Alco-Screen® is a rapid, highly sensitive method to detect the presence of alcohol in saliva and provide an approximation of relative blood alcohol concentration. Since it is well established that the concentration of alcohol in saliva is very close to that in the blood, saliva is the preferred specimen for alcohol testing, allowing for higher detection sensitivity than breath testing methods. Alco-Screen® is a simple, one-step, 2 minute test that requires no instrumentation, calibration or special training to be used effectively. It is convenient enough to be used any time, and in any place.