Clinical trials · California
Health clinical trials in California
We’re tracking 342 recruiting health studies with a site in California — including Phase 1, Phase 2, Phase 3 and Phase 4 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT06872190Recruiting
CDS tool for opioid use disorder in the ED
This trial tests a clinical decision support tool for emergency department providers at UCSF. It helps doctors give better care that considers social needs alongside opioid use treatment. The study will ask providers and patients about how well this tool works.
San Francisco, CaliforniaAges 18 years+ - NCT06848088Enrolling by invitationPhase 2
Long-term health study for melanoma participants
This study checks on the long-term health of adults with melanoma who took part in a previous treatment study. It aims to see how participants are doing over time after receiving the new therapy.
San Francisco, CaliforniaAges 18 years+ - NCT06856057Recruiting
Support for caregivers and kids after injury
This study helps parents and young children cope with stress after a hospital stay for an injury. It tests a program to improve mental health for both caregivers and kids.
Los Angeles, CaliforniaAges 18 years+ - NCT06854198Recruiting
Glaucoma screening for at-risk Californians
This study tests whether offering eye exams at a health center helps find glaucoma early in people who are at higher risk. It may help you catch vision problems before they get worse.
Fremont, CaliforniaAges 50 years+ - NCT05002751Recruiting
Measuring how radiation affects vaginal narrowing in cervical cancer
This study measures how radiation therapy changes the vagina’s flexibility and shape in people with newly diagnosed, advanced cervical cancer that has spread to nearby lymph nodes. The goal is to better understand what happens over time, which may help guide prevention and treatment of vaginal narrowing.
La Jolla, CaliforniaAges 18–99 - NCT06843577Recruiting
Handgrip therapy for high blood pressure
This trial tests if a simple handgrip exercise device can help lower blood pressure in people with elevated blood pressure or hypertension. You will use the device at home and have regular check-ups to see how well it works.
West Hills, CaliforniaAges 22 years+ - NCT05751863Recruiting
Sedation-first vs usual care in ventilated trauma patients
This study compares how pain medicine and calming medicine are started in critically injured (trauma) adults who are on a breathing machine. It aims to see whether a specific “analgesia-first” approach can improve comfort and support breathing weaning.
Long Beach, CaliforniaAges 18 years+ - NCT06837181Recruiting
Understanding diabetes complications in cystic fibrosis
This study looks at how long-term diabetes affects people with cystic fibrosis. It helps researchers understand complications and improve care.
Palo Alto, CaliforniaAges 12 years+ - NCT06835582Enrolling by invitation
Checking Methadone and Its Breakdown Levels
This study is checking the levels of methadone and its breakdown products in your blood. It helps make sure the medication is working safely for conditions like opioid use disorder or chronic pain.
Lemon Grove, CaliforniaAges 18–70 - NCT06660758Recruiting
Pilot study of Entarik device in healthy adults
This study tests a new version of the Entarik system, a device that goes through a feeding tube, in healthy adults. It helps researchers see if the system works safely and as intended.
Berkeley, CaliforniaAges 18 years+ - NCT06808828Recruiting
Occupational therapy for survivors of partner violence
This trial tests if occupational therapy can help adults who have experienced intimate partner violence improve daily living skills and well-being. It is open to anyone 18 or older already getting help from a domestic violence organization.
Loma Linda, CaliforniaAges 18–70 - NCT06796686RecruitingPhase 1
HIV vaccine safety and immune response study for healthy adults
This trial tests a new two-part HIV vaccine regimen in healthy adults without HIV. The goal is to see if it is safe and produces an immune response that could help prevent HIV.
San Francisco, CaliforniaAges 18–55 - NCT05701111Recruiting
School-based treatment for teens with trauma symptoms
This study tests a school-based approach to help teens who have experienced trauma and now have post-trauma symptoms. It also collects emotional and physical (biologic) information to understand how treatment may help.
Palo Alto, CaliforniaAges 11–17 - NCT06797245Recruiting
App-based treatment for overactive bladder in women
This trial tests a prescription digital app to help women with overactive bladder (OAB) symptoms. It may be a good fit if you are a woman over 22 with bothersome OAB and are willing to use the app instead of other treatments for 8 weeks.
Palo Alto, CaliforniaAges 22 years+ - NCT06790784RecruitingPhase 3
Comparing faricimab plus laser vs. surgery for diabetic eye disease
This study compares two approaches to treat advanced diabetic eye disease (proliferative diabetic retinopathy): injections of faricimab plus laser, versus surgery (vitrectomy) with laser. It is for people with diabetes who need treatment for PDR and still have relatively good vision (20/100 or better) in the affected eye.
Loma Linda, CaliforniaAges 18 years+ - NCT06763770Enrolling by invitation
Digital support for young adult cancer survivors
This trial tests a digital program that combines self-management tools and peer mentoring to help young adults who had childhood cancer transition to long-term follow-up care.
Los Angeles, CaliforniaAges 18–25 - NCT06768749Recruiting
Melatonin lotion for better sleep and mood
This trial tests whether using a scented melatonin lotion before bed can improve sleep and reduce anxiety or depression symptoms. It may be a good fit if you have mild sleep problems and some mood symptoms but are not currently taking medication for them.
Redlands, CaliforniaAges 18–21 - NCT06738407RecruitingPhase 4
Doxycycline to prevent STIs in high-risk people
This study tests whether taking a daily antibiotic (doxycycline) can prevent sexually transmitted infections in people at high risk. If you've had an STI recently and sometimes have sex without condoms, you might be able to join.
Los Angeles, CaliforniaAges 13–29 - NCT06741865Recruiting
Helping older adults keep their minds sharp (INSPIRE-Faith)
This trial tests whether certain lifestyle and thinking exercises help preserve memory and brain function in older adults, especially in the African American community. You may join if you are 55 or older and your memory is normal or mildly impaired.
Los Angeles, CaliforniaAges 55–85 - NCT06724965Recruiting
Trauma treatment and PrEP support for transgender and nonbinary adults
This study combines a proven trauma treatment (STAIR) with peer-led PrEP navigation to help transgender and nonbinary people cope with stress and stay HIV-free. It aims to improve mental health and increase PrEP use.
Los Angeles, CaliforniaAges 18 years+ - NCT06724172Recruiting
Comparing health programs for pregnant mothers from diverse backgrounds
This study tests two different health programs for pregnant women to see which one helps mothers and babies more. You may join if you are early in your pregnancy, identify as Black, Hispanic, or have Medicaid, and speak English or Spanish.
Palo Alto, CaliforniaAges 18 years+ - NCT06699056Recruiting
AI heart monitor study for ejection fraction
This study uses an AI-powered wearable monitor to check how well your heart pumps blood (ejection fraction) from a simple EKG recording. It may help doctors quickly assess heart function without extra tests.
Orange, CaliforniaAges 18 years+ - NCT06415721Recruiting
TMS guided by brain scans for alcohol use disorder
This study uses a brain stimulation technique called TMS combined with MRI scans to treat alcohol use disorder. It aims to see if targeting specific brain connections can help reduce drinking.
Palo Alto, CaliforniaAges 25–75 - NCT06661538RecruitingPhase 2
Food referrals to help children with health conditions
This study tests a program that helps families with food insecurity get connected to food resources. It is for children ages 5–18 who are already seen at certain specialty clinics and who receive Medicaid or SNAP.
San Diego, CaliforniaAges 5 years+
Where these studies are running in California
Institutions with a site for the recruiting health studies listed above.
- Stanford University · 4 studies
- University of California, San Francisco · 2 studies
- Bay Area Community Health
- Bayview Research Group
- Baywell Health
- Bridge HIV, San Francisco Department of Public Health
- California Pacific Medical Center
- California Retina Consultants
What taking part in a health 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.
Common questions
- Are there health clinical trials in California?
- Yes. We're currently tracking 342 recruiting health 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 health 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 health 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 health 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.