Developed by the Texas Christian University, Institute of Behavioral Research, the TCU Drug Screen questions relate to the respondent’s drug use, its effect on the respondent’s work/school life and relationships, and any deleterious physical effects on the respondent. The first 17 questions deal with all drug types, while the final 17 questions comprise the opioid supplement and deal only with the respondent’s use of licit and illicit opioid drugs.