Clinical trials · California
Multiple sclerosis clinical trials in California
We’re tracking 33 recruiting multiple sclerosis studies with a site in California — including Early Phase 1, Phase 1, Phase 1/Phase 2, Phase 2, Phase 3 and Phase 4 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT07067463RecruitingPhase 3
Testing orelabrutinib for primary progressive MS
This trial tests a daily pill called orelabrutinib to see if it can slow disability progression in people with primary progressive multiple sclerosis (PPMS). It may be an option for patients whose symptoms have been getting worse over the past two years.
West Hollywood, CaliforniaAges 18–60 - NCT07325292RecruitingPhase 3
Frexalimab injection vs IV for multiple sclerosis
This study tests if a new injection (frexalimab) works as well as the IV version for people with relapsing or certain types of secondary progressive multiple sclerosis. It could offer a more convenient way to receive this treatment at home.
West Hollywood, CaliforniaAges 18–60 - NCT05704361RecruitingPhase 1
Study of an experimental drug for multiple sclerosis
This study tests an experimental drug called RO7121932 in people with multiple sclerosis. The goal is to see how safe it is and how the body processes it. It might help by offering a new way to manage the condition.
Stanford, CaliforniaAges 18–65 - NCT06433752Recruiting
Study of BRIUMVI for relapsing multiple sclerosis
This study looks at how well BRIUMVI (a medicine for relapsing multiple sclerosis) works for people in everyday life. Researchers want to see how people do when they first start the medication.
Fresno, CaliforniaAges 18 years+ - NCT04047628RecruitingPhase 3
MS patients with active relapsing disease comparing two treatment plans
This Phase 3 study compares the best standard MS treatment (chosen by your doctors) versus an approach called autologous hematopoietic stem cell transplant (AHSCT) for people with highly active, treatment-resistant relapsing multiple sclerosis. It aims to see which option controls MS disease activity better and keeps you safer over time.
Palo Alto, CaliforniaAges 18–55 - NCT04390009RecruitingEarly Phase 1
Whole-body PET scans in people with multiple sclerosis
This early study tests how whole-body PET-CT scans can be used in people with multiple sclerosis (and compares with healthy volunteers). It may help researchers understand what the scan can show in MS throughout the body.
Ladera Ranch, CaliforniaAges 25–55 - NCT05204459Recruiting
MRI and eye-scan study for MS and related conditions
This trial uses brain MRI and eye imaging tests to study research markers in people with multiple sclerosis (MS) and related neurologic conditions. It may help researchers better understand these diseases and how they change over time.
Los Angeles, CaliforniaAges 18 years+ - NCT06138132RecruitingPhase 1
CAR-T cell therapy for progressive multiple sclerosis
This trial is testing a type of immunotherapy called CAR-T cells (made from your own immune cells) to see if it can help slow or stop progressive multiple sclerosis. It is a very early safety study, so only people with progressive MS who meet strict health criteria can join.
Palo Alto, CaliforniaAges 18–65 - NCT06408259RecruitingPhase 3
Comparing ozanimod and fingolimod for children with MS
This study compares two oral medications, ozanimod and fingolimod, to see which one works better and is safer for children and teenagers with relapsing-remitting MS. Both drugs help reduce MS attacks and slow down the disease.
Loma Linda, CaliforniaAges 10–17 - NCT06515782Recruiting
Fasting-mimicking diet for multiple sclerosis
This study tests whether a special low-calorie diet that mimics fasting can help people with multiple sclerosis feel better and reduce inflammation. Over several months, participants will follow this diet in cycles and be monitored with MRI scans and blood tests.
Los Angeles, CaliforniaAges 18–55 - NCT07222618Recruiting
Selfie videos to measure function in MS
This trial asks people with MS to record short 'selfie' videos of themselves doing everyday tasks, like walking or getting dressed. The goal is to find a better, more personal way to measure how MS affects daily function.
San Francisco, CaliforniaAges 18 years+ - NCT05359653RecruitingPhase 1/Phase 2
Clemastine to study MRI changes in relapsing MS
This early-phase study tests whether clemastine (a drug being studied for “myelin repair”) changes how MS looks on special MRI scans. It may help researchers understand if the treatment supports restoring nerve covering in people with relapsing-remitting MS.
San Francisco, CaliforniaAges 18–55 - NCT07510607RecruitingPhase 2
Metabolic imaging study for multiple sclerosis
This study tests a new imaging method using a special substance called hyperpolarized 13C pyruvate to see how it can help understand multiple sclerosis. You may join if you have relapsing-remitting MS, have not used disease-modifying treatments in the past two years, and are planning to start anti-CD20 therapy.
San Francisco, CaliforniaAges 18 years+ - NCT06495593Enrolling by invitationPhase 4
Ocrelizumab's effect on immune cells in lymph nodes in MS
This study tests how ocrelizumab, a medication for MS, affects immune cells in your lymph nodes. It may help doctors understand how the drug works and why it helps some people more than others.
San Francisco, CaliforniaAges 18–65 - NCT06846281RecruitingPhase 3
Switching to remibrutinib from ocrelizumab for relapsing MS
This study tests a new oral medication called remibrutinib for people with relapsing MS who are currently on ocrelizumab. The goal is to see if switching to remibrutinib is safe and effective for controlling MS long-term.
Irvine, CaliforniaAges 40–70 - NCT07011914Recruiting
MS care study for young adults
This study looks at how to improve care for young adults with relapsing-remitting MS. It focuses on people who are Black, Hispanic, or have limited income.
San Francisco, CaliforniaAges 18 years+ - NCT07139743RecruitingPhase 1
Obe-cel for progressive multiple sclerosis that is getting worse
This study tests a new treatment called obe-cel, a type of CAR T-cell therapy, for people with progressive multiple sclerosis that hasn't responded to other treatments. It aims to see if this therapy can slow or stop the disease from getting worse.
Redwood City, CaliforniaAges 18–60 - NCT07299019RecruitingPhase 3
Study of orelabrutinib for secondary progressive MS
This study tests an oral medication called orelabrutinib for people whose multiple sclerosis has changed from relapsing-remitting to secondary progressive. The goal is to see if it can slow down disability worsening that happens even without relapses.
Fullerton, CaliforniaAges 18–60 - NCT07225504RecruitingPhase 3
Study of remibrutinib for secondary progressive multiple sclerosis
This trial tests an oral medication called remibrutinib to see if it can slow disability progression in people with secondary progressive multiple sclerosis (SPMS). You might join if you have had MS for a while, your symptoms have worsened over the past year, and you haven't had any recent relapses.
Fullerton, CaliforniaAges 18–65 - NCT07424027Recruiting
Central vein sign in multiple sclerosis extension study
This study is for people already in the CAVS-MS study. It uses MRI scans to look at a specific sign in the brain that may help diagnose multiple sclerosis.
Los Angeles, CaliforniaAges 18–65 - NCT06796504Recruiting
Nerve stimulation for relapsing-remitting multiple sclerosis
This trial tests a device that stimulates a nerve in the neck, which may help repair the protective coating around nerves in the brain and spinal cord. It is for people with relapsing-remitting MS who are stable on their current medication and have some vision problems due to MS.
Irvine, CaliforniaAges 22–60 - NCT06583395Enrolling by invitation
Meditation retreat study with fitness tracker
This trial studies people attending a 7-day meditation retreat to see how meditation affects well-being. You will wear a fitness tracker and answer surveys.
Palm Desert, CaliforniaAges 21 years+ - NCT05395624RecruitingPhase 1/Phase 2
Safety imaging study of a PET tracer in ALS, Alzheimer, MS, Parkinson
This early-phase study tests the safety of a radioactive tracer (“18F-OP-801”) and how the tracer moves through the body (biodistribution) in people with ALS, Alzheimer’s disease, multiple sclerosis, Parkinson’s disease, and in healthy volunteers. It also measures how the body processes the tracer (“pharmacokinetics”) to support future studies.
San Francisco, CaliforniaAges 18–80 - NCT05877963RecruitingPhase 3
Ublituximab treatment plan for relapsing multiple sclerosis
This Phase 3 trial tests the safety and effectiveness of a modified treatment plan using ublituximab for relapsing multiple sclerosis. It also studies how the drug behaves in the body and aims to improve disease control while monitoring side effects.
Orange, CaliforniaAges 18–65
Multiple sclerosis trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting multiple sclerosis studies listed above.
- Regina Berkovich MD, PhD Inc. · 4 studies
- Stanford University · 3 studies
- University of California, San Francisco · 3 studies
- Cedars-Sinai Medical Center · 2 studies
- Fullerton Neurology and Headache Center · 2 studies
- Stanford Multiple Sclerosis Center · 2 studies
- TG Therapeutics Investigational Trial Site · 2 studies
- Brain Health Alliance
What taking part in a multiple sclerosis 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.
Multiple sclerosis trials in other states
Common questions
- Are there multiple sclerosis clinical trials in California?
- Yes. We're currently tracking 33 recruiting multiple sclerosis 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 multiple sclerosis 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 multiple sclerosis 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 multiple sclerosis 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.