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Twenty representative DSST Substance Abuse questions, each with the answer and a short explanation of why the wrong choices trap test-takers.
By Alex Stone6 min readLast fact-checked January 1970
Twenty practice questions for DSST Substance Abuse, in the real exam's style. Score 16 of 20 here and you are in passing range. Miss more than four, and the pattern of your misses points straight at the topic to review next. Every question below is explained on video, including why the wrong answers trap most test-takers.
What students preparing for this exam tell us is that steady practice in the exam's format, with an explanation for every miss, is what moves a score. Use these the same way: answer, check, and read why the wrong choices are tempting. For the full plan around them, see the DSST Substance Abuse pillar guide.
Watch the full video walkthrough above, then test yourself on the twenty questions below. Each one is explained on the video, including why the wrong answers trap most test-takers.
1. Alcohol, barbiturates, and benzodiazepines all belong to which class of drugs? Central Nervous System Depressants. Alcohol, barbiturates, and benzodiazepines all slow activity in the central nervous system, which is why they are grouped as depressants. They reduce arousal and can cause sedation, slowed breathing, and impaired coordination.
2. Cocaine and amphetamines produce their effects primarily by: Stimulating the Central Nervous System. Cocaine and amphetamines are stimulants. They speed up central nervous system activity, raising heart rate, blood pressure, and alertness, which is the opposite of what a depressant like alcohol does.
3. Heroin, morphine, and oxycodone are all examples of: Opioids. Heroin, morphine, and oxycodone are opioids, drugs that act on the body's opioid receptors to relieve pain and produce euphoria. Their danger lies in suppressing breathing, which is how an opioid overdose kills.
4. With repeated drug use, the surges of dopamine in the brain's reward circuit tend to: Reinforce Drug-seeking Behavior. Addictive drugs flood the reward circuit with dopamine, and that surge teaches the brain to repeat the behavior. Over time this powerful reinforcement drives compulsive drug seeking, the core of addiction.
5. LSD and psilocybin are classified as: Hallucinogens. LSD and psilocybin are hallucinogens. They distort perception, thought, and mood, producing altered sensory experiences rather than the sedation of a depressant or the arousal of a stimulant.
6. When a person needs progressively larger doses of a drug to achieve the same effect, they have developed: Tolerance. Tolerance means the body has adapted to a drug, so the usual dose no longer produces the original effect and more is needed. It is a hallmark of physical dependence and a step on the road to addiction.
7. Physical dependence is most clearly shown by the appearance of which symptoms when drug use stops? Withdrawal Symptoms. Physical dependence reveals itself through withdrawal: the body, adapted to the drug, reacts when the drug is removed. Symptoms like nausea, tremors, sweating, and anxiety signal that dependence has formed.
8. Which substance has a withdrawal syndrome that can include life-threatening seizures and delirium tremens? Alcohol. Alcohol withdrawal can be medically dangerous. In heavy, dependent drinkers it can progress to seizures and delirium tremens, a state of confusion and hallucination that can be fatal without care.
9. The difference between drug abuse and drug dependence is best described as: Dependence Involves Physical or Psychological Reliance on the Drug. Abuse is harmful or hazardous use of a substance, while dependence adds physical or psychological reliance, marked by tolerance, withdrawal, and an inability to control use despite consequences.
10. Cross-tolerance, in which tolerance to one drug carries over to another, is most common among drugs that: Act on the Same Biological System. Cross-tolerance happens because the body has adapted to a shared mechanism. Alcohol and benzodiazepines, both central nervous system depressants, show cross-tolerance since they act on the same system.
11. Long-term heavy alcohol use is a leading cause of which organ disease? Cirrhosis of the Liver. The liver bears the main burden of processing alcohol. Years of heavy drinking scar and destroy liver tissue, leading to cirrhosis, a major and often irreversible cause of alcohol-related death.
12. The primary addictive substance in tobacco is: Nicotine. Nicotine is the addictive chemical in tobacco. It reaches the brain within seconds of inhaling and drives dependence, while the tar and other byproducts of smoke cause much of the long-term disease.
13. A pregnant woman who drinks heavily risks causing which condition in her child? Fetal Alcohol Syndrome. Alcohol crosses the placenta and can harm a developing fetus. Heavy prenatal drinking can cause fetal alcohol syndrome, marked by growth problems, facial abnormalities, and lifelong learning disabilities.
14. The leading cause of death in an opioid overdose is: Respiratory Depression. Opioids suppress the brain centers that drive breathing. In an overdose, breathing slows and can stop entirely, so respiratory depression is what makes opioid overdose deadly.
15. The medication naloxone, often sold as Narcan, is used to: Reverse an Opioid Overdose. Naloxone rapidly blocks opioid receptors, reversing the dangerous breathing suppression of an opioid overdose. Given in time, it can restore breathing within minutes and save a life.
16. Alcoholics Anonymous and Narcotics Anonymous are best described as: Peer-based Mutual-support Groups. Alcoholics Anonymous and Narcotics Anonymous are mutual-support fellowships where peers in recovery help one another stay sober, most famously through a twelve-step program rather than medical treatment.
17. Methadone and buprenorphine are used in the treatment of opioid addiction because they: Reduce Cravings and Withdrawal Without the Strong High of Heroin. Methadone and buprenorphine act on opioid receptors to ease cravings and prevent withdrawal, allowing a person to function and stabilize without the intense high and crash of heroin.
18. Disulfiram, sold as Antabuse, discourages drinking by: Causing Unpleasant Reactions When Alcohol Is Consumed. Disulfiram blocks the normal breakdown of alcohol, so drinking causes flushing, nausea, and a racing heart. That unpleasant reaction is meant to deter a person from drinking at all.
19. A prevention program that teaches teenagers to recognize and resist peer pressure is an example of: Primary Prevention. Primary prevention aims to stop substance abuse before it ever starts. Teaching teens to resist peer pressure targets people who are not yet using, which is exactly what primary prevention does.
20. In addiction recovery, a return to substance use after a period of abstinence is called: Relapse. Relapse is a return to drug or alcohol use after a period of abstinence. It is common in recovery and is viewed as a setback to manage rather than a final failure, often prompting a return to treatment.
The point of twenty questions is not the twenty, it is the pattern. Mark which topic each miss came from, then spend your next session on that topic alone. None of it requires starting over, only tightening the spots that cost you points.
A single twenty-question set is a snapshot, not a study plan. To pass with margin you need volume: enough questions, in the exam's format, with explanations that turn a wrong answer into a correction. That is what Flying Prep's DSST Substance Abuse practice is built for: every question explained, with a free trial before you decide.
About 16. A passing score works out to roughly 80 percent, so clearing 16 of 20 consistently across a few sets puts you in passing range.
No. These are representative practice questions in the exam's style. The real exam draws from a much larger pool, which is why practice volume, not memorizing any single set, is what moves your score.
The Flying Prep DSST Substance Abuse question bank has every question explained and reviewed against the current outline. Start a free trial and drill the topics your misses point to.
Alex Stone founded Flying Prep after earning her bachelor's degree from Thomas Edison State University using 27 CLEP and DSST exams to test out of 99 credits. She built Flying Prep to help working adults and returning students take the same path.
See the full DSST Substance Abuse study guide for the practice quiz, study plan, and credit details.