Clinical trials
Placebo - Control clinical trials
Below are recruiting placebo - control clinical trials, each written for real people, not researchers. We’re tracking 3,905 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07221370RecruitingPhase 2/Phase 3
Vancomycin to prevent C. diff infection in ICU patients
This trial tests whether giving vancomycin through a tube into the stomach can prevent a serious gut infection called C. diff in people who are very sick in the ICU and taking antibiotics. If you qualify, you might receive this medicine to lower your risk.
Moreno Valley, CaliforniaAges 18 years+ - NCT07220265Recruiting
PKU carriers: How high phenylalanine affects the brain
This study looks at how carrying one copy of the PKU gene might affect thinking and brain health in adults. It will help researchers understand if mild changes in a substance called phenylalanine can impact memory, focus, and brain scans.
Columbia, MissouriAges 18–60 - NCT07213167Recruiting
Low contrast vision test for different lens implants
This trial checks how well you see in low light and low contrast after having cataract surgery with specific lens implants. It helps doctors understand which lenses work best in dim conditions.
Bakersfield, CaliforniaAges 22 years+ - NCT07213323Recruiting
Probiotics for Digestion During Weight-Loss Treatment
This study tests whether taking a probiotic (a type of 'good' bacteria) can improve digestion and gut health in people who are starting a GLP-1 RA medicine for weight loss. You would take the probiotic daily and answer questions about your digestive symptoms.
Pierre-BéniteAges 18–75 - NCT07218445RecruitingPhase 4
Tirzepatide for hot flashes in post-menopausal women with obesity
This study tests whether tirzepatide, a weekly injection, can reduce bothersome hot flashes and slow biological aging in post-menopausal women with obesity. It also includes a personalized diet and exercise plan.
Jacksonville, FloridaAges 46–60 - NCT07213349RecruitingPhase 2
Daridorexant for Alzheimer's prevention
This study tests whether daridorexant, a medication that helps improve sleep, can prevent Alzheimer's disease. If you have mild memory concerns but not dementia, this trial may help find out if better sleep can protect your brain.
Montreal, QuebecAges 50–90 - NCT07221214RecruitingPhase 2
Testing a diabetes drug for drinking and heart health in HIV
This trial tests if a once-weekly diabetes medication (semaglutide) can help people with HIV reduce heavy drinking and improve heart health. It's for people who drink alcohol and have a higher body weight.
Nashville, TennesseeAges 18–89 - NCT07213063Recruiting
Creatine and HMB supplements for Down syndrome
This trial tests whether taking creatine and HMB supplements can improve muscle strength, reduce inflammation, and increase muscle mass in people with Down syndrome. It may help if you or your loved one can do basic physical tests like standing from a chair and do not have kidney disease or severe mobility issues.
Burgos, BurgosAges 18 years+ - NCT07220382RecruitingPhase 4
Botox injections before large hernia surgery
This trial tests if getting Botox shots in the belly muscles before hernia surgery makes the repair easier and more successful. It is for adults who need a planned, open surgery for a large ventral hernia.
Cleveland, OhioAges 18 years+ - NCT07217912RecruitingPhase 2
Study of daridorexant to prevent confusion after heart surgery
This trial tests whether a sleep medication called daridorexant can help prevent delirium (sudden confusion) in older adults after heart surgery. You must be 60 or older and having a specific type of heart operation.
Rochester, New YorkAges 60 years+ - NCT07212361Recruiting
Restoring infant gut bacteria with mother's microbes
This study tests whether giving healthy newborns a special mix of their own mother's friendly bacteria can help build a healthy gut. It is for mothers who had a healthy pregnancy, plan to breastfeed, and live near Helsinki.
HelsinkiAges Up to 50 years - NCT07216755Recruiting
Breathing training and nitrate for altitude exercise
This study tests whether breathing training and a natural nitrate supplement (from beets) can improve how well you exercise in conditions that simulate high altitude. You'll do cycling workouts while we measure your performance.
Daytona Beach, FloridaAges 18–40 - NCT07215884RecruitingPhase 1
Dopamine and movement in people who stutter
This study looks at how dopamine affects speech and movement in adults who stutter. It may help us understand why stuttering happens.
San Francisco, CaliforniaAges 18–65 - NCT07219498Recruiting
Probiotics for muscle soreness after exercise
This trial tests whether taking a probiotic supplement for 5 weeks can reduce muscle soreness after exercise. If you exercise regularly and are generally healthy, you may be able to join.
Minneapolis, MinnesotaAges 18–30 - NCT07217665Enrolling by invitationPhase 2
AADvac1 vaccine for progressive supranuclear palsy
This trial tests a vaccine called AADvac1 for people with progressive supranuclear palsy (PSP), a brain condition that affects movement and thinking. The study wants to see if the vaccine can slow the disease down.
San Francisco, CaliforniaAges 41–86 - NCT07217873RecruitingPhase 2/Phase 3
IV iron for teens with scoliosis and low iron
This trial tests whether giving intravenous (IV) iron before spine surgery helps teens with scoliosis who have low iron stores. The goal is to see if it can reduce the need for blood transfusions during surgery.
New York, New YorkAges 10–19 - NCT07218549RecruitingPhase 1
Study of psychoactive substances in people with past opioid use
This trial tests how safe certain psychoactive substances are and what effects they have in people who have used opioids in the past but are not currently dependent on them. It aims to gather information that could help future treatment options.
Houston, TexasAges 18–55 - NCT07212868RecruitingPhase 1
How glucagon affects blood sugar after weight loss surgery
This study looks at how the hormone glucagon affects blood sugar in people who have had gastric bypass or sleeve gastrectomy surgery more than a year ago, compared to people who have not had any gastrointestinal surgery. It aims to understand glucose metabolism better and may help improve care for people after bariatric surgery.
San Antonio, TexasAges 18–65 - NCT06077019Recruiting
How lung function affects exercise in fit adults
This study looks at how your lung function may limit your exercise capacity, even if you are very active. If you are a healthy, highly fit adult aged 18-39, you may be able to help researchers better understand this connection.
CopenhagenAges 18–39 - NCT06067100Recruiting
Effect of asthma medication on exercise in active adults
This trial tests how a common asthma medication (a long-acting beta-agonist combined with a corticosteroid) affects exercise performance in healthy, fit young adults. It may help you understand if you could join if you exercise regularly and have no asthma or heart issues.
CopenhagenAges 18–39 - NCT06654986Recruiting
Test of muscle building with a beta-2 agonist and added amino acids
This study tests how a medicine (beta-2 agonist) combined with extra amino acids (building blocks of protein) affects muscle growth. It looks at how your body builds new muscle in response to these two things together.
CopenhagenAges 18–40 - NCT06655012Recruiting
How salmeterol affects exercise performance
This trial tests whether salmeterol, a medication usually used for asthma, can improve exercise performance in healthy, very fit adults. You will exercise on a bike or treadmill and have your oxygen use measured.
CopenhagenAges 18–40 - NCT06919328Recruiting
Testing a new form of Niagen for energy and fatigue
This trial tests how well a new injectable form of Niagen (a supplement that may boost cellular energy) is absorbed and tolerated compared to NAD+. It may help if you are between 40 and 65, live near the study site, and feel unusually tired.
Huntsville, AlabamaAges 40–65 - NCT06066606Recruiting
Exercise performance and vilanterol study
This trial tests how a common asthma medication affects exercise performance in healthy, fit young adults. You may be able to join if you are very active and have high fitness levels.
Copenhagen, DKAges 18–39
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Common questions
- Are there clinical trials for placebo - control?
- Yes. Clin2 currently lists 3,905 recruiting placebo - control 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 - control 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 - control 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.