This appears to be the statute in Illinois that limits the sale of Sudafed and similar drugs:
http://www.ilga.gov/legislation/ilcs...6&ChapterID=53
I think it does help. They've had similar laws in Minnesota for some time now and my understanding is the amount of active meth labs is way down from where it used to be. Of course, the illicit drug makers are just moving on to other things like synthetic marijuana and bath salts.