Location · California
Clinical trials recruiting in California
1898 recruiting studies have at least one site in California; 701 accept healthy volunteers. Studies that need a specific condition are included too, so check each listing.
Want the research companies that run paid Phase 1 studies for healthy volunteers? Paid clinical trial companies in California.
1,898 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
More recruiting studies (pay not posted)
- RecruitingPhase 3
Study to Evaluate Sepofarsen in Subjects With Leber Congenital Amaurosis (LCA) Type 10 (HYPERION)
Laboratoires Thea
- Location
- San Francisco, CA + 3 other US sites
- Eligibility basics
- Ages 6+
- RecruitingPhase 3
Efficacy and Safety of VER-01 in the Treatment of Participants With Chronic Painful Lumbosacral Radiculopathy
Vertanical GmbH
- Location
- Long Beach, CA + 22 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study of JNT-517 in Participants With Phenylketonuria (PKU)
Otsuka Pharmaceutical Development & Commercialization, Inc.
- Location
- Los Angeles, CA + 9 other US sites
- Eligibility basics
- Ages 4+
- RecruitingPhase 2/Phase 3
A Study of Brepocitinib in Adults With Cutaneous Sarcoidosis
Priovant Therapeutics, Inc.
- Location
- San Francisco, CA + 34 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 1
Safety and Preliminary Efficacy of ULSC in Facioscapulohumeral Muscular Dystrophy (FSHD)
Restem, LLC.
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 15+
- RecruitingPhase 2
A Study to Assess the Effects of Zigakibart on IgA Nephropathy.
Novartis Pharmaceuticals
- Location
- San Francisco, CA + 4 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
Safety in Adult Participants With Atrial Fibrillation Who Are Treated With Anticoagulation
Regeneron Pharmaceuticals
- Location
- Covina, CA + 41 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
An Induction Study to Investigate the Efficacy and Safety of Duvakitug in Participants With Moderately to Severely Active Crohn's Disease
Sanofi
- Location
- Canoga Park, CA + 126 other US sites
- Eligibility basics
- Ages 16–80
- RecruitingPhase 3
CLEOPATTRA: A Research Study to Look at the Effects of Treatment With a Medicine Called Coramitug (NNC6019-0001) in People With Heart Failure Due to Transthyretin Amyloid (ATTR) Amyloidosis
Novo Nordisk A/S
- Location
- La Jolla, CA + 58 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
A Study of S-337395 in Symptomatic Nonhospitalized Adults With Respiratory Syncytial Virus (RSV) Who Are at High Risk of Progression to Severe Disease
Shionogi
- Location
- Los Angeles, CA + 35 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Sarilumab Efficacy and Safety in Adults With Early Polymyalgia Rheumatica
Sanofi
- Location
- Covina, CA + 46 other US sites
- Eligibility basics
- Ages 50+
- RecruitingPhase 3
A Study of Orelabrutinib in Patients With Secondary Progressive Multiple Sclerosis
Zenas BioPharma (USA), LLC
- Location
- Fullerton, CA + 24 other US sites
- Eligibility basics
- Ages 18–60
- RecruitingPhase 3
INTREPID: A Study of Sapablursen Evaluating the Safety and Efficacy in Participants With Polycythemia Vera (PV)
Ono Pharmaceutical Co., Ltd.
- Location
- Orange, CA + 11 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Study Evaluating the Efficacy and Safety of RAP-219 in Adult Participants With Focal Seizures FOCUS-1
Rapport Therapeutics Inc.
- Location
- Palmdale, CA + 13 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 3
A Phase 3 Study of Rezpegaldesleukin (NKTR-358) for Patients ≥ 12 Years of Age With Moderate-to-Severe Atopic Dermatitis
Nektar Therapeutics
- Location
- Fountain Valley, CA + 18 other US sites
- Eligibility basics
- Ages 12+
- RecruitingPhase 2
A Trial to Investigate PALI-2108 Versus Placebo in Participants With Moderately to Severely Active Ulcerative Colitis
Palisade Bio
- Location
- San Diego, CA + 27 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 2/Phase 3
A Study Investigating Oral Ozanimod (RPC1063) in Pediatric Participants With Moderate to Severe Active Ulcerative Colitis
Bristol-Myers Squibb
- Location
- Loma Linda, CA + 11 other US sites
- Eligibility basics
- Ages 2–17
- RecruitingPhase 2
Rhu-pGSN for Acute Respiratory Distress Syndrome (ARDS)
BioAegis Therapeutics Inc.
- Location
- Los Angeles, CA + 9 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Assess Adverse Events, Change in Disease Activity, and How Intravenous and Subcutaneous Risankizumab Moves Through the Body of Pediatric Participants With Moderately to Severely Active Crohn's Disease
AbbVie
- Location
- Oakland, CA + 9 other US sites
- Eligibility basics
- Ages 2–17
- RecruitingPhase 3
Lumason® Infusion vs. Bolus Administrations
Bracco Diagnostics, Inc
- Location
- West Hills, CA + 3 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 4
A Study of Vedolizumab in Adults With Ulcerative Colitis (UC) or Crohn's Disease (CD) in the Community Setting
Takeda
- Location
- Escondido, CA + 77 other US sites
- Eligibility basics
- Ages 18–80
- RecruitingPhase 3
A Clinical Study of Molnupiravir to Prevent Severe Illness From Coronavirus Disease 2019 (COVID-19) in People Who Are High Risk (MK-4482-023)
Merck Sharp & Dohme LLC
- Location
- Castroville, CA + 54 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study of 2 Doses of Ritlecitinib in People 12 Years of Age and Older With Alopecia Areata
Pfizer
- Location
- Brea, CA + 28 other US sites
- Eligibility basics
- Ages 12+
- Recruiting
SPYRAL GEMINI Pilot Study
Medtronic Vascular
- Location
- Stanford, CA + 11 other US sites
- Eligibility basics
- Ages 18–80