Clinical trials
Efficacy and Safety clinical trials
Below are recruiting efficacy and safety clinical trials, each written for real people, not researchers. We’re tracking 2,733 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04734106RecruitingEarly Phase 1
Aloe vera for bladder pain and frequent urination
This early-stage study tests whether aloe vera can reduce symptoms of interstitial cystitis, such as bladder pain and frequent urination. You’d help researchers check both safety and symptom relief.
Winston-Salem, North CarolinaAges 18–80 - NCT04745221Recruiting
Fecal microbes therapy to help prevent graft-versus-host disease
This trial studies a treatment made from donor gut microbes to help prevent a common complication after a transplant called acute graft-versus-host disease (aGVHD). It may help by improving the balance and variety of gut bacteria during recovery after haploidentical transplant.
Suzhou, JiangsuAges 18–60 - NCT04730700Recruiting
Radiofrequency treatment test for facet back pain
This study compares a nerve procedure (radiofrequency “neurotomy” using an expandable electrode) to non-procedure medical care for long-lasting low back pain from facet joints. It aims to see whether the procedure helps more safely than conservative treatment.
Kansas City, KansasAges 18 years+ - NCT04746677Recruiting
Stent repair for complex aortic problems when standard options fail
This trial tests whether a specially built stent-graft made for your anatomy can be done safely and effectively for complex aortic disease. It may help people who are too risky for open surgery or who cannot wait for a standard custom device to be made.
Boston, MassachusettsAges 21 years+ - NCT04762459Enrolling by invitationPhase 3
Almonertinib after lung tumor surgery, with or without chemo
This study tests whether almonertinib taken after complete surgery can improve outcomes for people with stage II–IIIA non-small cell lung cancer (NSCLC) that has certain EGFR gene changes. It also compares almonertinib plus chemotherapy versus almonertinib alone to see which approach is safer and works better.
Beijing, Beijing MunicipalityAges 18–130 - NCT04685317Recruiting
Sentinel brain-protection device during atrial fibrillation ablation
This trial tests whether a specialized “brain protection” device can improve safety during atrial fibrillation (AF) catheter ablation. It may help reduce the risk of stroke or related complications while treating AF.
Rochester, MinnesotaAges 18 years+ - NCT04713787RecruitingPhase 2
Test higher doses of oxfendazole against single-dose albendazole
This trial studies which dose of oxfendazole works best and is safest for treating a specific intestinal worm infection in adults. It compares different oxfendazole doses to one standard dose of albendazole, and uses stool and blood testing over about 4–6 weeks.
Santa Clara, MaynasAges 18–65 - NCT04728893RecruitingPhase 2
Nemtabrutinib for blood cancers after prior treatment
This Phase 2 trial tests nemtabrutinib (MK-1026), an oral medicine, in people with certain blood cancers that have come back or didn’t respond to earlier treatments. It aims to see how well the drug works and whether it is safe.
Springdale, ArkansasAges 18 years+ - NCT04752774RecruitingPhase 1/Phase 2
Botox-like injection study for arm spasticity after stroke
This trial tests whether IPN10200, a Botox-like treatment, is safe and helps reduce stiff, tight upper-arm muscles caused by spasticity after stroke or brain injury. You may be able to join if you meet specific timing, prior-treatment, and muscle-stiffness measurements.
Downey, CaliforniaAges 18–70 - NCT04689152RecruitingPhase 3
Cell treatment via liver artery catheter for alcoholic cirrhosis
This Phase 3 trial tests whether a cell medicine called Cellgram-LC, delivered through a catheter into the liver artery, is safer and works better for people with alcoholic cirrhosis. It may help improve outcomes in people with more advanced liver scarring.
AnsanAges 20–71 - NCT04628585Enrolling by invitation
Follow-up for people with sickle cell treated with gene therapy
This study is a long-term follow-up for people who already received gene therapy for sickle cell disease in a specific sponsor’s clinical trial. It helps researchers watch for long-term safety and outcomes over time.
Birmingham, AlabamaAges 2–53 - NCT04496609Recruiting
Testing a spinal stimulation treatment for incomplete spinal cord injury
This trial studies whether a spinal cord stimulation approach plus rehab can improve function and safety in people with an incomplete spinal cord injury who cannot walk. It may help people by supporting rehabilitation over time, but it requires surgery and specific health and imaging conditions.
GarchesAges 18–65 - NCT04396899RecruitingPhase 1/Phase 2
Stem cell heart patch for advanced heart failure
This early-phase study tests a lab-made heart tissue (“engineered myocardium”) placed surgically to help the heart work better in people with advanced heart failure. It mainly checks safety first, and also looks for signs the patch can improve heart function in selected patients.
Göttingen, Lower SaxonyAges 18–80 - NCT04427241RecruitingPhase 4
Testing Cerebrolysin for prolonged brain injury after bleeding stroke
This study tests whether Cerebrolysin can improve recovery in people who remain in a vegetative or minimally conscious state more than 4 weeks after a bleeding stroke. It also tracks safety, to make sure the treatment is not causing harmful side effects.
SeoulAges 19–120 - NCT04482478Recruiting
Edl treatment trial for functional indigestion symptoms
This trial studies whether EDL medicine can improve symptoms of functional dyspepsia (indigestion) and is safe for people with this condition. You may be asked to complete symptom questionnaires and undergo stomach testing to confirm there is no other cause for your symptoms.
Seongnam-si, Gyeonggi-doAges 19 years+ - NCT04405583Recruiting
Follow-up study for a heart device in heart failure patients
This study follows people with chronic heart failure to see how well an implanted device (called the Occlutech AFR) works and whether it is safe over time. It may help doctors better understand who benefits and how to manage treatment safely.
BesançonAges 18 years+ - NCT04480853RecruitingPhase 4
Fingolimod start study for adults with relapsing MS
This study checks how safe and effective fingolimod is when adults with relapsing-remitting multiple sclerosis start it for the first time. It may help confirm whether this treatment works well and is tolerated in newly treated patients.
Kaohsiung CityAges 20–100 - NCT04342910RecruitingPhase 3
Test camrelizumab plus apatinib for advanced stomach cancer
This trial studies whether combining camrelizumab (an immunotherapy) and apatinib (a targeted pill) can control advanced, unresectable stomach or gastroesophageal junction cancer that has grown after first treatment. It also looks at how safe the combination is.
BeijingAges 18 years+ - NCT04373473RecruitingPhase 2
Oral stool treatment to prevent ulcerative colitis flare-ups
This study tests whether taking freeze-dried (lyophilized) donor stool material by mouth can help prevent ulcerative colitis from coming back or causing intestinal inflammation. Participants are in remission and stay on their usual treatment while receiving the study product.
Houston, TexasAges 18 years+ - NCT04271956RecruitingPhase 2
Study drugs for Richter transformation in CLL
This Phase 2 study tests zanubrutinib plus tislelizumab, with or without sonrotoclax, for people whose CLL has changed into Richter transformation (an aggressive lymphoma). It aims to improve anti-cancer response while tracking side effects and safety.
ViennaAges 18 years+ - NCT04227314RecruitingPhase 3
Apremilast vs placebo for severe recurrent mouth ulcers
This Phase 3 trial tests whether apremilast can reduce severe, recurring mouth ulcers compared with an inactive placebo. It aims to improve ulcer frequency and pain while carefully checking safety.
AmiensAges 18 years+ - NCT04206852Recruiting
Balloon treatment for chronic blood-clot lung vessel disease
This trial tests whether a procedure called balloon pulmonary angioplasty is safe and effective for people with chronic thromboembolic disease in the lungs, especially when surgery isn’t an option. If you have CTEPH, it may help improve lung blood flow and symptoms.
BeijingAges 18 years+ - NCT04165070RecruitingPhase 1/Phase 2
Stage IV lung cancer trial using pembrolizumab with or without chemotherapy
This Phase 1/2 study tests pembrolizumab (an immune-based cancer treatment) either alone or with chemotherapy in people newly diagnosed with stage IV non-small cell lung cancer (NSCLC). It looks at how well the treatments work and whether they are safe, especially in people who haven’t had treatment yet for metastatic disease.
Gilbert, ArizonaAges 18 years+ - NCT04184973Recruiting
Testing a colon bypass device during colorectal cancer surgery
This trial studies a device (CG-100) placed inside the bowel to see if it can improve safety and outcomes during surgery for colorectal cancer. You would be asked to follow extra study check-ins after your operation, and the team would monitor whether the device works as intended.
Irvine, CaliforniaAges 22–70
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Common questions
- Are there clinical trials for efficacy and safety?
- Yes. Clin2 currently lists 2,733 recruiting efficacy and safety 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 efficacy and safety 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 efficacy and safety 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.