Location · California
Clinical trials recruiting in California
1900 recruiting studies have at least one site in California; 700 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.
1,900 recruiting studiesSource: ClinicalTrials.gov, refreshed October 27, 2026How we list studies
More recruiting studies (pay not posted)
- RecruitingPhase 3
Study of the Efficacy and Safety of Inhaled Treprostinil in Subjects With Progressive Pulmonary Fibrosis (TETON-PPF)
United Therapeutics
- Location
- Los Angeles, CA + 73 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
Interventional Study of Infigratinib in Children < 3 Years Old With Achondroplasia (ACH)
QED Therapeutics, a BridgeBio company
- Location
- Oakland, CA + 2 other US sites
- Eligibility basics
- Ages 0 mo–2
- Recruiting
Evaluation of a Non-Implanted Electrical Stimulation Device for Overactive Bladder (OAB)
FemPulse Corporation
- Location
- Beverly Hills, CA + 11 other US sites
- Eligibility basics
- Ages 21+ · Women only
- RecruitingPhase 1/Phase 2
Safety, Tolerability and Exploratory Efficacy of EC5026 in Parkinson's Disease (STEP Study)
EicOsis Human Health Inc.
- Location
- Sacramento, CA
- Eligibility basics
- Ages 50–80
- RecruitingPhase 3
A Study to Learn About the Study Medicine Called Rimegepant in Women When Used for Intermittent Prevention of Menstrual Migraine
Pfizer
- Location
- Canoga Park, CA + 30 other US sites
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingPhase 2
A Phase 2 Study of CRD-4730 in CPVT
Cardurion Pharmaceuticals, Inc.
- Location
- San Francisco, CA + 4 other US sites
- Eligibility basics
- Ages 18–99
- RecruitingPhase 1/Phase 2
Study to Evaluate Safety, Efficacy and Immunogenicity of Acne mRNA Vaccine in Participants With Mild Acne
Sanofi Pasteur, a Sanofi Company
- Location
- Encino, CA + 3 other US sites
- Eligibility basics
- Ages 18–45
- RecruitingPhase 2
A Study of NTX-1472 in Social Anxiety Disorder
Newleos Therapeutics, Inc.
- Location
- Encino, CA + 9 other US sites
- Eligibility basics
- Ages 18–65
- RecruitingPhase 3
A Research Study Investigating How Well the Medicine NNC0487-0111 Helps People With Excess Body Weight and Knee Osteoarthritis Lose Weight and Reduce Pain
Novo Nordisk A/S
- Location
- Walnut Creek, CA + 18 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
A Study to Evaluate D-2570 in Participants With Moderate to Severe Plaque Psoriasis
InventisBio Co., Ltd
- Location
- Chula Vista, CA + 2 other US sites
- Eligibility basics
- Ages 18–70
- RecruitingPhase 2
A Study to Evaluate Etrasimod Treatment in Adolescents With Ulcerative Colitis
Pfizer
- Location
- Garden Grove, CA + 11 other US sites
- Eligibility basics
- Ages 12–17
- RecruitingPhase 1/Phase 2
A Study of SGT-003 Gene Therapy in Duchenne Muscular Dystrophy (INSPIRE DUCHENNE)
Solid Biosciences Inc.
- Location
- Los Angeles, CA + 11 other US sites
- Eligibility basics
- Ages 0 mo–17 · Men only
- RecruitingPhase 2
A Study of Efimosfermin Alfa in Participants With Biopsy-confirmed Cirrhosis (Compensated) Due to MASH
GlaxoSmithKline
- Location
- Fresno, CA + 24 other US sites
- Eligibility basics
- Ages 18–75
- Recruiting
NMT EasyFit Sensor and Cable
GE Healthcare
- Location
- Loma Linda, CA
- Eligibility basics
- Ages 18+
- RecruitingPhase 2/Phase 3
A Phase 2/3 Study of Brepocitinib in Adults With Lichen Planopilaris
Priovant Therapeutics, Inc.
- Location
- Irvine, CA + 44 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Trial to Evaluate the Efficacy and Safety of Tralokinumab in Combination With Topical Corticosteroids in Children and Infants With Moderate-to-severe Atopic Dermatitis
LEO Pharma
- Location
- Palo Alto, CA + 13 other US sites
- Eligibility basics
- Ages 6 mo–11
- RecruitingPhase 2
A Chronic Pain Master Protocol (CPMP): A Study of LY4065967 in Participants With Diabetic Peripheral Neuropathic Pain
Eli Lilly and Company
- Location
- Palm Springs, CA + 35 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study of Donanemab (LY3002813) in Participants Who Completed Study AACM (TRAILBLAZER-ALZ 3-EXT).
Eli Lilly and Company
- Location
- Huntington Beach, CA + 41 other US sites
- Eligibility basics
- Ages 55+
- RecruitingPhase 2
4D-710 in Adult Patients With Cystic Fibrosis
4D Molecular Therapeutics
- Location
- San Francisco, CA + 17 other US sites
- Eligibility basics
- Ages 18+
- Recruiting
Endurant Stent Graft System vs Excluder Endoprothesis: ADVANCE Trial
Medtronic Cardiovascular
- Location
- Loma Linda, CA + 27 other US sites
- Eligibility basics
- Ages 20+
- Recruiting
Reducing Fluid Overload in Heart Failure Patients Using a Non-invasive, Renal Independent System
AquaPass Medical Ltd.
- Location
- La Jolla, CA + 7 other US sites
- Eligibility basics
- Ages 21–79
- Recruiting
Moda-flx Hemodialysis System™ Under Professional Care Settings by Trained Individuals and At Home by Participants
Diality Inc.
- Location
- San Dimas, CA + 4 other US sites
- Eligibility basics
- Ages 18–80
- RecruitingPhase 2/Phase 3
Ataciguat for Slowing the Progression of Moderate Calcific Aortic Valve Stenosis: A Randomized, Placebo Controlled Study
Kardigan, Inc.
- Location
- Beverly Hills, CA + 46 other US sites
- Eligibility basics
- Ages 50+
- RecruitingPhase 1
A Study to Learn if Bimekizumab Given in Different Ways is Safe and Moves Similarly Throughout the Body Over Time in Adults
UCB Biopharma SRL
- Location
- Apple Valley, CA + 29 other US sites
- Eligibility basics
- Ages 18+