Urine drug testing in pre employment drug testing will not be effective test as the urine samples are mishandled by the donors. It is simple to adulterate the urine sample. There are too many ways to adulterate a urine drug test and, with the exemption of marijuana, urinalysis tests merely are evidence for positive for drugs that have been used in two to three days of the drug test. Hair drug test is a faraway and more efficient technique to screen for illicit drug abuse as it confirms drug abuse and drug record for a number of months. (more…)