The most common method of drug and alcohol testing is urine testing. Urine testing detects recent substance use, typically within the previous 3 to 5 days. It is currently the only method accepted by federally-mandated companies. With its reliability in legal defense, cost-effectiveness, and capability to test for a wide variety of drugs, urine testing is the preferred testing method for most companies. Federally-mandated companies are only allowed to use the most upto-date panel for the Department of Transportation (DOT) Urine Drug Test. Non-DOT companies seeking urine drug testing commonly use our non-DOT 5 panel or non-DOT 10 panel urine drug tests.