Condition
Opioid Use clinical trials and research
As of November 12, 2026, Find a Trial lists 59 Opioid Use clinical trials that are recruiting, at sites in 18 countries (most in United States (38), Canada (4), Turkey (Türkiye) (4)). By phase: Phase 4 (8), Phase 2 (6), Phase 3 (5), Phase 1/2 (1). The most active sponsors are McMaster University (2), St. Louis University (2), Kocaeli City Hospital (2). There are also 534 NIH-funded research projects on Opioid Use, with $423.8 million in listed awards. Every study is explained in plain English. Data from ClinicalTrials.gov and NIH RePORTER, updated November 12, 2026.
- 59Clinical trials
- 534NIH research projects
- 18Countries
Newest Opioid Use clinical trials
All recruiting trials (59)
-
Serratus vs Erector Spinae Block for Pain After Unilateral Breast Surgery
This trial tests whether serratus posterior superior intercostal plane block or erector spinae plane block reduces chronic pain 3 months after unilateral breast surgery in adult women.
-
Using mHealth to Help Black Adults in the Midwest With Opioid/Stimulant Use and Mood Symptoms
This study tests a mobile health program to support recovery and mood in Black adults who use opioids or stimulants and are seeking treatment.
-
Targeting alcohol-opioid co-use among young adults with a new mobile health tool
A mobile health app is being tested to help young adults reduce drinking and opioid use when they occur together.
-
Dexa vs Dexmedetomidine with Bupivacaine in TAP Block for Laparotomy Analgesia
This study tests whether adding dexamethasone or dexmedetomidine to bupivacaine in a TAP block improves postoperative pain control after laparotomy.
-
Stress response with desflurane versus opioid-free TIVA during weight-loss surgery
This study will test whether adding the inhaled anesthetic desflurane to opioid-free anesthesia changes the body's perioperative stress response in people having bariatric (weight-loss) surgery.
-
Erector Spinae Block vs Paravertebral Block for Chronic Pain After Mastectomy
This trial tests whether an erector spinae block can better prevent chronic pain after mastectomy than a paravertebral block in adults 18–80.
-
Serratus block vs ESP block for pain after unilateral breast surgery
This trial tests whether the serratus posterior superior intercostal plane block (SPSIPB) provides similar or better pain relief than the erector spinae plane block (ESPB) after unilateral breast surgery in adult women.
-
Mindfulness for fracture recovery and reduced opioid use before and after surgery
This trial tests whether a brief, guided mindfulness exercise before and after fracture surgery can reduce anxiety and pain and help cut opioid use for adults with fractures.
-
Brief alcohol-focused program tailored for people taking buprenorphine
This project will try a short, opioid-informed alcohol counseling program for adults on prescribed buprenorphine who drink alcohol to see if it reduces drinking and helps them stay in treatment.
-
Lidocaine with or without steroid infusion into the middle meningeal artery for headaches after aneurysmal subarachnoid hemorrhage
This study will try an infusion of lidocaine, with or without a steroid, into the middle meningeal artery to see if it reduces severe headaches and opioid use in adults recovering from aneurysmal subarachnoid hemorrhage.
-
Kratom and other substances safety in people with past opioid use
This study tests kratom at different doses against a placebo and oxycodone to see how people with a history of opioid use tolerate and respond to them.
-
Autonomic Nerve Blockade to Reduce Pain and Nausea After Bariatric Surgery
This study tests whether an autonomic nerve block given during bariatric surgery can lessen pain and nausea and decrease the need for anti-nausea and pain medicines in the first 72 hours after sleeve gastrectomy or gastric bypass.
-
Pharmacist-led opioid stewardship for adults with chronic non-cancer pain
This program will test whether a pharmacist-led opioid stewardship program helps adults with chronic non-cancer pain reduce high-risk opioid prescriptions and improve their knowledge and attitudes about opioid use.
-
MGRNOX-guided general anesthesia to reduce opioid use during laparoscopic gallbladder surgery
This trial will see if using the EEG-based MGRNOX index to guide anesthesia can reduce opioid use during laparoscopic cholecystectomy in adults.
-
Lemborexant for insomnia in adults with opioid use disorder on buprenorphine
This trial will see if taking lemborexant each night for 8 weeks improves sleep, mood, and impulsive behavior in adults with moderate opioid use disorder who are stable on buprenorphine.
-
Improving opioid treatment and HIV prevention in prisons
This study is trying to find out what makes it hard to provide opioid treatment in prisons in Tajikistan, Kyrgyzstan, Moldova, and Georgia, so that they can improve care for people with addiction and help prevent HIV.
-
Comparing pain relief methods after knee surgery
This study is testing which pain relief method, Adductor Canal Block or Genicular Nerve Block, works better for people aged 18-72 after knee surgery.
-
Using the Nociception Level Index to guide opioid dosing during combined regional and general anesthesia
This trial tests whether using a Nociception Level Index (NOL) monitor to guide opioid dosing during combined general and regional anesthesia can reduce opioid use and side effects for adults having elective trauma or orthopedic surgery.
-
Ketamine during orthopedic trauma surgery to reduce pain, opioid use, and improve mood
This study will try a single dose of ketamine during surgery to see if it lowers pain and opioid needs and improves depression and PTSD symptoms in adults having major orthopedic trauma surgery.
-
Comparing ketamine delivery methods for postoperative pain management in orthopedic surgery
This study is testing whether giving ketamine through an IV or a patient-controlled pump works better for managing pain after major orthopedic surgery in adults.
-
Support for people recovering from opioid overdoses in Seattle
This study tests a new support center for people recovering from opioid overdoses in Seattle to see if it helps them get better care and stay safe compared to those who don’t use the center.
-
Blocking nerves during gallbladder surgery to reduce pain and nausea
This study is testing if using a combination of a long-lasting pain medicine and a steroid during gallbladder surgery can help reduce pain and nausea for patients after the operation.
-
Examining brain activity patterns related to opioid relapse during treatment
This study is testing how brain activity patterns might predict the risk of relapse to opioid use in people who have just started treatment with methadone or buprenorphine.
-
Comparing pain relief methods after lumbar fusion surgery
This study tests whether a new way of giving local anesthesia during lumbar fusion surgery can help patients feel less pain and use fewer opioids compared to the traditional method.
-
Comparing two pain management techniques for thoracotomy surgery
This study is testing two different pain management techniques for patients having thoracotomy surgery to see which one helps reduce the need for opioids.
-
Understanding how psychological factors affect pain management in surgery
This study looks at how feelings and worries about pain affect how well regional anesthesia works for people having surgery.
-
Evaluating pain management after laparoscopic tubal sterilization
This study is testing whether a combination of non-opioid pain medications can manage pain just as well as opioids after a laparoscopic tubal sterilization procedure.
-
Comparing two pain management techniques for children undergoing palate surgery
This study is testing two different pain management techniques for kids aged 6-18 who are having palate surgery to see which one helps them feel less pain after the operation.
-
Smart opioid dispenser and app for patients having a one-level lumbar discectomy or laminectomy
This test tries a locked opioid-dispensing device plus a smartphone app to help adults having a one-level lumbar discectomy or laminectomy who are opioid-naive or occasional users take oxycodone more safely after discharge.
-
Improving sleep and reducing opioid use in people with chronic pain
This study is testing if a sleep therapy can help people with chronic pain sleep better and use fewer opioids.
-
Optimal timing for TAP blocks in bariatric surgery
This study is testing whether giving a pain relief shot earlier during bariatric surgery helps obese patients recover faster and use less pain medication.
-
Nonopioid pain management after surgery for traumatic fractures
This study tests whether a nonopioid pain management plan can help adults recovering from surgery for traumatic fractures feel better and have fewer side effects than using opioids.
-
Syringe-service telemedicine plus social-network HIV prevention program
This program will test whether training people who inject drugs to recruit and educate their peers through syringe service telemedicine and social networks increases HIV testing and use of prevention and treatment services in Maryland.
-
Non-invasive pain management after lumbar fusion surgery
This study is testing if a new non-opioid pain relief method called transcutaneous auricular neurostimulation can help people feel less pain after lumbar fusion surgery.
-
Translating and validating a questionnaire for opioid misuse in Swedish pain patients
This study is testing a new Swedish questionnaire to see if it can help identify opioid misuse among pain patients who are using opioids for treatment.
-
Using motivational interviewing and mindfulness to help reduce substance use
This study is testing whether combining motivational interviewing and mindfulness techniques can help people who struggle with using multiple substances, like opioids and tobacco, to reduce their use.
-
Mindfulness training for patients on methadone treatment
This study is testing if adding mindfulness training to methadone treatment can help people with opioid use disorder manage their pain and reduce their opioid use.
-
Examining the link between sex hormones, pain after surgery, and opioid use
This study is trying to see if levels of sex hormones like testosterone affect pain and opioid use in young girls aged 11-16 after they have orthopedic surgery.
-
Preoperative Maxigesic to reduce remifentanil needs during surgery
We'll see if giving Maxigesic (intravenous ibuprofen plus acetaminophen) before general anesthesia reduces how much remifentanil adults aged 19–60 need during surgery.
-
Using pregabalin and lofexidine to help treat opioid withdrawal in outpatients
This study is testing if a combination of two medications, pregabalin and lofexidine, can help adults with opioid use disorder feel better during withdrawal and make it easier for them to start a new treatment.
-
Comparing brain activity in women with chronic pain and opioid use to healthy women
This study looks at how brain activity differs between women with chronic pain and opioid use and healthy women to help find better treatments for pain.
-
Documenting opioid use and pain management after surgery
This study looks at how opioids are used for pain management after surgery in adults to see how it affects their recovery and quality of life over time.
-
Non-invasive treatment for opioid withdrawal using vagal nerve stimulation
This study is testing whether a non-invasive treatment using Vagal Nerve Stimulation can help people with opioid use disorders feel better during withdrawal and reduce cravings.
-
Exploring how meditation affects pain relief in patients with chronic low back pain on opioids
This study tests whether mindfulness meditation can help people with chronic low back pain who are taking opioids feel less pain.
-
Investigating treatments for sleep apnea in veterans using opioids
This study is testing whether certain treatments can help veterans with sleep apnea who use opioids breathe better and improve their quality of life.
-
Device for dispensing opioids after cancer surgery
This study tests a new device that gives cancer patients their pain medication after surgery to see if it's easier and safer to use than regular pill bottles.
-
Personalized pain management for cesarean sections
This study is testing a new way to manage pain for breastfeeding mothers after cesarean sections to see if it can reduce side effects from opioids and improve recovery for both moms and their babies.
-
ESP nerve block versus wound infiltration for pain after laminectomy
This trial will try whether an erector spinae plane (ESP) block or wound infiltration gives better pain relief and reduces opioid use for adults having a one- or two-level laminectomy.
-
Using steroids during lumbar surgery to reduce pain and opioid use
This study tests if using steroids during back surgery can help reduce pain and the need for opioids in patients recovering from the procedure.
-
Using virtual reality and scents to reduce pain and anxiety after heart surgery
This study is testing whether using virtual reality and scents can help reduce pain and anxiety for people recovering from heart surgery.
-
Opioid-free anesthesia for abdominal aortic aneurysm repair
This study is testing a new way to manage pain during and after surgery for abdominal aortic aneurysm repair without using opioids, to see if it helps patients recover better.
-
Community-based program for youth with opioid use disorder
This study is testing a community program that helps young people with opioid use disorder get better treatment and support to see if it keeps them engaged in recovery and reduces overdoses.
-
Testosterone treatment for pain relief in men with opioid-induced low testosterone
This study is testing if testosterone treatment can help men with chronic spinal pain and low testosterone from using opioids feel better and improve their quality of life.
-
Mindfulness practice for patients with endometrial and cervical cancer
This study is testing whether using a mindfulness app can help women with endometrial or cervical cancer feel less stressed and anxious before their surgery or treatment.
-
Investigating opioid prescriptions after hip arthroscopy
This study is testing if giving fewer pain pills after hip surgery can still help patients manage their pain while using less medication.
-
Standardized opioid prescriptions after hand and forearm surgery
This study tests if a set prescription for pain medication after hand and forearm surgery can help patients use fewer unused opioid pills while still managing their pain effectively.
-
Comparing opioids and non-opioids for pain management after knee surgery
This study is testing whether non-opioid pain medications can work as well as opioids for people recovering from knee surgery.
-
Using Toradol for Pain Control After Prophylactic Femoral Nailing
This study is testing whether adding Toradol to opioid pain relief can help patients recovering from surgery on their femur feel better while using fewer narcotics.
-
Program to reduce opioid use in chronic pain patients after surgery
This study is testing a new program to help chronic pain patients use less opioids after surgery by providing pain education and support tools.
NIH-funded research (newest 40 of 534)
Early-stage science funded by the US National Institutes of Health. Most of these projects don't enroll patients, but they show what is being worked on.
-
Systems analysis to improve opioid use disorder care after jail release (SAIA-MOUD)
A program to help people with opioid use disorder get better, faster, and safer care after they leave jail.
-
Precise epigenetic drugs for opioid addiction
A tiny, targeted drug approach is being developed to help people with opioid use disorder by rewriting the epigenetic signals in the brain to reduce cravings and relapse risk.
-
Increasing Access to Medications for Opioid Use Disorder for Unhoused Montanans
This project helps unhoused people in Montana get life-saving medicines for opioid use disorder through clinics connected to syringe service programs, a nurse-led MOUD model, and peer support.
-
Optimizing long-acting PrEP and opioid treatment for people in jails and prisons
This project tests a real-world approach to using long-acting PrEP and buprenorphine for HIV prevention and opioid treatment among incarcerated individuals and after release.
-
Scaling up medications for opioid use disorder in residential treatment programs
This grant studies how to help residential treatment programs provide medications for opioid use disorder to reduce overdoses after discharge, focusing on real-world settings and policies.
-
Increasing Capacity at a Native Community Clinic to Improve Opioid Care for urban AI/AN
This grant helps a Native American health clinic build its research capacity to better serve urban American Indian and Alaska Native people dealing with opioid use disorder and related health issues.
-
Multimodal fetal and placental imaging to predict outcomes in infants exposed to opioids
This project uses brain and placenta imaging plus biomarkers to understand how prenatal opioid exposure affects babies and how to predict and improve outcomes for infants born to mothers with opioid use disorder.
-
Safer ibogaine-based medicine for opioid use disorder
A new synthetic iboga alkaloid candidate, GM-3009, is being developed to treat opioid use disorder with fewer safety risks and better effectiveness.
-
Improving care for opioid use disorder in the ICU
This project helps hospital staff in intensive care units provide better care for patients with opioid use disorder.
-
Pain sensitivity, alcohol analgesia, and heavy drinking in people with opioid use disorder
A short, patient-friendly look at how pain sensitivity and alcohol’s pain-relieving effects might influence heavy drinking in people with opioid use disorder.
-
Health impacts of housing programs for people who are homeless and use opioids
This project follows people who are homeless and use opioids to see how different housing and treatment policies affect overdose and health outcomes.
-
Opioid Use Disorder County Prevalence Using Recapture Estimates (OUD CAPTURE)
Aimed at estimating how common opioid use disorder is across counties using advanced statistical methods to help target treatment and resources.
-
Effects of prescription opioid use during pregnancy on a mother's brain after birth
This project looks at how taking prescription opioids during pregnancy changes a mother's brain and behavior after her baby is born.
-
How a thalamus-to-reward-center brain circuit may drive opioid craving and relapse
This project looks at how specific brain connections between the thalamus and the brain's reward center may drive cravings and relapse during opioid withdrawal for people recovering from opioid use.
-
Tailored opioid tapering and pain support after spine surgery for patients using opioids long-term
A Stanford-backed plan helps people who already take opioids before spine surgery to taper safely after surgery and get non-opioid pain relief.
-
Team-based care for pregnant women with opioid use disorder in rural clinics
A team-based care model is being adapted for rural obstetric settings to help pregnant women with opioid use disorder start and continue medications and improve health outcomes for them and their babies.
-
Digital toolkit to improve IPV screening and care in opioid use disorder
A digital toolkit helps clinics screen for intimate partner violence and connect people with IPV-related care for those being treated for opioid use disorder.
-
Mobile health support for people with opioid use disorder and PTSD after residential treatment
A mobile health tool will help adults with opioid use disorder and PTSD stay connected to support after they leave residential treatment.
-
Postsurgical pain and opioid use in older adults with mild cognitive impairment
This grant studies how mild cognitive impairment in older adults affects pain after surgery and how opioids are used, with the goal of improving safer, better pain management.
-
Understanding withdrawal circuits in opioid use disorder and how to interrupt relapse
Researchers are studying specific brain circuits related to withdrawal in opioid use disorder to identify targets that could help prevent relapse.
-
Medications for opioid use disorder in older adults with multiple health issues
This project looks at how older adults living with opioid use disorder and multiple chronic conditions respond to medications for opioid use disorder.
-
Let-7 MicroRNA Link Between Adolescent Opioid Exposure and Future Opioid Use in Rats and Humans
This grant studies how opioid use during adolescence in males might change sperm and affect kids or future generations, using both rat models and human data.
-
Oral health effects of buprenorphine and methadone in people with opioid use disorder
This project will explore how common MOUD medicines like buprenorphine (including dissolvable forms) and methadone may affect oral health in people with opioid use disorder.
-
Psilocybin and opioid use disorder: a crossover trial to understand how psilocybin might help reduce relapse risk
A Johns Hopkins-led study will test whether a single high dose of psilocybin can change withdrawal and craving in adults with opioid use disorder, using a careful crossover design to compare two doses.
-
Antibody treatment that soaks up fentanyl to prevent overdoses
A new antibody medicine that soaks up fentanyl and similar opioids is being developed to protect people at high risk of overdose.
-
How Medicaid expansion could help recently released people get medications for opioid use disorder and mental health care
This grant studies how extending Medicaid after release from jail or prison could help people with opioid use disorder and mental health needs stay on treatment and avoid overdose.
-
High-Dose Medications for Opioid Use Disorder and Retention in Care
This project tests whether adjusted, higher-dose MOUD regimens can help people stay in treatment and reduce overdose risks during the fentanyl crisis.
-
RNA location and local protein-making in brain circuits tied to opioid use disorder
A study exploring how RNA localization and local protein production in brain cells contribute to lasting brain changes and relapse risk in people with opioid use disorder.
-
Bright light therapy to improve sleep and recovery in opioid use disorder
This project tests whether morning bright light therapy can improve sleep, circadian rhythms, brain signaling, and treatment outcomes for people with opioid use disorder.
-
SHE-OUD: a quick, private screen-and-help program for women in opioid treatment
A brief, computer-based screening and intervention is tested to help women with opioid use disorder who have experienced sexual violence and PTSD, aiming to improve their treatment outcomes.
-
Using new linked databases to cut postoperative opioid use after inpatient surgery
A study using linked patient data from hospital records to understand and reduce long-term opioid use after surgery, especially in older adults.
-
Improving Access to Medications for Opioid Use Disorder in Medicare Beneficiaries
This project aims to make FDA-approved medications for opioid use disorder more accessible to people covered by Medicare.
-
Improving back-pain care in rural areas with tele-physical therapy
This project tests a tele-rehabilitation program to help adults with chronic low back pain in rural communities access physical therapy and reduce opioid use.
-
Housing and opioid treatment strategies to improve health for people experiencing homelessness and opioid use disorder
A Stanford-led project will model how housing and opioid treatment interventions could reduce HIV, HCV, and related diseases among people who are unhoused and struggle with opioid use disorder.
-
Cannabinoid CB2 receptor activators for opioid use disorder
A new treatment approach uses a CB2 receptor activator to reduce cravings and drug reward in people with opioid use disorder.
-
Medicaid coverage of reentry health supports for opioid use disorder after prison release
A mentored research grant explores how Medicaid-backed post-incarceration health navigation and social-linkage services affect care and outcomes for people with opioid use disorder after they leave prison.
-
Transforming how we measure opioid use disorder and expand life-saving care
This project will combine health data from several countries to better estimate how many people have opioid use disorder and how well treatment and prevention efforts are working.
-
HEALing Measurement Center: Improving opioid use disorder care with better measurement in Pennsylvania
A Pennsylvania effort to improve opioid use disorder treatment by using measurement-based care to keep people in recovery and reduce overdose deaths.
-
Optimizing opioid treatment for people leaving prison
This project tests simple screening and a small diagnostic checklist to help identify opioid use disorder in prisoners and link them to medication for opioid use disorder (MOUD) when they’re released.
-
Sleep problems and opioid use after adolescent surgery
This project looks at how sleep problems after surgery may influence whether teens start using prescribed opioids in risky ways.
Related topics
Quick answers
How many Opioid Use clinical trials are recruiting right now?
59, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.
Where are these trials running?
In 18 countries. The most sites are in United States (38 trials), Canada (4 trials), Turkey (Türkiye) (4 trials), Colombia (2 trials), South Korea (2 trials). Each study page lists its sites and which ones are recruiting.
What phases are they in?
Phase 4: 8, Phase 2: 6, Phase 3: 5, Phase 1/2: 1. Trials with no phase listed are usually device, behavioural or observational studies.
How do I join one?
Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.
Find the studies that fit you
A list is a starting point. Tell us your situation in your own words and we'll rank the studies that match and explain why. It's free and needs no account.