SUMMARY
Urinary drug screening can detect substances including over-the-counter and prescription drugs. The focus of screening is often illicit drugs.
Simple point-of-care tests, largely immunoassays, can rapidly detect a class of drugs or specific drugs in urine. More complex large scale laboratory screens and confirmatory tests can also be used.
Urine tests can often provide evidence of previous drug consumption. Screening is therefore useful in monitoring abstinence from drug use, the use of drugs in the workplace and in legal disputes.
