Reply #16: I googled it

[SW FL Dem]

It's the Methamphetamine Anti-Proliferation Act of 1999. It limits purchases of products containing pseudoephedrine.

http://www.deadiversion.usdoj.gov/pubs/brochures/pseudo/pseudo_notice.htm

Many states have stiffer restrictions and most chain stores have voluntary policies that are tougher than federal law. One interesting thing I found was that the state of Washington's law exempts pediatric products.