Cities and counties won’t be able to enact their own ordinances to ban the sale of cold medicines used to make methamphetamine.That was the opinion released this week by Tennessee Attorney General Bob Cooper.Cooper’s decision comes as several municipalities have considered restrictions to require a prescription to buy ephedrine and pseudoephedrine-based cold medicine. Such cold medicine does not currently require a prescription, but customers have to show ID when buying the products at a pharmacy counter.State Rep. Judd Matheny, R-Tullahoma, requested the ruling from Cooper because the city of Manchester was considering an ordinance.“What this opinion says is the local guys don’t have the constitutional authority to make this decision,” said Matheny. “It’s something that has to be handled at the state level and it’s one of the main issues I see in the General Assembly for 2014.”Matheny said he will push to make ephedrine and pseudoephedrine products available by prescription only.“I think it would absolutely make a difference in the fight against meth,” said Matheny.