Drug Abuse (DAST) Assessment View Calculator Generally, when most people talk about substance abuse, they are referring to the use of illegal drugs. However, there are substances that can be abused for their mood-altering effects that are not drugs at all, such as inhalants and solvents, and there are drugs that can be abused that have no mood-altering or intoxication properties, such as anabolic steroids. Take this quick Drug Abuse Self Test (DAST) to learn more about the patterns of drug abuse and help you determine whether or not you may have a drug abuse problem.These questions are used by the Vanderbilt University Addiction Center. Learn more about putting this calculator or other calculators on your website.