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
Phase 3 Extension Study to Evaluate Long-term Safety of Ianalumab in Participants With Systemic Lupus Erythematosus (SIRIUS-SLE Extension).
Novartis Pharmaceuticals
- Location
- Burbank, CA + 20 other US sites
- Eligibility basics
- Ages 12–100
- RecruitingPhase 2
Study of BB-031 in Acute Ischemic Stroke Patients (RAISE)
Basking Biosciences, Inc.
- Location
- Torrance, CA + 9 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Open-label Extension Study of Seralutinib in Adult Subjects With PAH (PROSERA-EXT)
Gossamer Bio USA, Inc.
- Location
- Fresno, CA + 28 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 3
A Study to Investigate the Pharmacokinetics and Safety of Dupilumab in Participants ≥6 Months to <18 Years of Age With Prurigo Nodularis
Sanofi
- Location
- Palo Alto, CA + 14 other US sites
- Eligibility basics
- Ages 6 mo–17
- RecruitingPhase 3
Study to Evaluate the Effect of Balcinrenone/Dapagliflozin in Patients With Heart Failure and Impaired Kidney Function
AstraZeneca
- Location
- Beverly Hills, CA + 93 other US sites
- Eligibility basics
- Ages 18–130
- RecruitingPhase 3
Evaluating the Efficacy and Safety of PT027 Compared With PT007 Administered As Needed in Participants 12 to < 18 Years of Age With Asthma
AstraZeneca
- Location
- Long Beach, CA + 70 other US sites
- Eligibility basics
- Ages 12–17
- RecruitingPhase 3
A Study Evaluating Efruxifermin in Subjects With Compensated Cirrhosis Due to NASH/MASH
Akero Therapeutics, Inc
- Location
- Coronado, CA + 130 other US sites
- Eligibility basics
- Ages 18–80
- RecruitingPhase 3
A Study Investigating Subcutaneously Administered Pozelimab in Combination With Cemdisiran or Cemdisiran Alone in Adult Participants With Geographic Atrophy
Regeneron Pharmaceuticals
- Location
- Beverly Hills, CA + 144 other US sites
- Eligibility basics
- Ages 50–85
- RecruitingPhase 2
ALTO-100 in Bipolar Disorder With Depression (BD-D)
Alto Neuroscience
- Location
- Chino, CA + 38 other US sites
- Eligibility basics
- Ages 18–70
- RecruitingPhase 3
Study With Omecamtiv Mecarbil (CK-1827452) to Treat Chronic Heart Failure With Severely Reduced Ejection Fraction
Cytokinetics
- Location
- Beverly Hills, CA + 80 other US sites
- Eligibility basics
- Ages 18–85
- Recruiting
Onyx™ Liquid Embolic IDE Clinical Study
Medtronic Endovascular
- Location
- Irvine, CA + 19 other US sites
- Eligibility basics
- Ages 22+
- RecruitingPhase 1
Study to Evaluate the Pharmacokinetics (PK), Safety and Tolerability up to 6 Years of Intravenous (i.v.) Secukinumab in Pediatric Participants With Juvenile Psoriatic Arthritis (JPsA).
Novartis Pharmaceuticals
- Location
- Loma Linda, CA + 10 other US sites
- Eligibility basics
- Ages 2–17
- RecruitingPhase 3
Safety and Efficacy of APC-0101 in Preterm Infants With Respiratory Distress Syndrome
Aerogen Pharma Limited
- Location
- La Jolla, CA + 17 other US sites
- Eligibility basics
- Any age listed
- Recruiting
Fluid Management of Acute Decompensated Heart Failure Subjects Treated With Reprieve System (FASTR-II) (IDE-G210258)
Reprieve Cardiovascular, Inc
- Location
- Irvine, CA + 33 other US sites
- Eligibility basics
- Ages 22+
- RecruitingPhase 2
A Study to Learn About the Study Medicine Called PF-07275315 in People With Moderate-To-Severe Asthma
Pfizer
- Location
- Lancaster, CA + 34 other US sites
- Eligibility basics
- Ages 18–75
- Recruiting
Randomized Study on Transoral Outlet Reduction and Lifestyle Changes for Weight Regain After Gastric Bypass
Boston Scientific Corporation
- Location
- Irvine, CA + 8 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Investigate Efficacy and Safety of Teplizumab Compared With Placebo in Participants 1 to 25 Years of Age With Stage 3 Type 1 Diabetes
Sanofi
- Location
- San Diego, CA + 33 other US sites
- Eligibility basics
- Ages 1–25
- RecruitingPhase 3
Long-Term Safety Study of Deucravacitinib Versus Ustekinumab in Participants With Psoriasis (PRAGMATYK)
Bristol-Myers Squibb
- Location
- Encinitas, CA + 90 other US sites
- Eligibility basics
- Ages 40+
- Recruiting
The ArtixASCEND Study
Inari Medical
- Location
- San Francisco, CA + 22 other US sites
- Eligibility basics
- Ages 18+
- Recruiting
The Use of p48/64 MW HPC Flow Modulation Device in the Treatment of Wide-necked Intracranial Aneurysms
phenox Inc.
- Location
- Los Angeles, CA + 24 other US sites
- Eligibility basics
- Ages 18+
- Recruiting
EVERO Drug-coated Balloon (DCB) Randomized Trial
Cook Research Incorporated
- Location
- Long Beach, CA + 11 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
SAFety and Efficacy of Human Anti-thymocyte ImmunoGlobUlin SAB-142 ARresting Progression of Type 1 Diabetes
SAb Biotherapeutics, Inc.
- Location
- San Francisco, CA + 20 other US sites
- Eligibility basics
- Ages 5–40
- RecruitingPhase 1
A Clinical Study of Letermovir (MK-8228) in Children and Adolescents Who Receive a Kidney Transplant (KT) (MK-8228-077)
Merck Sharp & Dohme LLC
- Location
- Los Angeles, CA + 20 other US sites
- Eligibility basics
- Up to age 17
- RecruitingPhase 2
A Study to Learn About Study Medicine Called PF-08049820 in People With Eczema
Pfizer
- Location
- Huntington Beach, CA + 13 other US sites
- Eligibility basics
- Ages 18–64