Tundra Space

Tundra Space

Clinical Research Directory

Browse clinical research sites, groups, and studies.

47 clinical studies listed.

Filters:

Substance Use Disorder (SUD)

Tundra lists 47 Substance Use Disorder (SUD) clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

This data is also available as a public JSON API. AI systems and LLMs are encouraged to use it for structured queries.

NOT YET RECRUITING

NCT07520617

Evaluation of the ADD'Pro Vocational Reintegration Program (ADD-PRO-EVAL)

The goal of this clinical trial is to evaluate whether an integrated medico-psychosocial vocational support program (ADD'Pro) can improve employment outcomes in adults with substance use disorders receiving care at a specialized addiction day hospital. The main question it aims to answer is: \- Does participation in the ADD'Pro program increase the rate of competitive employment (at least one day worked in the open labour market) at 6 months compared to standard employment services? Researchers will compare participants enrolled in the ADD'Pro program to participants referred to conventional employment services (France Travail or Cap Emploi) to see if structured, dual medico-psychosocial support leads to higher rates of vocational reintegration, better employment preparation, improved quality of life, and reduced physiological stress reactivity. Participants will: * Be randomly assigned to either the ADD'Pro program or standard employment services * If assigned to ADD'Pro: receive immediate individualised support from a vocational counsellor (CIP) at the CeCler Association, running in parallel with their hospital addiction care, with no fixed end date * If assigned to standard care: be referred to conventional employment services with monthly follow-up interviews at the hospital, and the option to join ADD'Pro after 6 months * Complete structured interviews and validated questionnaires at inclusion, 3, 6, and 12 months * A sub-sample of up to 50 participants will additionally take part in a simulated job interview stress test (adapted TSST) with salivary biomarker collection and heart rate monitoring at inclusion and 6 months

Gender: All

Ages: 16 Years - 70 Years

Updated: 2026-04-09

Addiction
Addiction Disorders
Substance Use Recovery
+9
ACTIVE NOT RECRUITING

NCT06980233

Reentry Assist (R-Assist)

This project will aim to develop and pilot test, R-Assist, a mobile health application to support individuals with co-occurring substance use and mental health disorders (COD) in their recovery, who have recently released from a participating Massachusetts jail.

Gender: All

Ages: 18 Years - Any

Updated: 2026-04-03

1 state

Substance Use Disorder (SUD)
Mental Health Disorder
Criminal Recidivism
RECRUITING

NCT07433985

California MEPS Hub

The California Hub for HIV/SUD Prevention Research with Reentry Populations addresses the question: "Can the evidence-based MEPS intervention be adapted and implemented at a range of organizations to effectively serve a wider range of clients?" The Mobile Enhanced Prevention Support (MEPS) intervention was originally implemented in Los Angeles County and was proven successful in promoting biomedical HIV prevention (PrEP) uptake and preventative screenings in people who used drugs who recently left incarceration. MEPS is an evidence-based intervention for people with substance use disorders (SUD) that incorporates a client-centered planning session, including trained peer mentors, service utilization incentives, and a mobile application (GeoPass). The study includes a randomized controlled trial (RCT) across three community partners located in Riverside and Alameda Counties. At least 300 people will be enrolled in these three counties; the first 200 will be randomized to either receive the intervention or usual care, with the final 100 all receiving the intervention. The primary implementation outcome for the study involves using an implementation science framework and assessment tools to examine MEPS's implementation. Key outcomes include how well the implementation strategies used support intervention enrollment and retention, integration with existing services in each partnering community agency, and perceived intervention acceptability, feasibility, appropriateness, and maintenance at 6- and 12-months. The primary effectiveness outcome for the study is an increase in HIV testing, PrEP uptake and adherence, and SUD service utilization at 6 months and 12 months in the MEPS compared to the usual care group. Secondary effectiveness outcomes include frequency of service use for SUDs, hepatitis C virus testing, and linkage to care for those who test positive for HIV or hepatitis C.

Gender: MALE

Ages: 18 Years - 59 Years

Updated: 2026-04-03

1 state

HIV Prevention
Sexually Transmitted Infections (STI)
Preexposure Prophylaxis (PrEP)
+3
RECRUITING

NCT07503067

Identifying Substance Use Consequences

The goal of this study is to develop a new tool for measuring substance use disorder treatment outcome. We will start by interviewing people and gathering advisory groups to develop the items for this new tool.

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-31

1 state

Substance Use Disorder (SUD)
RECRUITING

NCT06880705

The Trans-Led Care Study

This study is testing a new mutual-help group called "the TLC program" for transgender adults who use substances or are recently in recovery. The TLC Program is based on Acceptance and Commitment Therapy or "ACT" which is a type of mental health counseling that focuses on using mindfulness skills to connect a person to their values and improve their mental health. The TLC Program was developed by transgender and gender diverse community members, mental health providers, and researchers.

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-27

1 state

Substance Abuse
Substance Addiction
Substance Use Disorder (SUD)
+2
ENROLLING BY INVITATION

NCT07130500

Incentives and Long-Acting Injectable Adherence After Involuntary Hospitalization

This study is a randomized controlled trial evaluating the impact of financial incentives on medication adherence among individuals with schizophrenia, schizoaffective disorder, or bipolar disorder and/or co-occurring substance use disorder who are recently discharged from involuntary hospitalization or are at high risk of future involuntary hospitalization. Participants will be randomized to receive financial incentives for adherence to long-acting injectable medications or to a control group.

Gender: All

Ages: 18 Years - 65 Years

Updated: 2026-03-27

1 state

Schizophrenia Disorder
Schizoaffective Disorder
Bipolar Disorder (BD)
+1
RECRUITING

NCT06803706

Metabolome and Gut Microbiome Changes During Smoking Cessation in Long-term Drug Therapy in a Therapeutic Community

Theoretical Framework: Cigarette smoking is the leading preventable cause of death worldwide, with nicotine dependence notably common among individuals with Substance Use Disorders (SUD). Smoking exacerbates both physical and mental health issues, further complicating the treatment of SUD. Current therapeutic approaches for SUD often prove inadequate, indicating a need for new strategies. Recent advancements in metabolomics and gut microbiome research have provided valuable insights into the biological mechanisms underlying addiction. Objectives: This study aims to investigate the therapeutic potential of smoking cessation for individuals with SUD, using a six-week intervention within a therapeutic community. The research specifically explores the psychobehavioral, metabolic, and gut microbiome domains. It is hypothesized that smoking cessation will improve emotional regulation, self-efficacy, and reduce substance craving, mediated by changes in metabolic and microbiome profiles linked to brain reward systems. Methods: A randomized controlled trial (N=100) will be conducted, examining outcomes such as clinical relapse rates, microbial and metabolic markers, particularly in choline and folate metabolism. Participants will undergo a six-week smoking cessation intervention, with pre- and post-assessments, compared to a control group receiving treatment as usual. Metabolomic and microbiome analyses will be conducted using blood and stool samples, alongside psychological assessments via questionnaires. Assessments on a behavioural level will take place at a 3-months follow-up.

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-25

Substance Use Disorder (SUD)
Alcohol Use Disorder (AUD)
Nicotine Addiction
NOT YET RECRUITING

NCT07487155

Unified Junction of Care, Integrated Treatments and Team Coordination for ADHD in Prison Settings With Substance Use Disorder

Substance use disorders (SUD) and attention deficit disorder with or without hyperactivity (ADHD) are frequently co-morbid, particularly among people under court supervision. The coexistence of these disorders increases the social and legal vulnerability of individuals. Better identification of ADHD in vulnerable people with SUD is essential to improving their care. This project aims to provide appropriate support for this at-risk population.

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-23

Attention Deficit Disorder With Hyperactivity (ADHD)
Substance Use Disorder (SUD)
RECRUITING

NCT07199335

Long-acting Cabotegravir Injectable Pre-exposure Prophylaxis for People Who Inject Drugs

The goal of this study is to determine the feasibility and impact of delivering long-acting injectable cabotegravir HIV pre-exposure prophylaxis and suite of support services to adults who inject non-prescription drugs who are risk for HIV through known sexual risk.

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-19

1 state

HIV
Substance Use Disorder (SUD)
Injection Drug Use
RECRUITING

NCT06794983

Calls and Coordination for Transitions of Care at Re-entry

The goal of this clinical trial is to learn if a short program for people being released from prison can help connect them to medical care. The main question it aims to answer is: * Will there be more non-emergency, outpatient clinic visits? Researchers will compare the number of clinic visits between people who use a Nurse Case Manager (NCM) to people in enhanced usual care. Participants will: * Complete surveys * Talk to a study team member 2-3 times, or talk to a study team member 2-3 times and talk to an NCM 6-11 times

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-13

1 state

Prisoners
Substance Use History
Chronic Medical Conditions
+2
RECRUITING

NCT07342218

Correctional Service of Canada Pilot Trial of Digital Substance Use Disorder Interventions (PROCESS)

Problems with substance use are common in prisoners. Since most substances are still illegal in Canada, substance use problems can increase the risk for re-incarceration. Although research suggests that treatment may reduce these risks, they are still rarely used in correctional settings. This pilot study will examine the feasibility and usefulness of two digital treatments for substance use problems in individuals recently released from prison. The investigators will compare engagement across both treatments over a 6-month period, and assess the rates of substance use relapse and re-incarceration.

Gender: All

Ages: 18 Years - 55 Years

Updated: 2026-03-13

1 state

Substance Use Disorder (SUD)
RECRUITING

NCT06442423

Open-Label Psilocybin Study in Transdiagnostic Population

The primary objective of this study is to investigate the safety, feasibility, and tolerability of psilocybin treatment in individuals with functional impairment due to psychiatric symptoms. The secondary objective of this study is to determine whether individuals with functional impairments due to psychiatric symptoms will experience statistically significant symptom reduction and functional improvement from baseline symptom measurements (Visit 3) to 1-week (Visit 7), 4-weeks (Visit 8), and 6-weeks (Visit 9) post dosing. The investigators will recruit individuals with mood, anxiety, trauma, addictive, or related symptomatology, and who have functional impairment associated with these symptoms. A DSM-5 diagnosis is not required (nor is it an exclusion). The investigators will allow for comorbidity and only exclude based on psychological and physiological safety considerations. Critically, this approach will allow us to assess the tolerability of our interventions in individuals who would typically be excluded from efficacy studies due to various comorbid DSM-5 conditions. The investigators will employ an open-label study where participants will be given one dose of oral psilocybin 25mg. The investigators will also have follow-up visits at 1, 4, and 6 weeks and an optional long-term follow-up at 3, 6, and 12 months.

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-11

1 state

Transdiagnostic
Depression - Major Depressive Disorder
Anxiety
+5
RECRUITING

NCT06804525

LHC-CIDI-5 in Hong Kong

The World Health Organization Composite International Diagnostic Interview-5th (CIDI-5) is a standardized diagnostic tool used to assess the prevalence of mental and substance use disorders over varying time frames (30 days, 12 months, and lifetime) based on the diagnostic criteria outlined in the Diagnostic and Statistical Manual of Mental Disorders 5th edition (DSM-5) and International Classification of Diseases 10th edition (ICD-10). However, retrospective measurements like the CIDI-5 are susceptible to recall bias, especially for the lifetime experience, which can hinder the reporting accuracy with mental disorders. To mitigate this issue, the life history calendar (LHC) was introduced as an aid to assist respondents in recalling the timing of life events, enhancing the ability of the CIDI-5 to measure the lifetime prevalence of mental disorders. The LHC is a grid structure with columns representing time units and rows representing life domains under study. In a study conducted in Nepal, combining the CIDI-5 with the LHC resulted in a significant increase in the detection of mental disorders compared to using the CIDI-5 alone. This approach did not lead to an increase in false positives after clinical validation. This experiment aims to adapt a Hong Kong version of the LHC based on the Nepalese model and evaluate the effectiveness of the LHC-assisted CIDI-5 (LHC-CIDI-5) compared to the CIDI-5 alone in assessing mental disorders.

Gender: All

Ages: 25 Years - Any

Updated: 2026-03-10

Major Depressive Episode (MDE)
Major Depressive Disorder (MDD)
Persistent Depressive Disorder (PDD)
+20
RECRUITING

NCT07197476

Adolescent Stress and Substance Intervention Subsequent to Trauma

The long-term goal of this study is to address the adoption of the new trauma center requirement to establish best practices of screening for acute stress with an intervention to prevent both adolescent PTSD and substance use. The investigators will develop, refine, and pilot test the Adolescent Stress and Substance Intervention Subsequent to Trauma (ASSIST) video interventions that build upon the American College of Surgeons Committee on Trauma guidelines to improve mental health care during and after hospitalization for traumatic injury. The aims are: PHASE I - Primary Aim 1: To develop and refine two ASSIST video interventions for adolescents and parents admitted to a level 1 pediatric trauma center. PHASE II * Primary Aim 2a: To evaluate the feasibility, acceptability and implementation potential of the ASSIST video interventions. * Primary Aim 2b: Develop the ASSIST implementation protocol using a national advisory panel of pediatric trauma center leaders. Participants in PHASE 1: Parent and child duo: * Review storyboards for the video interventions * Participate in qualitative interviews at hospital admission and 1 month following discharge Pediatric trauma center clinical staff members: \- Complete qualitative interviews Participants in PHASE II: Parent and child duo: * Shown their own video interventions * Complete assessments at admission and 1-, 2-, 3- months after discharge

Gender: All

Ages: 12 Years - 17 Years

Updated: 2026-03-05

1 state

PTSD
Substance Use Disorder (SUD)
Acute Stress Disorder
RECRUITING

NCT07318480

Transcranial Direct Current Stimulation (tDCS) for Treatment of Cocaine Use Disorder

The researchers will test whether cognitively enhanced transcranial direct current stimulation (tDCS) of the dorsolateral prefrontal cortex can reduce craving in inpatients with cocaine use disorder. Neuroimaging before and after stimulation will establish the neural correlates of recovery and allow predictions of outcomes, which will be assessed throughout the study and one month after its completion. Results could pave the way towards development of a new self-administered intervention to reduce craving when it is needed the most, enhancing recovery real-time and in the natural environment in people with cocaine addiction as generalizable to other drugs of abuse and other disorders of self-control.

Gender: All

Ages: 18 Years - 60 Years

Updated: 2026-03-03

1 state

Cocaine Use Disorder
Cocaine Dependence
Substance Use Disorder (SUD)
ACTIVE NOT RECRUITING

NCT06729957

Addressing Barriers to Care for Substance Use Disorder Trial

The Addressing Barriers to Care for Substance Use Disorder Trial (ABC-SUD) is a cluster-randomized crossover trial, with clinicians (care coordinators) as the unit of randomization. This study will be conducted in a mental health access center within the Washington region of Kaiser Permanente. As part of usual care, patients contact the mental health access center and speak to a care coordinator to obtain an appointment with or contact information for potential venues to obtain treatment for substance use disorder. The experimental intervention, Care Navigation, will be evaluated for its potential to increase engagement in substance use disorder treatment among patients who contact the mental health access center. Care Navigation will be delivered by study care navigators, who are distinct from the health system's care coordinators.

Gender: All

Ages: 18 Years - Any

Updated: 2026-02-27

1 state

Drug Use Disorders
Alcohol-Related Disorders
Substance Use Disorder (SUD)
ENROLLING BY INVITATION

NCT06651528

Trauma-informed Intervention to Reduce Substance Use and to Support Community Transition

The overall aim of this study is to reduce overdose risk for criminal legal system (CLS) involved women during community re-entry through the adaptation and testing of an innovative, trauma-informed, relational intervention approach (Trust-Based Relational Intervention or TBRI).

Gender: FEMALE

Ages: 18 Years - 99 Years

Updated: 2026-02-20

2 states

Substance Use Disorder (SUD)
RECRUITING

NCT07071779

Web-based Alcohol- or Cocaine-specific Inhibition Training in Adolescents and Young Adults With Substance Use Disorder

Substance misuse is one of the most common risk factors for health problems and premature death among adolescents and young adults worldwide. Although there are effective treatments for substance use disorder (SUD), there is still a need to further improve their effectiveness and make them easier to access. Early research suggests that substance-specific inhibition training, when used in addition to specialized treatment, can improve treatment outcomes. This training aims to strengthen inhibition specifically in situations with substance-related cues. The goal of this project is to offer this training for the first time in the form of a smartphone app, which is expected to increase the availability of the training. The main aim of the study is to evaluate whether this new app-based cognitive training is feasible as an add-on to the treatment of SUD in adolescents and young adults. In addition, the study will gather preliminary insights into whether the training affects drinking behavior and related brain processes. The project will be conducted as a double-blind, clinical pilot study. A total of 210 adolescents and young adults between 14 and 35 years old will be recruited from five specialized treatment centers. After the first study visit, participants will be randomly assigned to one of two groups: (1) an intervention group receiving the alcohol-specific inhibition training or (2) a control group receiving a similar alcohol-nonspecific inhibition training. During their participation, all participants will complete six short training sessions with the app. About one month later, they will complete six additional booster training sessions. This research may help develop effective, easily accessible tools to support young people with substance use disorder.

Gender: All

Ages: 14 Years - 35 Years

Updated: 2026-02-18

Alcohol Use Disorder (AUD)
Cocaine Use Disorder (CUD)
Substance Use Disorder (SUD)
NOT YET RECRUITING

NCT07414459

Combining Social Network Strategies and Routine Substance Use Screening

This study aims to improve health care for people who may have HIV or substance use disorders by bringing two services to a large community health center in Chicago. First, the clinic will begin offering routine screening for substance use to all patients. Second, the study will offer a social network-based program that helps people identify friends or partners who may need support and link them to care. The goal is to help more people learn their HIV status, reduce HIV levels in the community, and connect people with substance use treatment when needed. The study will also look at how well these services can be added into everyday clinic practice and what is needed to keep them going over time.

Gender: MALE

Ages: 18 Years - Any

Updated: 2026-02-17

1 state

HIV
Substance Use Disorder (SUD)
RECRUITING

NCT07028983

Fighting Addictions, Improving Lives: COmprehensive Drug Rehabilitation With Music

FALCO is a parallel pragmatic randomized control trial addressing long-term effects of music therapy (MT) on substance use disorder (SUD). 600 participants will be recruited from multiple European countries (see Locations). They will be randomized into one of the following intervention arms: Active Music Group (AMG), Music Listening Group (MLG) or Treatment as Usual (TAU) as offered locally.

Gender: All

Ages: 18 Years - Any

Updated: 2026-02-17

Substance Use Disorder (SUD)
NOT YET RECRUITING

NCT07397507

Mechanisms of Written Exposure Therapy in Residential SUD Treatment

The goal of this clinical trial is to learn how Written Exposure Therapy (WET), a brief treatment for PTSD, works among individuals with substance use disorders (SUD) engaged in residential SUD treatment and how biology may influence treatment. The main questions it aims to answer are: * Does WET improve PTSD and substance use outcomes among individuals with SUD+PTSD? * Does WET improve physiological responses and craving to trauma cues? * Do sex hormones influence changes physiological responses and craving during treatment among women? Participants will: * Complete WET or a neutral writing in addition to their residential SUD treatment * Complete two laboratory sessions before and after treatment * Complete follow-up surveys and interviews at 1- and 3-months post-treatment

Gender: All

Ages: 18 Years - 55 Years

Updated: 2026-02-09

PTSD - Post Traumatic Stress Disorder
Substance Use Disorder (SUD)
RECRUITING

NCT07104123

Substance Use in Pregnant People - Optimizing Retention in Treatment

Substance use during pregnancy is a leading cause of maternal morbidity and mortality in the United States, with 55-80% of postpartum patients disengaging from substance use disorder (SUD) treatment within one year of delivery. Structural and social determinants of health, including housing instability, transportation barriers, and limited childcare access, further exacerbate disparities in treatment retention. This pilot study, conducted in two specialized prenatal care clinics, evaluates the feasibility and acceptability of two integrated strategies to promote sustained engagement in recovery-oriented services during the perinatal and postpartum periods. Aim 1 implements a standardized social needs screening and referral protocol to connect patients with community-based supports. Aim 2 pilots a contingency management intervention to incentivize recovery-supportive behaviors. Findings will inform the design of a larger multi-site randomized controlled trial to evaluate the impact of these interventions on treatment retention, overdose prevention, and maternal-infant health outcomes.

Gender: FEMALE

Ages: 18 Years - Any

Updated: 2026-02-04

2 states

Substance Use Disorder (SUD)
Pregnancy
Postpartum
+1
RECRUITING

NCT07386574

Contextualization and Digitalization of WHO's Mental Health Action Gap Intervention Guide Substance Use Disorders Module

The aim of study is to: 1. To contextualize, adapt, customize and digitalize WHO's Mental Health Gap Action Programme Intervention Guide (e-mhGAP-IG); Substance Use Disorders Module (SUD module) V 2.0 for primary care settings (PCPs) in Pakistan. 2. To test the feasibility and acceotability of the e-mhGAP-IG (SUD module) training program in a feasibility cluster randomized controlled (cRCT) trial to enable mental health services in primary health care settings in Pakistan. The proposed study includes contextualization, adaptation, customization, and a feasibility cRCT of e-mhGAP-IG (SUD module) V 2.0 by constituting a combination of traditional and technological approaches of eHealth (mHealth, blended learning, and telemedicine) enabling mental health services in primary care settings to be well informed and accessible. This intervention will empower 300 Primary Care Physicians (PCPs) based in Primary Care Units (PCUs) from urban settlements and Basic Health Units (BHUs) from rural settlements in three major cities, Karachi, Lahore, and Rawalpindi, Pakistan.

Gender: All

Ages: 18 Years - Any

Updated: 2026-02-04

Substance Use Disorder (SUD)
RECRUITING

NCT07364240

Effect of Person-Centered Occupational Therapy Interventions for Substance Use Disorder

This study investigates the impact of person-centered occupational therapy interventions on individuals diagnosed with substance use disorder. Substance use often leads to isolation and difficulties in daily activities such as work, self-care, and leisure time. The research aims to evaluate how a tailored 8-week therapy program affects participants' occupational performance, self-efficacy, and psychological resilience. Participants will be divided into a study group receiving therapy and a control group.

Gender: All

Ages: 18 Years - 65 Years

Updated: 2026-01-28

Substance Use Disorder (SUD)