Topeka ? Consumers in Kansas soon will have less access to some cold, flu and allergy medicines because they contain an ingredient commonly used to make methamphetamine.

Gov. Kathleen Sebelius signed anti-meth legislation into law Friday, as she had promised. The new law will take effect by April 21. Sebelius had a signing ceremony in Wichita.

The new law will be named for Greenwood County Sheriff Matt Samuels, who was shot and killed Jan. 19 at a home near Virgil where a suspected meth lab was found.

It will require certain cold and allergy tablets containing ephedrine or pseudoephedrine to be sold only by pharmacies from behind a counter. Customers will have to show identification and sign a log book. It makes it illegal for retailers to sell more than three packages within a week to a person.

The measure is patterned after an Oklahoma law credited in that state with dramatically reducing meth lab seizures.