DSM-5 TR: Understanding Substance Use Disorders, Behavioral Addictions, and Diagnostic Criteria

This podcast episode, hosted by Dr. Donnelly Snipes, provides a comprehensive overview of substance use disorders and behavioral addictions as defined by the DSM-5 TR. It begins by clarifying critical terminology, distinguishing between dependence and addiction, noting that dependence alone does not constitute addiction unless it causes clinically significant distress or impairment. The episode emphasizes the shift in diagnostic language from "substance abuse" and "substance dependence" to the unified "substance use disorder" (SUD), which applies to various substance categories like alcohol, stimulants, cannabis, and depressants. It also highlights specific conditions like hallucinogen persisting perception disorder, which is unique to hallucinogen use and involves persistent perceptual changes with intact reality testing.

The core diagnostic criteria for Substance Use Disorder are detailed, including excessive time spent obtaining/using/recovering, using greater amounts than intended, inability to cut down, craving, failure to fulfill major role obligations, giving up important activities, continued use despite problems, and using in hazardous situations. The concepts of tolerance (diminished effect at the same level) and withdrawal (symptoms opposite to intoxication, often with similar intensity) are thoroughly explained, with examples of how the brain's neurochemistry (dopamine, endorphins, HPA axis) adapts to substance use and withdrawal. The discussion extends to behavioral addictions, with gambling disorder being fully integrated into the DSM-5 TR, sharing many symptomatic parallels with SUDs, such as tolerance, withdrawal-like irritability, preoccupation, and negative life consequences.

Dr. Snipes also addresses conditions like internet gaming disorder and compulsive sexual behavior disorder (porn/sex addiction), noting their status as "conditions for further study" in the DSM-5 TR but their inclusion in the ICD-11. This distinction is crucial for billing and insurance coverage, underscoring the ethical responsibility of providers to ensure informed consent regarding reimbursement. The episode provides practical clinical insights, such as using a DSM-5 TR table for identifying co-occurring mental health issues during substance abuse assessments and observing physical signs like pupil dilation (stimulants) versus constriction (opioids) as quick indicators of intoxication.

Finally, the presentation delves into the specific symptoms of intoxication and withdrawal for stimulants and depressants. Stimulant intoxication is characterized by pupil dilation, tachycardia, elevated blood pressure, and psychomotor agitation, while withdrawal involves dysphoric mood, fatigue, and hypersomnia. Depressant intoxication presents with pupil constriction, slurred speech, and drowsiness, with withdrawal leading to autonomic hyperactivity, tremors, insomnia, and potentially seizures. The episode consistently emphasizes the continuum of use, from non-problematic to pathological, and the complex interplay of psychological and biochemical factors driving addictive behaviors, highlighting the pervasive impact of these disorders on an individual's life and functioning.