Conducting random drug testing not only deters workplace drug abuse, but it can allow a business to experience increased productivity, reduced absenteeism, improved work quality, and fewer healthcare costs. It can be difficult for supervisors to determine drug use for all employees, but with random drug testing, the guesswork is removed. It is estimated that drug addiction costs businesses and organizations in the United States $81 billion a year due to increased absenteeism, low work quality, decreased productivity, thefts in the workplace, disability claims, and employee illness. But it also can cost a business its reputation should impairment of sales reps, delivery personnel, guards, customer support staff, or anyone else be witnessed by customers and clients. Companies should adhere to applicable federal and state laws, which can vary across the country.