Treatment
Opioid clinical trials
We’re tracking 441 recruiting studies that include Opioid, each written for real people, not researchers, below.
Recruiting studies
- NCT05336188Enrolling by invitation
Smartphone help to prevent relapse in opioid use disorder
This study looks at whether a smartphone-based program can help people avoid relapse from opioid use disorder. Some participants may also do brain scans to better understand the brain changes behind relapse prevention.
Little Rock, ArkansasAges 18 years+ - NCT03396276Enrolling by invitationPhase 4
Emergency system to help people stop opioid misuse
This Phase 4 study tests an “emergency opioid engagement system” that aims to help people who are opioid-dependent start stopping opioid use. If you’re willing to stop and can safely participate, the program may offer structured support when you’re in the emergency setting.
Houston, TexasAges 18 years+ - NCT06655883RecruitingPhase 3
Testing suvorexant for insomnia in people with opioid use disorder
This study tests whether the sleep medication suvorexant (Belsomra) can help people with opioid use disorder who also have trouble sleeping. If you are stable on medication for opioid use disorder and have not used opioids in the last month, this trial may be an option for you.
Garden Grove, CaliforniaAges 18–70 - NCT06995885Enrolling by invitation
A study to improve tracking of opioid use in the fentanyl era
This study aims to develop a better tool for recalling and tracking opioid use patterns, especially with fentanyl. It may help people who use opioids outside of medical settings to more accurately report their use.
Baltimore, MarylandAges 18–99 - NCT07214389Recruiting
Measuring outcomes for opioid treatment program quality
This trial is testing ways to improve quality at opioid treatment programs (OTPs). It may help if you receive care at a BayMark OTP.
Research Triangle Park, North CarolinaAges 18 years+ - NCT05675735Recruiting
Methadone take-home program to help people stay in treatment
This trial studies whether changing how methadone is allowed to be taken home can improve how long people stay in opioid use disorder treatment. It focuses on clinics and on adults who have already been receiving take-home methadone.
Storrs, ConnecticutAges 18 years+ - NCT06423716RecruitingPhase 4
Duloxetine to reduce opioid use after knee replacement
This study tests whether taking the pain medication duloxetine before and after knee replacement surgery can reduce the need for opioid painkillers. It may help patients manage pain with fewer side effects from strong narcotics.
Toronto, OntarioAges 50 years+ - NCT06015711Recruiting
Does a pre-surgery painkiller reduce strong IV pain meds needed?
This trial tests if taking Maxigesic® (a combination of two pain relievers) before surgery can lower the amount of a strong IV pain medicine called remifentanil needed during anesthesia. It may help patients have a smoother recovery with fewer side effects.
Suwon, Gyeonggi-doAges 19–60 - 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 - NCT07457489Recruiting
Brain stimulation for opioid recovery
This study tests a non-invasive brain stimulation technique called TMS to see if it can reduce opioid cravings and help people who are already taking buprenorphine stay in recovery. TMS uses magnetic pulses to stimulate parts of the brain involved in addiction.
Brentwood, TennesseeAges 18–65 - NCT07674836Recruiting
Comparing two nerve blocks for chronic pain after breast surgery
This study tests two types of nerve blocks (SPSIP and ESP blocks) to see which one works better for long-term pain after a single-sided breast surgery like mastectomy. It aims to find a safer, more effective way to manage chronic pain after surgery.
İzmit, KocaeliAges 18–65 - NCT07541040Recruiting
Nerve Blocks for Breast Surgery Pain Relief
This trial tests two different nerve-block techniques to reduce pain after breast surgery. The study compares a serratus block with an ESP block—both are injections of numbing medication near nerves—to see which works better for managing pain without heavy opioid use.
İzmit, KocaeliAges 18–65 - NCT06878014RecruitingPhase 4
Morphine for pain relief after hip replacement surgery
This trial tests different doses of morphine given during spinal anesthesia to find the safest and most effective way to control pain after hip replacement surgery. If you are having a total hip replacement, you may be able to join.
Sosnowiec, Silesian VoivodeshipAges 18–75 - NCT06323837RecruitingPhase 2
Testing mirtazapine for methamphetamine use in people on opioid treatment
This trial tests whether the antidepressant mirtazapine can help reduce methamphetamine use in people who are already receiving medication for opioid use disorder. It aims to see if adding this medication improves outcomes for those struggling with both conditions.
Spokane, WashingtonAges 18 years+ - NCT05991687Recruiting
Safe disposal of leftover pain pills after surgery
This trial helps people who are new to opioids learn how to safely dispose of leftover pain medication after outpatient surgery, reducing the risk of misuse.
Ann Arbor, MichiganAges 18 years+ - NCT06039566RecruitingPhase 3
NAC vs placebo for pain after hysterectomy
This trial tests if a medicine called N-acetylcysteine (NAC) can reduce the need for strong pain pills after hysterectomy surgery. If you are having a laparoscopic or robotic hysterectomy, this study may help you recover with less opioid pain medicine.
Charleston, South CarolinaAges 18 years+ - NCT05380531Recruiting
Personalized pain plan for planned C-section using opioid options
This trial tests a personalized approach to pain control during and after a scheduled C-section. It may help by matching pain medicine choices to each person’s needs, including the use of in-hospital opioids for relief.
Indianapolis, IndianaAges 18 years+ - NCT05007561RecruitingEarly Phase 1
Study of how opioids change feelings and brain responses to social events
This early-stage study looks at how opioids affect your experience of social situations and your brain activity. It may help researchers understand how opioid medicines influence social perception and brain signaling.
San Diego, CaliforniaAges 18–25 - NCT06409689Recruiting
Oliceridine for pain relief after upper abdominal surgery
This study tests a new pain medicine called oliceridine after laparoscopic upper abdominal surgery. It aims to improve pain control and recovery compared to standard opioids.
Wuhan, HubeiAges 18–70 - NCT06288282Recruiting
Predicting pain and opioid misuse in chronic back pain
This study looks at how thinking and behavior affect long-term pain and opioid use in people with chronic lower back pain. It aims to find better ways to manage pain and prevent medication misuse.
New York, New YorkAges 18 years+ - NCT07208305RecruitingPhase 3
Testing a drug combo for opioid-related nausea
This study tests whether the combination of olanzapine and metoclopramide can prevent nausea and vomiting caused by strong painkillers (opioids) in people with advanced cancer. If you are starting a strong opioid for pain and have not had nausea or vomiting recently, this study may be for you.
Xining, QinghaiAges 18 years+ - NCT05769348Recruiting
PET brain study to test opioid signaling in migraine
This study uses brain scans (PET) to look at how the body’s “opioid” pain system works in people with migraine. It may help researchers understand migraine biology and test approaches that could improve migraine treatment.
Ann Arbor, MichiganAges 18–65 - NCT07687966RecruitingPhase 2
Study of CBP-0276 for pain after major orthopedic surgery
This trial tests if a new medicine, CBP-0276, can help reduce the amount of opioids needed for pain after major bone surgery. It may help manage pain with fewer side effects.
Mexico CityAges 40–75 - NCT06696430Recruiting
Nudging to use TENS for pain after surgery
This trial tests whether a simple reminder (nudging) can encourage staff and patients to use a device called TENS, which uses mild electrical pulses to help reduce pain after urological surgery.
Gothenburg, VGRAges 18 years+
Common questions
- Are there clinical trials studying Opioid?
- Yes. Clin2 currently lists 441 recruiting studies that include Opioid, drawn from the U.S. registry and rewritten for real people so you can see what each is testing and who it's for.
- How do I know if I qualify for a Opioid trial?
- Each study lists its own eligibility criteria — rules about condition, age, and prior treatments. On every Clin2 trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Is Opioid an approved treatment?
- A drug being studied in a trial may be investigational (still being tested) or already approved and being studied for a new use. Each study page explains what phase it's in. Clin2 does not provide medical advice — talk with your doctor about whether Opioid or a specific trial is right for you.
Related treatments
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. A drug appearing here is being studied in a trial and may be investigational. Talk with your doctor about whether a specific treatment or trial is right for you.