Hair Drug and Alcohol Testing by IDENTICO is a powerful tool for the detection of drug and alcohol use. Hair Drug & Alcohol Test can provide up to a 3 month history of alcohol and drug use by trapping biomarkers in the fibers of the growing hair strand. Hair sample is simple to collect and difficult to adulterate. Generally, the standard turnaround time for reporting negative screening test results is two business days, with an additional 1-2 business days for specimens that require confirmatory testing.