There are different types of T/Gel shampoos, like Daily Dandruff Shampoo, T/Sal, T/Gel Shampoo, and so on. My question is, which is the one that you guys use and which is the one that was used in the study of the affects of Propecia?
I think the non-prescription strength coal-tar version was the one that they used for the study. But the point is keeping your scalp from getting inflammed, since this is both a symptom of male pattern baldness and makes male pattern baldness worse. So use whatever you find keeps things nice up there: not inflammed and no scaling or major dandruff.
Incidentally, if you're looking for a good shampoo to use while fighting hair loss, why not use Nizoral? Have you looked at the Nizoral study at this site? Go to: http://www.hairlosstalk.com/resourcelibrary/
and download the pdf for "Ketoconazole's 2 Year Effect on Hair Loss."