Tests are often categorized by the number of substances they screen for, known as "panels".
Different testing methods vary by their "detection window," or how far back they can identify drug use. DRUG TEST
: Typically screens for Amphetamines, Cocaine, Marijuana (THC), Opiates, and Phencyclidine (PCP). Tests are often categorized by the number of
A is a technical analysis of a biological specimen—most commonly urine, hair, blood, or oral fluid—to determine the presence or absence of specific illegal drugs or their metabolites. Common Drug Test Types DRUG TEST