Gov. Tom Vilsack signed a bill in Des Moines restricting access to pseudoephedrine, an ingredient in common cold medicine that's also used to produce the highly addictive drug methamphetamine.
The law prohibits one-time sales of more than a single package of liquid and liquid gel capsules containing less than 360 milligrams of pseudoephedrine -- about the amount found in children's cold medicines. Retailers must keep the products locked up.
