Clinical trials · California
Down Syndrome clinical trials in California
We’re tracking 274 recruiting down syndrome studies with a site in California — including Phase 1, Phase 1/Phase 2, Phase 2 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT06215222Recruiting
Studying gut bacteria in IBS and digestive issues
This study uses a tiny capsule to collect samples from your small intestine to learn about gut bacteria in people with IBS or other functional gut disorders. It could help researchers understand what causes digestive symptoms.
Redwood City, CaliforniaAges 18–70 - NCT06112418Recruiting
Personalized vs standard care to prevent heart attacks
This trial compares two ways to prevent heart attacks and strokes: one uses a special heart CT scan to guide care, the other uses standard risk factors like blood pressure and cholesterol. You may be eligible if you are older (men over 55, women over 65) and have diabetes, prediabetes, or metabolic syndrome.
Beverly Hills, CaliforniaAges 55 years+ - NCT06366230RecruitingPhase 1/Phase 2
Adding urea to final dialysis fluid
This trial tests adding urea to the final dialysis fluid for people with very high urea levels. It aims to make dialysis safer and more effective for those who need it urgently.
San Francisco, CaliforniaAges 18 years+ - NCT06369753Recruiting
Study on visible belly swelling after meals
This study looks at people whose belly visibly swells after eating. The goal is to understand this condition and track symptoms over time.
Los Angeles, CaliforniaAges 18–80 - NCT06428019RecruitingPhase 3
Comparing drug combinations for untreated CLL or SLL
This trial tests two different drug combinations (venetoclax with obinutuzumab or with acalabrutinib) to see how they affect the risk of tumor lysis syndrome in people with untreated CLL or SLL. It may help find the safest and most effective way to start treatment.
Clovis, CaliforniaAges 18 years+ - NCT06462365RecruitingPhase 1
Preventing GvHD after stem cell transplant for blood cancers
This trial tests a new way to prevent graft-versus-host disease (GvHD), a common complication after a stem cell transplant. It is for people with certain blood cancers who are getting a stem cell transplant from a half-matched family member or unrelated donor.
Duarte, CaliforniaAges 18 years+ - NCT06498973RecruitingPhase 1
Maintenance therapy after stem cell transplant for CD123-positive AML/MDS
This trial tests a combination of two drugs, tagraxofusp and azacitidine, given as maintenance therapy after a stem cell transplant. The goal is to prevent the leukemia or MDS from coming back in patients whose cancer cells carry a specific marker called CD123.
Duarte, CaliforniaAges 18–75 - NCT06539169Recruiting
Following people with rare diseases over time
This study follows people with rare diseases over time to learn more about how these conditions progress and how they are treated. Joining may help researchers understand your disease better and find better ways to care for others.
Los Altos, CaliforniaAges Any age - NCT06539507RecruitingPhase 1
Study of BCX17725 for Netherton syndrome safety
This trial tests a new drug called BCX17725 in people with Netherton syndrome to see if it is safe and how the body handles it. It may help by reducing skin symptoms like redness and scaling.
Palo Alto, CaliforniaAges 12–65 - NCT06543381RecruitingPhase 1
Olutasidenib for IDH1-mutated blood cancers after transplant
This trial tests a drug called olutasidenib for people with certain blood cancers (AML, MDS, or CMML) that have a specific IDH1 gene change. The goal is to see if it can help prevent relapse after a donor stem cell transplant.
Duarte, CaliforniaAges 18 years+ - NCT06551584RecruitingPhase 1
Advanced blood cancer trial with stem cell transplant
This trial tests a new approach for people with advanced blood cancers who are getting a donor stem cell transplant. It aims to improve outcomes by using your own regulatory T cells along with the donor cells.
Palo Alto, CaliforniaAges 18–70 - NCT07020533RecruitingPhase 1
CMV vaccine for stem cell transplant recipients
This trial tests a vaccine designed to boost immunity against CMV (a common virus) and prevent active CMV infection in people receiving a half-matched stem cell transplant. It may help protect you from CMV-related complications after transplant.
Duarte, CaliforniaAges 18–75 - NCT06684119Recruiting
Testing best breathing tube pressure for children on a ventilator
This trial uses a special imaging tool (EIT) to find the best air pressure in the breathing tube for children on a ventilator. It aims to improve lung function in children with a lung condition called PARDS.
Los Angeles, CaliforniaAges birth–18 years - NCT03530852Recruiting
RELIZORB test for children needing tube feeding and IV nutrition
This study tests whether RELIZORB helps children with short bowel syndrome (SBS), who rely on IV nutrition (and also tube feeding), absorb fats better. It is an open-label study over 90 days, meaning everyone gets the study treatment and outcomes are compared over time.
Los Angeles, CaliforniaAges 2–18 - NCT06789445RecruitingPhase 1/Phase 2
Cell therapy for inherited retinal disease (CLARICO)
This study tests a new cell therapy (OpCT-001) for adults with inherited retinal diseases that affect the light-sensing cells. It aims to see if the treatment is safe and possibly helps improve vision.
Los Angeles, CaliforniaAges 18 years+ - NCT05635747Enrolling by invitation
90-day follow-up study for children using RELiZORB
This study follows children who are already taking RELiZORB to see how it’s going over time and whether it remains safe and tolerable, with effects on nutrient absorption. It doesn’t change treatment—it mainly looks at outcomes during the next 90 days.
Los Angeles, CaliforniaAges 2–18 - NCT06710067Recruiting
Urine chemicals for diagnosing disease
This study looks at chemicals in urine to help find new ways to diagnose diseases. You give one urine sample and answer a few questions—no treatment or long-term follow-up needed.
Encinitas, CaliforniaAges 18 years+ - NCT06715787Recruiting
Perinatal support program for pregnant people
This trial tests a support program for pregnant individuals who qualify for certain food assistance benefits. It aims to see if the program helps with pregnancy and infant health.
Los Angeles, CaliforniaAges 18 years+ - NCT06727422RecruitingPhase 2
Rifaximin plus NAC for IBS with diarrhea
This trial tests whether a combination of two medications—rifaximin (a gut antibiotic) and NAC (a supplement that helps break down mucus)—can reduce belly pain and diarrhea in people with IBS whose symptoms are not well controlled. It may be an option if other treatments haven't worked well enough.
Los Angeles, CaliforniaAges 18 years+ - NCT06806033RecruitingPhase 2
New drug combo for relapsed aggressive B-cell lymphoma
This trial tests a new combination of drugs (glofitamab plus gemcitabine and oxaliplatin) for people with aggressive B-cell lymphoma that has returned or not responded to prior treatment. The goal is to see if this approach can improve outcomes while managing side effects.
Clovis, CaliforniaAges 18 years+ - NCT06815003RecruitingPhase 2
Preventing Graft-Versus-Host Disease After Stem Cell Transplant
This trial tests a combination of three drugs (vedolizumab, cyclophosphamide, and tacrolimus) to prevent graft-versus-host disease, a common complication after a donor stem cell transplant. It is for people with certain blood cancers who are getting a reduced-intensity transplant.
Duarte, CaliforniaAges 18–80 - NCT06834282RecruitingPhase 1
A study of CER-1236 for certain blood cancers
This trial tests an experimental cell therapy called CER-1236 for people with acute myeloid leukemia, myelodysplastic syndrome, or myelofibrosis. It aims to see if it can help treat these cancers.
Sacramento, CaliforniaAges 18–85 - NCT06859424RecruitingPhase 2
Testing a new GVHD prevention method after donor stem cell transplant
This trial tests a new way to prevent graft-versus-host disease (a common side effect of stem cell transplant) using a drug called cyclophosphamide after transplant. It is for adults with certain blood cancers who need a transplant from a partially matched unrelated donor.
Palo Alto, CaliforniaAges 18–66 - NCT06927739RecruitingPhase 2
Orticumab for heart artery inflammation after a heart attack
This trial tests a drug called orticumab to see if it can reduce inflammation in the arteries of the heart after a heart attack. It may help prevent future heart problems.
Los Angeles, CaliforniaAges 18 years+
Down Syndrome trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting down syndrome studies listed above.
- City of Hope Comprehensive Cancer Center · 6 studies
- Children's Hospital Los Angeles · 3 studies
- Stanford University · 2 studies
- The Lundquist Institute at Harbor-UCLA Medical Center · 2 studies
- University of Southern California · 2 studies
- Valkyrie Clinical Trials · 2 studies
- Zuckerberg San Francisco General Hospital and Trauma Center · 2 studies
- Abcentra Investigational Site
What taking part in a down syndrome study involves
A screening visit first
Before anything else, the study team checks whether you fit — usually a visit with some tests. You can stop at any point, and screening is typically free.
Care at a nearby site
Study visits happen at a clinic or hospital taking part. Many studies cover the cost of the study treatment and related visits, and some reimburse travel.
You stay in control
Taking part is voluntary and you can leave a study at any time, for any reason, without affecting your regular care.
The team decides eligibility
Our fit check is a helpful first read, not a decision. The study team makes the final call after reviewing your health history.
Down Syndrome trials in other states
Common questions
- Are there down syndrome clinical trials in California?
- Yes. We're currently tracking 274 recruiting down syndrome studies with a site in California, each rewritten in plain language so you can see what it's testing and who it's for.
- How do I find out if I qualify for a down syndrome study in California?
- Each study lists its eligibility rules — age, diagnosis, prior treatments. On every trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Do I have to live in California to take part?
- Not necessarily. These studies have a site in California, but eligibility is about your health, not your address — some people travel to take part, and a few studies reimburse travel. The study team can tell you what's required.
- Does it cost anything to join a down syndrome trial?
- Using Clin2 is always free. Many trials cover the study treatment and related visits; some reimburse travel. The study team explains exactly what's covered before you decide.
Not the right time?
New down syndrome studies open in California regularly. Set up a health profile and we’ll quietly watch for studies that fit you and email you when one opens.
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.