Substance use on the exam: screening, withdrawal, levels of care and the diagnosis.
CAGE and AUDIT, which withdrawals are dangerous, ASAM levels and the eleven DSM criteria. The clinical facts the cases assume.
By Dr. Andrew Wichterman · September 15, 2026 · 6 min read
Substance use appears in a large share of NCMHCE cases and in the NCE clinical focus area. The exam assumes a set of clinical facts that counseling programs do not always teach directly. Here they are.
Screening
CAGE (four questions; two positives suggest a problem), AUDIT (ten items, for alcohol), DAST (drugs), MAST, SASSI, and for adolescents the CRAFFT. Screening is not diagnosis. A positive screen leads to a fuller assessment: quantity, frequency, pattern, consequences, prior treatment, withdrawal history, and co-occurring conditions.
The DSM-5-TR diagnosis
Substance use disorder is one diagnosis per substance, on a continuum. Eleven criteria in four clusters: impaired control (using more or longer than intended, failed attempts to cut down, time spent, craving), social impairment (role failures, interpersonal problems, giving up activities), risky use (hazardous situations, continued use despite physical or psychological problems), and pharmacological (tolerance, withdrawal). Two or three criteria is mild, four or five moderate, six or more severe, within a twelve-month period. Tolerance and withdrawal do not count when the substance is a prescribed medication taken as directed. "Abuse" and "dependence" are no longer diagnoses.
Which withdrawals are medical emergencies
- Alcohol and benzodiazepines / sedatives: withdrawal can cause seizures and delirium tremens and can be fatal. Medically supervised detoxification is required. An option that has a heavy daily drinker stop abruptly without medical support is wrong.
- Opioids: withdrawal is intensely uncomfortable but rarely fatal in itself; the danger is overdose after a period of abstinence lowers tolerance. Medication-assisted treatment (buprenorphine, methadone, naltrexone) is standard of care, and the exam expects you to support it, not oppose it.
- Stimulants: the crash includes depression and suicidal ideation; assess for risk.
- Cannabis, nicotine: uncomfortable, not dangerous.
Levels of care
The ASAM criteria describe a continuum: early intervention (0.5), outpatient (1), intensive outpatient and partial hospitalization (2), residential (3), medically managed intensive inpatient (4). Placement depends on six dimensions including withdrawal potential, medical and psychiatric conditions, readiness, relapse potential and recovery environment. The case expects the least restrictive level that is safe. Someone with a dangerous withdrawal profile goes to a medical setting first.
Treatment approaches the exam recognizes
Motivational interviewing, cognitive behavioral relapse prevention (Marlatt), contingency management, twelve-step facilitation and mutual help groups (AA, NA, SMART Recovery), family involvement (Al-Anon, CRAFT), and harm reduction. Co-occurring disorders are treated in an integrated way, not sequentially. Confidentiality of substance use treatment records has extra federal protection under 42 CFR Part 2.
Practice this. The flashcards and practice tests on this site are sorted by content area, so you can drill this one until it holds.
Screen, assess, diagnose on the continuum, know which withdrawals need a doctor, place at the least restrictive safe level. That is the clinical spine of every substance case.