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The Solution

Currently, 32 states have adopted real-time, stop-sale technology.1 These systems process pseudoephedrine (PSE) sales much like a credit card transaction, declining sales that would put a purchaser over the legal limit, no matter where a previous purchase was made.

Real-time, stop-sale technology keeps purchase records – already required by federal law – in one place, ensuring meth cooks are stopped before they can buy the illegal quantities of PSE for use in meth labs. These systems can also alert law enforcement of repeated attempts by meth cooks to circumvent the system.

Personal information from purchase records kept by the stop-sale system is stored securely and, under federal law, is only accessible by law enforcement to help identify meth cooks.

Real-Time, Stop-Sale Technology Works

The multi-state National Precursor Log Exchange (NPLEx) system has now been deployed for several years, and states that have been using stop-sale systems are seeing the results.

Benefits of NPLEx: Real-Time, Stop-Sale Technology

  • Ensures effective enforcement of current laws.
  • Works in real-time to block illegal PSE sales.
  • Works across all retailers.
  • Uses purchase records already required by law.
  • Accessible only by law enforcement.
  • Places no new burdens on legitimate consumers.
  • Works across state lines.
  • Provided free of charge to retailers, pharmacists and states.


1. AL, AZ, DE, FL, HI, ID, IL, IN, IA, KS, KY, LA, ME, MI, MO, NC, ND, NE, NV, OH, OK, PA, SC, SD, TN, TX, VA,VT, WA, WV.

2. From January to September, 2011:  Source Appriss Inc.