Clinical trials
Placebo - Control clinical trials
Below are recruiting placebo - control clinical trials, each written for real people, not researchers. We’re tracking 3,904 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07647198RecruitingPhase 2
Green tea extract and vitamin D to prevent fibroid return
This study tests whether two natural supplements—green tea extract (EGCG) and vitamin D—can help prevent uterine fibroids from coming back after treatment. You would take these supplements for 12 months while avoiding pregnancy.
Abu Dhabi, United Arab Emirates (uae)Ages 18 years+ - NCT06685978RecruitingPhase 3
Study of Xiangjurupining Capsule for Breast Lumps and Pain
This trial tests a Chinese herbal capsule (Xiangjurupining) for women with breast hyperplasia (non-cancerous breast lumps and pain). It aims to see if the capsule can safely reduce pain and improve symptoms over several menstrual cycles.
Beijing, Beijing MunicipalityAges 18–50 - NCT06686472RecruitingPhase 2
Testing TL-925 eye drops for allergic conjunctivitis
This trial tests an investigational eye drop called TL-925 to see if it can treat allergic conjunctivitis (eye allergies). If you have a history of eye allergies and a positive allergy skin test, you may be able to join.
Memphis, TennesseeAges 18 years+ - NCT06601335RecruitingPhase 3
New immunotherapy combo for head and neck cancer
This trial tests a new combination of two immunotherapy drugs (AK112 and AK117) versus the standard immunotherapy pembrolizumab for people with advanced head and neck cancer that hasn't been treated before.
Wuhan, HubeiAges 18–75 - NCT07643818Enrolling by invitationPhase 2
Intravenous iron for heart failure patients with low iron
This study tests whether giving intravenous iron improves symptoms, quality of life, and exercise ability in people with heart failure and low iron levels. Participants will receive iron infusions and be monitored over time to see if their condition improves.
Saint HelierAges 18 years+ - NCT06689254RecruitingPhase 2
Testing mifepristone for hard-to-treat PTSD in Dutch adults
This study tests a new medicine (mifepristone) to see if it helps people with PTSD that hasn't improved after standard treatments. You must be fluent in Dutch and have tried at least two PTSD treatments, including trauma-focused therapy.
Amsterdam, North HollandAges 18 years+ - NCT07639268Enrolling by invitation
Support program for advanced cancer patients and their caregivers
This study tests a support program designed to help advanced cancer patients (stage III or IV) and their caregivers manage stress and emotional distress together. The program aims to improve coping and quality of life for both the patient and the person caring for them.
Ponce, PRAges 21–105 - NCT07641634RecruitingPhase 1/Phase 2
Testing PRO-203 for active systemic sclerosis
This trial tests a new investigational medicine called PRO-203 for people with systemic sclerosis (scleroderma). It aims to see if the medicine can help control active disease that hasn't responded to other treatments.
Melbourne, VictoriaAges 18–65 - NCT07643766RecruitingPhase 2
Testing ENV-294 for moderate-to-severe atopic dermatitis
This study tests whether a new medication called ENV-294 can help adults with moderate-to-severe atopic dermatitis (eczema) that hasn't responded well to other treatments. The trial will check if the drug reduces itching and skin inflammation safely.
Encinitas, CaliforniaAges 18 years+ - NCT07640425RecruitingPhase 1/Phase 2
Testing a new collagenase injection for Dupuytren's contracture
This study tests whether a new injectable enzyme called CNT201 can safely and effectively treat Dupuytren's contracture—a condition where fingers curl and can't straighten. The injection aims to break down the thick tissue cords causing the problem, without surgery.
Kippa-Ring, QueenslandAges 18–75 - NCT07640451RecruitingPhase 2
HRS-9821 inhalation treatment for moderate to severe COPD
This trial tests whether an inhaled medication called HRS-9821 can help people with moderate to severe COPD (chronic obstructive pulmonary disease) breathe better and reduce symptoms. You inhale the medication, and researchers will measure how well your lungs work and how you feel over time.
Shanghai, Shanghai MunicipalityAges 40–80 - NCT07643623RecruitingPhase 2/Phase 3
Immunotherapy for operable stomach cancer before and after surgery
This trial tests a combination of immunotherapy drugs (sintilimab, chemotherapy, and sometimes ipilimumab) given before surgery to shrink stomach or esophageal junction tumors, then continued after surgery. The goal is to improve survival in patients with resectable (removable) gastric or gastroesophageal junction cancer.
Guangzhou, GuangdongAges 18 years+ - NCT07644052RecruitingPhase 3
Study of a new medicine to ease cannabis withdrawal
This study tests a new medicine, PP-01, to help adults who use cannabis daily and want to quit. It aims to reduce withdrawal symptoms like anxiety, irritability, and sleep problems during the first week after stopping.
Little Rock, ArkansasAges 18–55 - NCT07644364RecruitingPhase 1
Blood Pressure Medication Study for Japanese Adults
This early-stage trial tests a new blood pressure medication called HJB647 in Japanese adults with elevated or high blood pressure. The study aims to see if the drug is safe and how the body handles it.
Sumida Ku, TokyoAges 18–60 - NCT05272579RecruitingEarly Phase 1
Phage treatment to help gut development in very preterm babies
This early-phase trial tests whether giving a specific bacteria-fighting treatment (called bacteriophage) through the gut can help preterm babies’ intestinal development mature faster. It may help reduce early gut-related problems, but the study is mainly to check safety and early effects.
CopenhagenAges Any age - NCT04925414RecruitingPhase 4
Testing high-flow oxygen for migraine in the emergency room
This trial looks at whether breathing high-flow oxygen in the emergency department can help relieve migraine-like headaches. You may qualify if you are 18+ and are admitted to the ER for a migraine that fits standard diagnostic rules.
NiceAges 18 years+ - NCT07644000Recruiting
Hydrogen inhalation and exercise response in healthy women
This study tests whether breathing in molecular hydrogen before exercise affects how your body uses energy during physical activity. Researchers want to see if this simple intervention might improve exercise performance or recovery in healthy women.
OlomoucAges 18–30 - NCT07641075Recruiting
High-Dose Vitamin D Effects in Experienced Athletes
This study tests whether high-dose vitamin D supplements improve athletic performance, brain function, and body composition in experienced athletes. Researchers will measure hormones, muscle strength, thinking ability, and muscle mass over time.
Katowice, Mikołowska 72aAges 17–60 - NCT07639177RecruitingPhase 2
Fecal Microbiota Transplant for Hard-to-Treat Rheumatoid Arthritis
This trial tests whether transferring healthy gut bacteria from a donor to patients with rheumatoid arthritis that hasn't improved on standard medications can reduce joint pain and swelling. The goal is to see if rebalancing the gut microbiome (the community of bacteria in your intestines) helps control inflammation.
Beijing, Beijing MunicipalityAges 18–65 - NCT07643558Recruiting
Fish oil and weight training for cancer patients' muscle health
This study tests whether taking fish oil supplements combined with progressive weight training exercises can help preserve or build muscle strength in cancer patients undergoing treatment. The goal is to help you maintain physical function and quality of life during cancer care.
Erlangen, BavariaAges 18 years+ - NCT07642869Recruiting
Vitamins and minerals for healthy aging in middle-aged adults
This study tests whether taking a daily multivitamin and mineral supplement helps middle-aged adults stay healthier and more active as they age. Researchers will track changes in your fitness, energy, and overall wellness over the study period.
La Jolla, CaliforniaAges 40–60 - NCT07642505RecruitingPhase 4
L-Citrulline and Tadalafil for Mild Erectile Dysfunction
This study tests whether two compounds—L-citrulline (a natural amino acid) and tadalafil (a common erectile dysfunction medication)—work well together for men with mild to moderate erectile problems. The goal is to see if this combination safely improves sexual function.
Banī Suwayf, Beni Suweif GovernorateAges 30–70 - NCT07641335Recruiting
Caffeine's Effects on Chess Playing and Thinking Skills
This study tests whether caffeine helps professional chess players think more clearly and play better. Researchers will measure your chess performance and mental focus after you take caffeine or a placebo.
St Louis, MissouriAges 18–50 - NCT07638865Recruiting
CoQ10 supplement for enlarged prostate symptoms
This trial tests whether a natural supplement called CoQ10 (Ralivia) can help reduce urinary symptoms caused by an enlarged prostate. You'll take the supplement and have your symptoms monitored over time.
ThessalonikiAges 50–80
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Common questions
- Are there clinical trials for placebo - control?
- Yes. Clin2 currently lists 3,904 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.