Clinical trials
Opioid clinical trials
Below are recruiting opioid clinical trials, each written for real people, not researchers. We’re tracking 430 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05058287RecruitingPhase 3
Steroid shot during low-back surgery
This trial tests whether using a steroid medicine (a steroid shot) around the time of low-back decompression surgery improves pain and recovery. It is for adults having a limited-area laminectomy, and it compares steroid use versus not using it.
New York, New YorkAges 18–85 - NCT04939623RecruitingPhase 2
Probenecid to ease opioid withdrawal symptoms while tapering
This Phase 2 study tests whether probenecid can lessen discomfort from opioid withdrawal in adults who are gradually lowering their opioid pain medicine. If it works, it may make tapering feel more tolerable and safer.
Calgary, AlbertaAges 18–80 - NCT04912531Recruiting
Virtual reality and smell tools to ease surgery pain
This trial tests whether a combination of virtual reality and guided smells can reduce pain and anxiety around major heart and chest surgeries. If you’re scheduled for one of the listed operations, the study may help make recovery feel more comfortable by using sensory-based distraction.
Boston, MassachusettsAges 18 years+ - NCT04893525RecruitingPhase 2/Phase 3
Buprenorphine-naloxone microdosing versus standard dosing after ED discharge
This study compares a smaller “microdose” starting method versus the usual starting dose of buprenorphine/naloxone for people with opioid use disorder when they are discharged from the emergency department. It may help find a safer, easier way to start treatment right after an ED visit and avoid problems caused by starting too early.
Calgary, AlbertaAges 18 years+ - NCT03756961Recruiting
Opioid-free care plan for people having weight-loss surgery
This trial studies whether an opioid-free or opioid-sparing care pathway can improve comfort and outcomes for adults undergoing laparoscopic weight-loss surgery. It may help people avoid side effects from opioid pain medicines while still managing pain safely.
Lindesberg, Region ÖrebroAges 18 years+ - NCT04676802RecruitingPhase 2
Pain relief after thumb joint surgery: ibuprofen and acetaminophen versus oxycodone
This study compares two ways to manage pain after thumb joint removal surgery: one using over-the-counter pain relievers (ibuprofen and acetaminophen) and the other using a prescription opioid (oxycodone). The goal is to see if the non-opioid option works just as well with fewer side effects.
Redwood City, CaliforniaAges 45 years+ - NCT04659317RecruitingPhase 3
Opioid-free pain plan for joint and arm surgeries
This Phase 3 study tests an opioid-free approach to pain control for certain orthopedic (bone/joint) surgeries. The goal is to help people manage surgical pain without using opioid pain medicines.
Atlanta, GeorgiaAges 18 years+ - NCT04218409RecruitingEarly Phase 1
Tests a spray to reduce opioid use and pain
This early trial studies whether Syntocinon can lower pain and help reduce how much opioids people use. It checks safety and the best dose by giving participants the study drug under close medical monitoring.
Gainesville, FloridaAges 21–45 - NCT04379115Recruiting
Brain stimulation study for people with opioid addiction
This study tests a non-invasive brain stimulation approach to reduce opioid cravings in people who are actively using non-prescribed opioids while on stable methadone. It may help people feel less craving and improve recovery support.
Hinsdale, IllinoisAges 18–85 - NCT04356274Enrolling by invitation
Improving access to addiction and mental health care at VA clinics
This study tests an approach to help VA clinics reach more Veterans with proven treatments for addiction and mental health conditions. It focuses on clinic-level processes (not individual medications) to increase how widely evidence-based care is delivered.
Palo Alto, CaliforniaAges 18 years+ - NCT04161066RecruitingPhase 1
Psilocybin plus buprenorphine to help opioid use disorder symptoms
This Phase 1 study tests how adding psilocybin to a standard opioid treatment (buprenorphine-naloxone) affects recovery and symptoms in people with moderate-to-severe opioid use disorder. It may help researchers understand whether this combination is safe and beneficial alongside medication for opioid withdrawal and cravings.
Madison, WisconsinAges 21–65 - NCT04166071Enrolling by invitationEarly Phase 1
Testing whether opioids plus support change learning behavior
This early study tests how opioid medicine, along with social support, affects how people learn or “unlearn” certain responses. If you’re healthy and meet safety requirements, it may help researchers understand how support could change the effects of pain-related medicines on behavior.
Los Angeles, CaliforniaAges 18–35 - NCT04025359RecruitingEarly Phase 1
Test dronabinol for pain responses in people on opioid treatment
This early-stage study tests whether dronabinol (a form of THC) changes pain perception in people with opioid use disorder who are already stable on methadone or buprenorphine. It may help researchers understand whether this treatment affects pain and drug-related outcomes in a safer, controlled way.
West Haven, ConnecticutAges 18–70 - NCT03823534RecruitingPhase 3
Study pain control after preventive femur bone surgery
This Phase 3 study tests a pain medicine plan used after preventive surgery to place a metal rod inside the thigh bone (femur) before a fracture happens. The goal is to find an approach that controls post-surgery pain while being safe for the right patients.
St Louis, MissouriAges 18 years+ - NCT03867539RecruitingPhase 4
Numbing shot and education to reduce opioids after carpal tunnel surgery
This study tests whether giving a long-lasting numbing injection (Exparel) plus education about pain management can help people avoid taking opioid pain pills after carpal tunnel release surgery. It may help reduce opioid use while still supporting comfort during recovery.
Dayton, OhioAges 18 years+ - NCT03685045Recruiting
Hepatitis C treatment support for people using opioid substitutes
This trial is studying hepatitis C treatment approaches for adults who have a history of injecting drugs, especially those who have injected recently or are on opioid substitution therapy. If you fit the background criteria, the study may offer a treatment pathway and extra support to help you get hepatitis C treated.
Canberra, Australian Capital TerritoryAges 18 years+ - NCT01730781Recruiting
PET scan study to image cannabinoid receptors in the brain
This study uses a special brain scan (PET) to measure cannabinoid receptors—areas in the brain that interact with cannabis-like chemicals. It may help researchers better understand how these receptors relate to conditions such as schizophrenia, PTSD, opioid use disorder, or early psychosis risk.
New Haven, ConnecticutAges 18–55 - NCT07778394Recruiting
Smartphone app to support recovery from opioid use disorder
This study is testing a smartphone app to help people who are starting or restarting medication for opioid use disorder. If you join, you'll use the app to support your recovery journey.
Providence, Rhode IslandAges 22 years+ - NCT07768007Recruiting
Methadone and memory study for opioid use disorder
This study tests whether a new approach can improve memory and mood in people taking methadone for opioid use disorder. It involves brain scans and may help with feelings of sadness or loss of interest.
New Haven, ConnecticutAges 18–50 - NCT07840183RecruitingPhase 4
Epidural versus other pain relief for open ventral hernia repair
This study compares two ways to manage pain after hernia repair surgery: using an epidural (a small tube in your back that delivers pain medicine) versus other pain medications that aim to reduce opioid use. The goal is to see which method provides better pain relief and helps you recover more comfortably.
Chicago, IllinoisAges 18–80 - NCT07793383Recruiting
Testing ways to support opioid treatment decisions in the ER
This study is testing different ways to help people with opioid use disorder decide if they want to start medication treatment while they're in the emergency department. It's looking at how to improve the support and guidance given in that setting.
Guilford, ConnecticutAges 18 years+ - NCT07846722Recruiting
Comparing two medicines to reduce pain medicine use after laparoscopic hysterectomy
This study compares two drugs, esmolol and dexmedetomidine, to see which one better reduces the need for strong painkillers after laparoscopic hysterectomy. It may help you manage pain with fewer opioids.
AthensAges 20–70
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Common questions
- Are there clinical trials for opioid?
- Yes. Clin2 currently lists 430 recruiting opioid studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a opioid trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a opioid trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.