DrProctor.com sells NANO shampoo. The stuff at LEF is supposedly a "lite" version, but Dr. P has said that it may be all that you need. I started using NANO when I stopped Propecia. I paid more for the NANO version (LEF's is called something else) since, if I got the cheaper stuff and it didn't "work," I wouldn't know if the more expensive stuff would have.
I have been using it since mid-February, and after a week or two, I have *zero* hairs collect at the shower drain. I'm sure some are slipping down the drain, but even on Propecia I used to get a regular clump at the drain. (Sorry, I never counted them like some people do) that being said, after stopping the Propecia, my front hairline has definitely thinned. So I had more hair on Propecia with hairs at the shower drain, whatever that means.
If you use the stuff, you can *really* stretch the bottle by first shampooing with anything that will clean your hair (and rinse), then put about a capsize circle of NANO in your palm, rub hands together and apply. I leave it in 3 minutes before rinsing. I've got half a bottle left after more than 3 months.