Abusing drugs can seriously impact an individuals' health and well-being. Some drugs can also affect people's alertness, which can put them in danger when driving or operating machinery. Identifying the use of drugs has a number of different benefits, including evaluating the safety or capacity of someone in the workplace, identifying whether someone may have or be at risk of developing a problem with addictive substances. Parents may wish you test their children for drug use during teenage years in order to get them the help they need and prevent them from becoming addicted to illicit substances.