Welcome to the Drug & Alcohol Screening group of SmartGuy.com. Feel free to interact with other professionals from across the world. You can find professionals, find deals on services, find professionals who might barter, or simple post questions, comments, or suggestions. A drug screening, drug test, alcohol screening or alcohol test a technical analysis of a biological specimen, for example urine, hair, blood, breath, sweat, and/or oral fluid/saliva in order to determine the presence or absence of alcohol or a specified parent drugs or their metabolites.