National Precursor Log Exchange

The National Precursor Log Exchange (NPLEx) is a real-time electronic logging system which tracks sales of the methamphetamine precursors ephedrine and pseudoephedrine in the United States. The program is operated by the National Association of Drug Diversion Investigators (NADDI), funded by manufacturers of pseudoephedrine medicine, and technology provided through contract by Apriss Inc.

Source: Wikipedia — National Precursor Log Exchange (CC BY-SA 4.0)