 Methamphetamine can be produced in home laboratories using pseudoephedrine or ephedrine, which, at the time, were the active ingredients in over-the-counter drugs such as Sudafed and Contac.Preventive legal strategies of the past 17 years have steadily increased restrictions to the distribution of pseudoephedrine/ephedrine-containing products.As a result "pharmaceutical companies and retailers such as Target, Walgreens, CVS, Kroger and Winn-Dixie have restricted sales of pseudoephedrine-containing products.