Drug testing is a commonly used tool to help identify substance abusers and assist in offender supervision. Courts in many instances require offenders to undergo urinalysis throughout supervision. Urinalysis is an efficient information tool that gives staff quick and accurate results while identifying the illegal substances offenders are using. Drug tests provide objective feedback about offenders and assist staff in determining how best to address issues associated with drug use. The information gathered from drug tests helps guide offenders through the stages of change. Staff must continuously monitor the test results and respond accordingly.