo like Nizoral, for optimum results.
I believe it should be a part of every hair treatment regimen. It's a shampoo you can get in any grocery store shampoo aisle, near the rogaine.
HairLossTalk.com