Clinical trials
Placebo - Control clinical trials
Below are recruiting placebo - control clinical trials, each written for real people, not researchers. We’re tracking 3,902 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06115603RecruitingPhase 2
Testing CBG for ADHD symptoms
This study tests whether a non-psychoactive compound from hemp called CBG (cannabigerol) can help with ADHD symptoms. You will take CBG capsules or a placebo for several weeks to see if it improves focus and reduces hyperactivity.
Fayetteville, ArkansasAges 18–55 - NCT06112990RecruitingPhase 3
Creatine and exercise to keep muscles strong in prostate cancer
This trial tests if taking creatine plus doing resistance exercises at home can help men with prostate cancer maintain muscle mass and slow cancer growth. You would take creatine or a placebo for 52 weeks and do simple strength exercises twice a week.
Salt Lake City, UtahAges 18 years+ - NCT06105775Recruiting
Nitrate supplement for high blood pressure in pregnancy
This trial tests if a nitrate supplement (similar to beetroot) can help control chronic high blood pressure in early pregnancy. It is for women already taking methyldopa and enrolled before 16 weeks.
Ribeirão Preto, São PauloAges 18 years+ - NCT06107062RecruitingPhase 2
CBD treatment for cannabis concentrate users
This trial tests CBD as a potential treatment for heavy cannabis concentrate users who want to cut down or quit. You would take CBD daily and attend regular visits to track your progress.
Boulder, ColoradoAges 21 years+ - NCT06123156RecruitingPhase 3
Early erectile rehabilitation after rectal cancer treatment
This trial tests if sildenafil (Viagra) given soon after surgery and radiation for rectal cancer can help preserve erectile function. It is for men with normal erectile function before treatment who have a regular partner.
AmiensAges 18–70 - NCT06123715RecruitingPhase 2
Vitamin C to reduce pain after knee replacement
This study tests whether taking vitamin C before and after knee replacement surgery can reduce long-term pain. You may be eligible if you are having knee replacement for osteoarthritis and are generally healthy.
Toronto, OntarioAges 18 years+ - NCT06121492Enrolling by invitationPhase 3
Amino Acid Drink for Muscle Loss in Liver Cirrhosis
This study tests whether taking a daily drink of branched-chain amino acids (a type of protein) can help people with liver cirrhosis who have lost muscle strength and mass. It may help improve muscle size and function.
Bangkok, BangkokAges 18–85 - NCT06118034RecruitingPhase 3
Colchicine for heart surgery recovery
This study tests whether the drug colchicine can reduce inflammation and protect organs during and after planned heart surgery. It may help people recover better.
Nanjing, JiangsuAges 50–80 - NCT04781972RecruitingPhase 4
Brain scan study of ADHD effects from methylphenidate
This study uses brain imaging (MRI) to see how methylphenidate affects brain activity in people with ADHD. It may help doctors better understand how this medicine works and who benefits most.
Baltimore, MarylandAges 6–40 - NCT03202303RecruitingPhase 2
CBDV treatment study for children with autism irritability
This Phase 2 study tests CBDV, a form of cannabis-based medicine, compared with placebo (dummy medicine) in children with autism who have significant irritability and social challenges. It aims to see whether CBDV can improve behavior and overall symptom severity safely over the study period.
New York, New YorkAges 5–18 - NCT06096857RecruitingPhase 2
Cardamom and topical bacteria cream for eczema
This study tests whether taking cardamom by mouth and applying a cream made from a harmless bacteria (Roseomonas) can help treat eczema (atopic dermatitis) in people age 2 and older.
Bethesda, MarylandAges 2–100 - NCT06101745RecruitingPhase 2/Phase 3
Trial to see ureters during abdominal or pelvic surgery
This trial tests a dye called Nizaracianine Triflutate that helps surgeons see the ureters (tubes from kidneys to bladder) during surgery. It aims to make surgery safer by reducing the risk of accidentally injuring the ureters.
Los Angeles, CaliforniaAges 18 years+ - NCT06087536RecruitingPhase 2
Trial of OMN6 for hospital-acquired Acinetobacter pneumonia
This trial tests a new antibiotic called OMN6 for people with a serious lung infection (pneumonia) caught in the hospital or from a breathing machine, caused by a hard-to-treat bacteria (Acinetobacter). The goal is to see if OMN6 is safe and how the body processes it.
AthensAges 18–99 - NCT06096116RecruitingPhase 3
Trial of a blood product for heparin resistance during heart surgery
This study tests a blood-derived medicine (antithrombin) to help people who do not respond well to the blood thinner heparin during heart surgery. It aims to make surgery safer by improving blood thinning.
Stanford, CaliforniaAges 18–85 - NCT06082037RecruitingPhase 3
Testing belumosudil for chronic lung allograft dysfunction after transplant
This trial tests an oral medication called belumosudil for people with chronic lung allograft dysfunction (CLAD) after a double lung transplant. It may help slow the decline in lung function.
Birmingham, AlabamaAges 18 years+ - NCT06083480RecruitingPhase 4
Reducing stress to prevent long-term pain after knee replacement
This trial tests if lowering oxidative stress (damage from natural body processes) during knee replacement surgery can prevent chronic pain afterward. It may help people with osteoarthritis who have moderate to severe pain before surgery.
Nashville, TennesseeAges 50 years+ - NCT06085716RecruitingPhase 2/Phase 3
Combination therapy for advanced cancer fatigue
This study tests a combination of treatments (including education and counseling) to see if they can reduce severe fatigue in people with advanced cancer. It's for patients who are seen at MD Anderson Cancer Center in Texas and can attend sessions in person or online.
Houston, TexasAges 18 years+ - NCT06093477Recruiting
Melatonin and recovery for teens after surgery
This study tests whether taking melatonin (a natural sleep hormone) after a major bone or joint surgery helps teens recover better. If you are 12-18 and having a surgery like scoliosis repair, you may be able to join.
Palo Alto, CaliforniaAges 12–18 - NCT06096597RecruitingPhase 2/Phase 3
Amniotic Membrane Therapy for Bladder Pain
This trial tests a treatment made from amniotic membrane (a natural tissue) to help reduce pain and discomfort in people with Interstitial Cystitis (also called Painful Bladder Syndrome). It is for women who have tried at least one other treatment without success.
Clevleand, OhioAges 18 years+ - NCT06084364RecruitingPhase 4
Steroid vs saline injection vs occupational therapy for thumb arthritis
This study compares a steroid injection (Kenacort), a saltwater (saline) injection, and occupational therapy to see which works best for thumb base osteoarthritis pain. It may help you if you have thumb pain with swelling and want to avoid surgery.
BodøAges 40–85 - NCT06102044RecruitingPhase 3
Zinc for young infants with severe infection in Tanzania
This study tests whether giving zinc supplements to very young babies (under 2 months) with severe infections helps them recover better. It takes place in Tanzania and involves adding zinc to their regular care.
Dar es SalaamAges birth–2 months - NCT06095583RecruitingPhase 3
Toripalimab for limited-stage small cell lung cancer after chemoradiation
This trial tests whether adding toripalimab (an immunotherapy) or toripalimab plus another immunotherapy (tifcemalimab) after standard chemoradiation can help prevent small cell lung cancer from coming back. It is for people with limited-stage disease who have finished initial treatment without the cancer growing.
Harbin, HeilongjiangAges 18 years+ - NCT04724252RecruitingPhase 2/Phase 3
Gabapentin to help children use less opioid after surgery
This study tests whether gabapentin can reduce how much opioid pain medicine children need after certain major chest or heart surgeries. If it works, it may lower opioid-related side effects while still helping with postoperative pain.
Sacramento, CaliforniaAges Up to 17 years - NCT06004115RecruitingPhase 4
Brain scanning study for depression and anxiety
This study uses brain scans (fMRI) to understand how people with both depression and anxiety respond to threat. If you have either or both conditions, participating could help researchers find better treatments.
Tulsa, OklahomaAges 18–65
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Common questions
- Are there clinical trials for placebo - control?
- Yes. Clin2 currently lists 3,902 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.