Clinical trials
Effectiveness clinical trials
Below are recruiting effectiveness clinical trials, each written for real people, not researchers. We’re tracking 6,873 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04101188Recruiting
Study how extra potassium affects blood vessels
This study looks at how eating more potassium may protect blood vessels in healthy people. You may be eligible if you have normal blood pressure and a normal heart rhythm test, and you do not have certain health conditions.
Newark, DelawareAges 18–45 - NCT03956602Recruiting
Snack choices and their effect on blood sugar
This trial studies how different snack types affect quick changes in blood sugar and insulin. It may help researchers understand which snacks cause smaller or larger spikes after eating.
San Diego, CaliforniaAges 18–55 - NCT04135586Recruiting
Exercise program during chemotherapy for triple-negative breast cancer
This trial looks at whether a structured physical exercise program during neoadjuvant chemotherapy can help women with triple-negative breast cancer. You may qualify if you are treated at the specific hospital in Madrid and your tumor matches the required type and size.
MadridAges 25–75 - NCT04183829Recruiting
Study of effects after early induced abortion
This study looks at pregnancy complications and outcomes after someone has an induced abortion in early pregnancy. It may help doctors better understand what to watch for in future pregnancies and how to reduce risks.
Zhongshan, GuangdongAges 18–40 - NCT04395937Recruiting
Study of gentle aerobic exercise to improve severe asthma control
This trial studies whether a lower-intensity aerobic exercise program (not maximal effort) can improve asthma symptoms and control. It is meant for adults with asthma who are still not well controlled despite current inhaler treatments.
Liège, LiegeAges 18–65 - 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 - NCT04277416Enrolling by invitation
Testing a new hip replacement system and how patients do
This study follows people getting a primary total hip replacement using the Entrada hip system to see how long it lasts and how well it works. You may be offered this specific hip implant and would be followed through study visits to measure recovery and outcomes.
Portland, OregonAges 18–80 - NCT04458584Recruiting
Thumb surgery trial comparing treatments for basal joint arthritis
This study looks at how well different thumb (basal joint) surgery approaches restore strength and function. You would be having planned (non-replacement) thumb surgery, and your chosen surgeon would care for you while researchers compare outcomes.
Lebanon, New HampshireAges 21 years+ - NCT04563390Recruiting
Augmented reality therapy for cockroach phobia
This trial tests whether a projection-based augmented reality exposure system can reduce fear and avoidance in adults with cockroach phobia. It uses a structured “practice with cockroaches” experience to help you feel safer over time.
Castellon, CastellónAges 18 years+ - NCT03502590Recruiting
Test of a throat breathing device for people with neck radiation
This study tests how well a specific airway device works during general anesthesia for people who had radiation therapy to the neck. It may help improve safety and comfort during planned surgeries.
LivingstonAges 18 years+ - NCT03552705RecruitingPhase 2
Tranexamic acid to reduce knee inflammation after ACL injury
This Phase 2 study tests whether tranexamic acid can reduce swelling and protect knee cartilage after an ACL injury. It may help by limiting bleeding-related inflammation in the injured joint soon after injury.
Stanford, CaliforniaAges 18–30 - NCT05351216Recruiting
Sirolimus safety with routine vaccines for a rare blood vessel tumor
This trial studies how the medicine sirolimus affects children’s response to routine vaccines during treatment for kaposiform hemangioendothelioma (KHE). It compares vaccinated KHE patients taking sirolimus with healthy children getting the same vaccines.
Shanghai, Shanghai MunicipalityAges Up to 12 years - NCT03299179Recruiting
Female hormones and brain blood flow during MRI
This study checks how female hormones may change blood flow in the brain. You may be asked to undergo an MRI scan while hormone levels are assessed.
GhentAges 18–25 - NCT05593627RecruitingPhase 4
Lithium to improve sleep and thinking after heart surgery
This trial tests whether lithium carbonate can improve sleep and thinking (cognitive function) after heart valve surgery that uses a heart-lung machine. It may help some people who have trouble sleeping or thinking after surgery, but it excludes people with significant sleep or thinking problems before surgery.
Shenyang, LiaoningAges 18–65 - NCT02563600Recruiting
Text support to help women attend pelvic floor physiotherapy
This study tests whether brief text-message support can improve how often people attend pelvic floor physiotherapy appointments. It may help by offering reminders or encouragement while you are waiting for care.
SwanseaAges 18 years+ - NCT03137095Recruiting
Study how chemotherapy affects brain function in breast cancer
This study looks at changes in thinking and brain function in people with early to locally advanced breast cancer before and during chemotherapy. You may also be offered a brain MRI in a separate optional part of the research to learn more about brain changes.
Rochester, New YorkAges 21 years+ - NCT05598112RecruitingEarly Phase 1
Oral stool-based microbiome treatment for healthy aging
This early-stage study tests whether changing the gut bacteria using an oral stool-based treatment (called oral FMT) can improve health in older adults. It aims to see if this approach affects aging-related changes, including gut and body function.
Beijing, Beijing MunicipalityAges 70–85 - NCT06933537Recruiting
Personalized brain stimulation for emotional disorders in MS and NMOSD
This trial tests if a gentle brain stimulation technique can help with anxiety in people with multiple sclerosis (MS) or neuromyelitis optica spectrum disorder (NMOSD). It uses a mild electrical current through the scalp to regulate mood, and the treatment is customized to each person.
Beijing, Beijing MunicipalityAges 18–65 - NCT05625373RecruitingPhase 2/Phase 3
Antibiotic powder during groin surgery to prevent infection
This trial studies whether placing an antibiotic powder (vancomycin) directly in the surgical wound during groin lymph node surgery can lower the risk of surgical site infections. It may help reduce wound infections after surgery for vulvar dysplasia.
Providence, Rhode IslandAges 18 years+ - NCT05415761Recruiting
Mobile phone support to help you quit smoking in clinic
This study tests different texting/app-based ways to help people quit smoking, especially those who may have less access to care. You may be assigned to one approach and get support through your phone.
Gainesville, FloridaAges 21 years+ - NCT05599776Recruiting
Smart ring-guided rehab after knee replacement surgery
This study tests whether using a smart ring along with physical therapy after knee replacement helps people recover better. It mainly looks at people’s rehab progress in the weeks after surgery.
Tampere, PirkanmaaAges 18–70 - NCT07667738RecruitingPhase 2
Parent support program in Peru for parents of young children
This study tests a therapy program called CETA for parents in a specific area of Lima, Peru. It aims to help parents improve their mental health, which may also benefit their children ages 4 to 6.
LimaAges 18 years+ - NCT07666100Recruiting
Study of medication side effects in a periodontology clinic
This study looks at side effects from medications prescribed in a gum disease clinic. It aims to understand what types of side effects patients experience, which can help doctors choose safer medicines.
SivasAges 16 years+ - NCT07590674Recruiting
Balance training for competitive tennis players
This study compares two types of balance training to see which one better improves tennis players' ability to move quickly and change direction on court. You'll do either reactive balance exercises (responding to sudden movements) or traditional balance exercises over the study period.
IslamabadAges 18–25
Hear when a new Effectiveness trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for effectiveness?
- Yes. Clin2 currently lists 6,873 recruiting effectiveness 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 effectiveness 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 effectiveness 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.