: The most common for employment and legal reasons; can detect substances for days or weeks depending on the drug.
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
: Highly accurate but invasive; usually reserved for accidents or high-stakes clinical settings. Standard Drug Panels : The most common for employment and legal
: Provides a long-term history of drug use, often looking back up to 90 days. DRUG TEST
: Often used for recent-use screening; results are usually available within 24 hours.