First Data Management has released the ATR Drug Kit, which is an ATR/FT-IR spectral library for rapid screening of street drugs. It models over 200 common two- and three-component street drug mixtures. Searching spectra of mixtures against typical neat compound libraries generally fails when one component exceeds 10% relative concentration. The model spectra, for example, provide users with the possibility matching 30 : 70 or 50 : 50 mixtures. Drug mixtures include Oxycodone + Aspirin, Heroin + Caffeine and Cocaine + Acetaminophen. The library is available for use with most FT-IR search software programs.