Hair follicle drug tests involve removing a small hair sample for laboratory testing. Results can show if a person has been using certain drugs or prescription medications in the previous 3 months. It ...

Fleets that have implemented hair testing for illegal drugs in addition to the DOT-mandated urine testing for commercial truck drivers say not only is it the right thing to do, but it also offers ...

The chairman of a federal drug-testing advisory board that developed the controversial proposed mandatory guidelines for hair drug testing of truck drivers, other workers in safety-sensitive jobs and ...