This document discusses drug use and abuse in the workplace. It finds that drug use decreases productivity and increases absenteeism, tardiness, and requests for time off. It also leads to higher risks of workplace accidents, injuries, and other claims that increase costs for employers. The most commonly abused drugs are marijuana, amphetamines, opioids, and depressants. While drug testing can help address this issue, many employers only use basic 5-panel tests that do not detect all prescription drugs that are abused. More advanced testing panels are needed to improve workplace safety and reduce costs of drug abuse.