Clinical trials
Placebo Effect clinical trials
Below are recruiting placebo effect clinical trials, each written for real people, not researchers. We’re tracking 725 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06213324RecruitingPhase 4
Ketamine's effects on brain circuits in depression
This trial studies how ketamine affects brain circuits in people with depression compared to healthy volunteers. It involves a single infusion of ketamine and brain scans before and after.
New York, New YorkAges 18–65 - NCT06500104Enrolling by invitation
Kefir for Childhood Obesity: A Trial
This trial tests whether a probiotic drink called kefir (a fermented milk beverage) can help children and teens with obesity lose weight or improve their health. It's for children who are significantly above a healthy weight and don't have other serious medical conditions or dairy allergies.
TaichungAges 7–17 - NCT06230861Recruiting
Quercetin supplement for heart and metabolic health
This study tests whether taking a supplement called quercetin (a natural plant compound) improves heart and metabolic health markers in healthy adults. You'd take the supplement for a period of time, and researchers will measure things like blood sugar and cholesterol.
Preston, LancashireAges 18–65 - NCT03228732RecruitingEarly Phase 1
Fluoxetine and/or DHEA in people with type 1 diabetes
This early-stage study tests whether the medicines fluoxetine and/or DHEA can improve health in adults with type 1 diabetes. It’s mainly looking for people without major diabetes complications or major medical problems to safely study the effects.
Baltimore, MarylandAges 18–50 - 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 - 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 - NCT07035964Recruiting
Lactoferrin supplement for gut health in adults
This trial tests whether a daily supplement called Effera Human Lactoferrin can improve gut health in adults with belly fat and mild stomach issues. It compares the supplement to a placebo (a dummy pill) over several weeks.
Addison, IllinoisAges 18–40 - NCT07377994Enrolling by invitation
Gut health and immunity study with a probiotic in healthy adults
This trial tests a probiotic supplement containing Bacillus coagulans to see if it improves gut health and immune function in healthy adults. If you are generally healthy and not taking certain medications or supplements, you may be able to join.
Bangalore, KarnatakaAges 18–50 - NCT07377942Enrolling by invitation
Probiotic study for gut and immune health in healthy adults
This study tests a probiotic (a type of good bacteria) called Bacillus subtilis to see how it affects digestion and the immune system in healthy adults. It involves taking the product, giving stool samples, and visiting the clinic for checkups.
Bangalore, KarnatakaAges 18–50 - NCT06385054RecruitingPhase 2
Probiotics for infant colic in breastfed babies
This study tests a probiotic (friendly bacteria) to see if it can reduce crying and fussing in babies with colic. It is for exclusively breastfed infants 8 weeks and younger who have colic symptoms.
Bécon-les-GranitsAges Up to 2 months - NCT06938464Recruiting
Probiotics to prevent gestational diabetes in high-risk women
This study tests whether taking probiotics (friendly bacteria) during early pregnancy can help prevent gestational diabetes in women who are at higher risk for it.
Hangzhou, ZhejiangAges 18–50 - NCT07119788Recruiting
Haskap berry supplement for cognitive health
This study tests whether a supplement made from haskap berries can help improve cognitive health in older adults. If you are 50 or older, eat few fruits and vegetables, and are generally healthy, you may be able to join.
ReadingAges 50 years+ - NCT07089238Recruiting
Citicoline for mood in healthy adults
This study tests whether a supplement called citicoline can improve mood in healthy adults who have some mild mood disturbance. It is designed to see if taking citicoline leads to a better mood.
Canfield, OhioAges 21–65 - NCT02781519RecruitingPhase 1
Study how THC affects men and women who have used cannabis before
This Phase 1 study tests how delta-9 THC (the main active ingredient in cannabis) affects healthy adults, and whether the effects differ by gender. It may help researchers understand risks and responses to THC, which could guide safer use and future treatments.
West Haven, ConnecticutAges 18–55 - NCT04281979Recruiting
Testing a substance’s effects in adult cigarette and vape users
This study tests how a specific substance affects people who currently smoke cigarettes or e-cigarettes. You may be able to join if you’re within a certain age range and recently had specific smoking and drinking patterns, and if you meet health/safety requirements for study procedures like MRI.
Portland, OregonAges 21–40 - NCT06666673RecruitingEarly Phase 1
Effects of a muscle relaxant on arm movement after stroke
This study looks at how the brain controls arm movements after a stroke. It tests whether a medication called tizanidine, which relaxes muscles, can improve arm function when combined with physical therapy.
Chicago, IllinoisAges 18–80 - NCT05814055RecruitingPhase 2
Kava to help quit smoking by easing stress and sleep issues
This Phase 2 study tests whether kava can help people quit smoking, especially by reducing stress and improving sleep during tobacco abstinence. You may be offered kava as part of a quitting support plan and monitored for safety and progress.
Gainesville, FloridaAges 21–75 - NCT05649059RecruitingPhase 4
Cannabidiol study for social anxiety symptoms
This trial studies whether cannabidiol (CBD) helps improve social anxiety symptoms. You may be able to join if you are an adult with significant social anxiety and meet medication and health safety requirements.
Cambridge, MassachusettsAges 18–55 - NCT07425938Recruiting
How oxytocin affects emotional processing
This study looks at how oxytocin, a natural hormone, influences the way we process emotions. Healthy volunteers will receive oxytocin to understand its effects on emotion and brain activity.
Chengdu, SichuanAges 18–30 - NCT07800364Recruiting
Tizanidine before leg surgery for better pain and sleep
This study tests whether taking a muscle relaxant called tizanidine before leg surgery improves pain control and sleep quality after the operation. It may help you recover more comfortably.
Tanta, Gharbia GovernorateAges 21 years+ - NCT06686914RecruitingPhase 1
How CBD affects driving by dose and sex
This study tests how different doses of CBD (a cannabis compound) affect driving ability in healthy adults. It looks at whether men and women react differently, and helps understand if CBD is safe to use before driving.
Morgantown, West VirginiaAges 18–30 - NCT07073950RecruitingPhase 4
A study on a triple inhaler for COPD with hyperinflation
This study tests a triple-combination inhaler (budesonide, glycopyrronium, formoterol) against a placebo inhaler to see how it affects your heart and lungs if you have COPD and over-inflated lungs.
AhrensburgAges 40–80 - NCT07678463RecruitingPhase 1
Testing a new medicine in healthy volunteers
This study tests a new experimental medication (QX-4533) in healthy volunteers to find the best dose and see how it works in the body. It involves taking the medication and having your health monitored closely over time.
Brisbane, QueenslandAges 18–55 - NCT06424756RecruitingPhase 2
Antioxidant supplement for blood vessel health
This study tests whether an antioxidant supplement can improve blood vessel health in healthy adults. It compares the supplement's effects in non-Hispanic Black and non-Hispanic White participants to see if there are differences in how blood vessels respond.
Athens, GeorgiaAges 18–75
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Common questions
- Are there clinical trials for placebo effect?
- Yes. Clin2 currently lists 725 recruiting placebo effect 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 placebo effect 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 placebo effect 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.