DBT for Co-Occurring Disorders

Dialectical Behavior Therapy (DBT), developed by Marsha Linehan at the University of Washington, has one of the most robust evidence bases of any treatment for co-occurring disorders — particularly for borderline personality disorder with co-occurring substance use (DBT-SUD). Its central principle, the balance between acceptance and change, is especially well-suited to dual diagnosis populations where shame and self-invalidation are pervasive drivers of both psychiatric symptoms and substance use.

The Core Dialectic: Acceptance and Change

DBT holds two seemingly opposing truths simultaneously: patients are doing the best they can given their history and current circumstances, AND they need to change their behavior to build a life worth living. This balance matters enormously in dual diagnosis treatment — patients must be validated for the genuine difficulty of their situation while being coached to change the behaviors causing harm.

Standard DBT Components

• Individual therapy — Weekly sessions addressing motivation, skills generalization, and the DBT target behavior hierarchy: life-threatening behaviors first, then therapy-interfering behaviors, then quality-of-life-interfering behaviors
• Skills training group — Weekly group teaching the four skills modules
• Phone coaching — Between-session therapist contact for real-time skills coaching during crisis moments
• Therapist consultation team — Regular team meetings supporting therapist fidelity and preventing burnout

The Four DBT Skills Modules

Mindfulness

The foundation of all other skills — observing, describing, and participating in present-moment experience without judgment. In dual diagnosis treatment: observing cravings as temporary events rather than commands, and creating space between emotional trigger and behavioral response.

Distress Tolerance

Skills for surviving crisis moments without making things worse. TIPP skills (Temperature change, Intense exercise, Paced breathing, Progressive muscle relaxation), distraction, self-soothe, and radical acceptance. In addiction contexts, distress tolerance skills are the primary alternative to substance use as short-term coping.

Emotion Regulation

Skills for understanding emotions and reducing vulnerability to negative states. The ABC PLEASE module directly addresses substance use risk: accumulate Positives, Build Mastery, Cope Ahead; treat PhysicaL illness, balanced Eating, Avoid mood-altering drugs, balanced Sleep, Exercise.

Interpersonal Effectiveness

Skills for maintaining relationships while preserving self-respect — particularly important for BPD presentations where interpersonal crises frequently drive both psychiatric decompensation and substance use.

DBT-SUD: Specific Adaptations

Linehan and colleagues developed DBT-SUD with several key modifications for substance use contexts:

• Dialectical abstinence — Absolute commitment to abstinence combined with radical acceptance of relapse when it occurs, preventing the shame-driven abstinence violation effect
• Clear mind — The balance between "addict mind" (craving-driven) and "clean mind" (complacent abstinence) — abstinent but vigilant
• Burning bridges and building new ones — Eliminating access to substances while simultaneously building a life worth living

Multiple randomized controlled trials support DBT-SUD for BPD with co-occurring SUD, demonstrating reductions in drug use, suicide attempts, and psychiatric hospitalizations.

Related: BPD & Addiction · CBT for Dual Diagnosis · Trauma-Informed Care