Topeka ? Kansas law enforcement officials Wednesday said they will push for a law similar to one in Oklahoma that restricts the sale of certain over-the-counter drugs that are used in the production of methamphetamine.

“We know the Oklahoma law is working,” Larry Welch, director of the Kansas Bureau of Investigation, said.

Oklahoma officials say they have cut the number of meth labs in half by restricting the sale of the tablet form of ephedrine or psuedoephedrine. Consumers can still buy the tablet form but they must show a photo ID and sign for the drug.

While Oklahoma officials say the law has helped reduce meth production in that state, Welch said it also has sent meth-makers into Kansas to buy the precursor drugs.

Welch and Col. Bill Seck, of the Kansas Highway Patrol, said they will make recommendations for the legislative session that starts Jan. 10 aimed at reducing the production of meth.