Substance of Abuse Tests (Drug Testing Kits) are the foundation of NHM Distributing; after all it’s how we started. We are the largest supplier of drug testing panels in our industry, with an unparalleled selection of easy to use testing devices, customer satisfaction, and item profitability. Our drug tests are FDA approved and 99.9% accurate. Easily one of the best-selling categories on our website! No other company in the smoke shop industry can offer the selection and variety of testing devices. These drug testing kits provide a low-cost, high profit margin item for your retail shop that takes up minimal space and basically sells itself.