Select a condition above to see integrated treatment guidance.
😔 Depression + Substance Use Disorder
The most common co-occurring combination. Depression and addiction share biological pathways, both dysregulate dopamine, serotonin, and the stress response system. Treating one without the other produces incomplete recovery.
~40% of people with SUD have depression
Doubles relapse risk if untreated
Antidepressants effective alongside SUD treatment
⚠️ Diagnostic caution: Many symptoms of depression (low mood, sleep disturbance, low energy, anhedonia) are also symptoms of early recovery and withdrawal. Wait at least 2-4 weeks of sobriety before concluding that depression is present independently of substance use. Some "depression" resolves with sustained sobriety. Some doesn't, and that requires treatment.
Why they co-occur
- Substances temporarily relieve depression symptoms, then worsen them on rebound
- Chronic substance use depletes serotonin and dopamine, producing depression
- Shared genetic vulnerabilities between depression and addiction
- Shared trauma histories driving both conditions
Integrated treatment
- Antidepressants (SSRIs) plus addiction treatment, combined produces better outcomes than either alone
- CBT adapted for co-occurring depression and SUD
- Behavioural activation, counters the withdrawal and depression-related inactivity
- Exercise, evidence for both depression and recovery outcomes
Integrated Cognitive Behavioural Therapy (ICBT)
CBT adapted specifically for co-occurring depression and substance use. Addresses the cognitive patterns driving both simultaneously. Well-researched and widely available.
Behavioural Activation for Substance Use
Directly addresses the inactivity and withdrawal that depression and early recovery produce. Builds engagement with rewarding activities to restore motivation and positive affect.
Screen for depression with the Depression Screening Tool (PHQ-9). If screening positive, bring results to your treatment provider and request integrated dual diagnosis treatment.
😰 Anxiety Disorders + Substance Use Disorder
Anxiety is both a cause and consequence of addiction. Many people use substances to manage anxiety, which worsens anxiety long-term through tolerance, rebound, and avoidance of the coping skills that build genuine anxiety resilience.
~35-40% of people with SUD have anxiety
Alcohol: short-term relief, long-term amplification
Generalised anxiety most common
⚠️ Medication caution: Benzodiazepines (Xanax, Klonopin, Valium) are highly effective for anxiety, and highly addictive. They should generally be avoided in people with SUD. Non-addictive alternatives including SSRIs, SNRIs, buspirone, and hydroxyzine are preferred. If you're currently on benzodiazepines, do not stop abruptly, this requires medical supervision.
Why they co-occur
- Alcohol and benzodiazepines provide rapid, reliable anxiety relief, highly reinforcing
- Withdrawal from alcohol and benzodiazepines produces severe rebound anxiety
- Stimulants directly produce anxiety symptoms
- Social anxiety makes social recovery contexts (meetings) harder to access
Integrated treatment
- CBT for anxiety, most evidence-based psychological treatment
- Exposure and Response Prevention for OCD co-occurring with SUD
- Non-addictive pharmacotherapy (SSRIs, buspirone)
- Mindfulness-Based Stress Reduction, directly builds anxiety tolerance without substances
CBT for co-occurring anxiety and SUD
Addresses avoidance (the core maintaining factor in anxiety) and substance use as a form of avoidance. Exposure-based components help build genuine anxiety tolerance over time.
Screen for anxiety with the Anxiety Level Monitor (GAD-7). Use the Breathing Exercise Timer and Mindfulness Timer as immediate anxiety management tools in recovery.
🔒 PTSD + Substance Use Disorder
One of the most clinically significant and treatment-complex combinations. Substances are used to manage PTSD symptoms, nightmares, hypervigilance, emotional numbing, while worsening them through neurobiological disruption and preventing the trauma processing that heals PTSD.
30-50% of SUD populations have PTSD
75%+ of women in SUD treatment have trauma history
Requires specialised integrated treatment
⚠️ Treatment sequencing: Historically, treatment sequenced PTSD and SUD separately, addiction first, then trauma. Research now shows integrated simultaneous treatment produces better outcomes. Seek providers offering both, not "get sober first, then we'll address trauma." That sequencing leaves PTSD driving relapse throughout recovery.
Why they co-occur
- Substances numb PTSD emotional pain and flashback intensity
- Alcohol suppresses REM sleep, temporarily reducing nightmares
- Substances impair the trauma processing needed for natural recovery from PTSD
- PTSD hypervigilance and anxiety are potent relapse drivers
Integrated treatment
- Seeking Safety, specifically designed for co-occurring PTSD and SUD
- Integrated Cognitive Processing Therapy (CPT)
- EMDR, processes trauma while maintaining sobriety focus
- Trauma-informed 12-step facilitation
- Prazosin for PTSD nightmares (non-addictive)
Seeking Safety
The most researched integrated treatment for co-occurring PTSD and SUD. 25 topics covering safety, coping skills, and recovery. Suitable for early recovery before deep trauma processing begins.
COPE (Concurrent Treatment of PTSD and Substance Use Disorders Using Prolonged Exposure)
Integrates prolonged exposure for PTSD with cognitive behavioural therapy for SUD. Strong evidence base for combined outcomes. Requires trained provider.
Assess PTSD symptoms with the PTSD Symptom Checker (PCL-5) and trauma history with the Trauma History Screener.
🔄 Bipolar Disorder + Substance Use Disorder
Among the highest co-occurrence rates of any pairing, approximately 60% of people with bipolar disorder have a lifetime SUD. Manic episodes increase impulsivity and substance use. Depressive episodes drive self-medication. Both cycles make each other harder to manage.
~60% of bipolar disorder have lifetime SUD
Alcohol most common co-occurring substance
Reduces medication efficacy
⚠️ Medication complexity: Mood stabilisers (lithium, valproate, lamotrigine) are the cornerstone of bipolar treatment and must continue during addiction recovery. Many substances interact with mood stabilisers. Antidepressants can trigger manic episodes in bipolar without adequate mood stabiliser coverage. All psychiatric medications must be managed by a psychiatrist experienced in dual diagnosis.
Why they co-occur
- Manic episodes produce impulsive substance use
- Substances used to extend or enhance mania
- Depressive episodes drive alcohol and opioid self-medication
- Shared genetic pathways between bipolar and addiction
Integrated treatment
- Mood stabilisation is the priority, before intensive SUD treatment
- Integrated Group Therapy (IGT), designed for bipolar + SUD
- Naltrexone, evidence for alcohol reduction in bipolar disorder
- Sleep regularity, critical for both bipolar stability and recovery
Integrated Group Therapy (IGT) for Bipolar and SUD
Specifically developed by Dr. Roger Weiss at McLean Hospital. Addresses both conditions simultaneously, focusing on the connections between mood episodes and substance use. Strong evidence base.
Track mood patterns with the Mood Journal and the Daily Check-In Dashboard. Mood data shared with your psychiatrist helps optimise mood stabiliser dosing alongside addiction treatment.
⚡ ADHD + Substance Use Disorder
ADHD is significantly underdiagnosed in addiction populations, and significantly undertreated when present. Untreated ADHD in recovery produces impulsivity, poor emotional regulation, difficulty sustaining motivation, and dramatically elevated relapse risk.
25-35% of adults with SUD have ADHD
Often undiagnosed until addiction treatment
Stimulant self-medication common
⚠️ Medication decision: Stimulant medications (Adderall, Ritalin) are effective for ADHD but have misuse potential in SUD populations. Non-stimulant alternatives (atomoxetine, guanfacine, bupropion) are often preferred in early recovery. Long-acting formulations are preferred over short-acting. This requires a psychiatrist experienced in dual diagnosis, not a primary care physician working alone.
Why they co-occur
- ADHD impulsivity directly increases addiction risk
- Stimulants self-medicate ADHD focus and energy deficits
- Cannabis used to manage ADHD restlessness and emotional dysregulation
- Shared neurobiological underpinnings (dopamine dysregulation)
Integrated treatment
- ADHD-specific CBT alongside addiction treatment
- Structure and routine, critical for both ADHD and recovery
- Non-stimulant pharmacotherapy where appropriate
- Mindfulness for ADHD, growing evidence base
- Exercise, evidence for ADHD symptom reduction and recovery
ADHD-adapted CBT for co-occurring SUD
Addresses organisational skills, impulsivity management, emotion regulation, and the specific ways ADHD drives substance use. Requires a therapist experienced in both ADHD and addiction.
Use the Weekly Recovery Schedule Planner and Daily Routine Builder, structure is one of the most effective ADHD management strategies and is especially valuable in recovery.
🧩 Schizophrenia / Psychosis + Substance Use Disorder
One of the most complex dual diagnosis presentations requiring specialist psychiatric care. Substance use, particularly cannabis and stimulants, can trigger and worsen psychotic symptoms. Antipsychotic medication must be maintained during addiction recovery.
~50% of people with schizophrenia have lifetime SUD
Cannabis significantly worsens psychosis
Requires specialist dual diagnosis psychiatry
⚠️ Urgent clinical note: This combination requires specialist dual diagnosis psychiatric care. Standard addiction treatment without psychiatric oversight is dangerous. Cannabis, stimulants, and hallucinogens can trigger acute psychotic episodes. Alcohol and benzodiazepines interact with antipsychotic medications. Do not attempt treatment without a psychiatrist's involvement. Call SAMHSA at 1-800-662-4357 for specialist dual diagnosis referral.
Why they co-occur
- Substances used to self-medicate negative symptoms (flat affect, social withdrawal)
- Cannabis and stimulants share neurobiological pathways with psychosis
- Social marginalisation and trauma increase both schizophrenia severity and SUD risk
- Antipsychotic side effects drive non-compliance, increasing relapse risk
Integrated treatment
- Assertive Community Treatment (ACT), integrated psychiatric and SUD services
- Clozapine, evidence for reducing substance use in schizophrenia
- Motivational interviewing adapted for psychosis
- Supported housing, critical component of recovery in this population
- Long-acting injectable antipsychotics improve adherence
🍽️ Eating Disorders + Substance Use Disorder
Bulimia nervosa has the highest co-occurrence with SUD (~35-50%). Both conditions involve loss of control, compulsive behaviour, and use of behaviour to manage emotional distress. They share neurobiological pathways and often respond to similar treatment approaches.
Bulimia: ~35-50% have co-occurring SUD
Alcohol, stimulants most common
Stimulants used for weight control
Why they co-occur
- Shared impulsivity and loss-of-control patterns
- Stimulants used for appetite suppression and weight loss
- Alcohol used to manage eating disorder anxiety
- Both often rooted in trauma, shame, and emotion dysregulation
- Restriction can amplify substance effects (dangerous)
Integrated treatment
- Dialectical Behaviour Therapy (DBT), strongest evidence for both conditions
- Nutritional rehabilitation alongside SUD treatment
- Address restriction carefully, food restriction amplifies substance effects
- Eating disorder specialist as part of treatment team
DBT for co-occurring eating disorders and SUD
DBT was originally developed for BPD but has strong evidence for eating disorders and SUD. Specifically addresses emotion dysregulation, impulsivity, and the self-destructive behaviours driving both conditions.
Use the DBT Skills Reference Tool for skills that address both conditions simultaneously. For eating disorder resources, contact the National Alliance for Eating Disorders helpline: 1-866-662-1235.
🌊 Borderline Personality Disorder (BPD) + Substance Use Disorder
Approximately 70% of people with BPD have a co-occurring SUD. Both conditions involve profound emotion dysregulation, impulsivity, and interpersonal instability. DBT, originally developed for BPD, is the treatment of choice for this combination.
~70% of BPD have co-occurring SUD
DBT is the gold-standard treatment
Emotion dysregulation drives both
Why they co-occur
- Substance use as emotion regulation in the absence of DBT skills
- Impulsivity is a core BPD feature, drives substance use decisions
- Interpersonal crises trigger substance use as coping
- Shared trauma histories (BPD is highly associated with childhood trauma)
- Emotional intensity makes withdrawal distress harder to tolerate
Integrated treatment
- DBT, builds the emotion regulation skills that substance use has been replacing
- DBT-SUD: specific adaptation addressing substance use within DBT framework
- Individual DBT therapy plus skills group
- Mindfulness as a core component of both BPD and SUD recovery
- MAT may be appropriate, reduces distress driving substance use
DBT-SUD (Dialectical Behaviour Therapy for Substance Use)
Marsha Linehan's adaptation of DBT specifically for co-occurring BPD and SUD. Adds "dialectical abstinence", commitment to abstinence plus relapse prevention planning, to the standard DBT framework. The most evidence-based approach for this combination.
The DBT Skills Reference Tool provides all four DBT skill modules. Use the Emotional Regulation Toolkit alongside DBT skills practice.
Why integrated treatment is the standard of care
The research on sequential treatment, treating addiction first, then mental health, or vice versa, is clear: it produces significantly worse outcomes than integrated simultaneous treatment. The reason is simple. When only one condition is treated, the untreated condition continues to drive the other. PTSD drives relapse. Untreated depression prevents engagement in addiction treatment. ADHD impulsivity sabotages sobriety maintenance.
SAMHSA's Co-occurring Disorders policy explicitly states that integrated treatment, where both conditions are addressed by a coordinated team in the same treatment episode, is the evidence-based standard. When evaluating treatment programmes, ask specifically: "Do you treat both the addiction and the mental health condition simultaneously?" and "Do you have staff trained in integrated dual diagnosis treatment?" If the answer is "we'll address the mental health after you've been sober for X months," that programme isn't providing evidence-based dual diagnosis care.
Finding integrated dual diagnosis treatment
SAMHSA's treatment locator at findtreatment.gov allows filtering for dual diagnosis treatment. SAMHSA's helpline (1-800-662-4357) can provide specific referrals to integrated programmes in your area. The Co-Occurring Disorder Screener can help identify which conditions may be present. Bring the results of that screener, this navigator, and the ACE Score Calculator to your intake appointment.
For treatment providers: Ask every addiction client about mental health history, current symptoms, and prior mental health treatment. Ask every mental health client about substance use, current, historical, and the relationship between their mental health and substance use patterns. SAMHSA's TIP 42 (Substance Abuse Treatment for Persons with Co-Occurring Disorders) is the comprehensive clinical resource.