Book excerpt: Presents findings on substance use among workers & on workplace drug policy & programs from the 2002, 2003, & 2004 Nat. Surveys on Drug Use & Health (NSDUHs). NSDUH is an annual survey of the civilian, non-institutionalized population of the U.S. aged 12 years or older. The survey provides data on substance use & related issues among the U.S. population. NSDUH collects info. on employment status, type of business, specific occupations & industries, & info. on drug-testing policies & programs from U.S. workers. This report analyzes the worker info. in conjunction with the substance use data collected in the survey to investigate substance use among full-time employed workers aged 18-64 during the period 2002-04. Over 100 tables.