Urine tests are a common method for detecting illicit drug use, providing valuable information for medical professionals and employers. According to WebMD, these tests are widely used due to their non-invasive nature and ability to detect a range of substances, including marijuana, cocaine, amphetamines, opioids, and benzodiazepines. The detection window for each drug varies; for example, marijuana can be detected in urine for up to 30 days in chronic users, while cocaine is typically detectable for up to four days.

The process involves collecting a urine sample and analysing it using immunoassay screening and, if necessary, confirmatory tests like gas chromatography-mass spectrometry (GC-MS). While urine tests are generally reliable, false positives can occur, necessitating confirmatory testing. These tests are crucial in various settings, from workplace drug testing programs to monitoring individuals in substance abuse treatment.

Source: WebMD