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
EASi-PROTKT™ - A Study to Test Vicadrostat (BI 690517) Taken Together With Empagliflozin in People With Type 2 Diabetes, High Blood Pressure, and Cardiovascular Disease
Boehringer Ingelheim
- Location
- Beverly Hills, CA + 199 other US sites
- Eligibility basics
- Ages 18+
- Recruiting
A Multi Center Study Testing a New Implant for Adults With Severe Emphysema
Pulmair Medical, Inc.
- Location
- San Francisco, CA + 3 other US sites
- Eligibility basics
- Ages 22+
- RecruitingPhase 3
OPI-NXYDLD-303 Safety and Efficacy of Phentolamine Ophthalmic Solution in Keratorefractive Surgery Participants With Decreased Mesopic Visual Acuity
Opus Genetics, Inc
- Location
- Glendale, CA + 19 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
Brivekimig for the Treatment of Moderate to Severe Hidradenitis Suppurativa
Sanofi
- Location
- Northridge, CA + 16 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Find Out if BI 764198 Helps Adults and Adolescents With a Kidney Condition Called Focal Segmental Glomerulosclerosis (FSGS)
Boehringer Ingelheim
- Location
- Fremont, CA + 55 other US sites
- Eligibility basics
- Ages 12+
- RecruitingPhase 3
A Gaucher Disease Gene Therapy Trial With FLT201
Spur Therapeutics
- Location
- Los Angeles, CA + 12 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Phase 3 Study to Evaluate the Safety and Efficacy L606 in Participants With PH-ILD
Liquidia Technologies, Inc.
- Location
- Los Angeles, CA + 12 other US sites
- Eligibility basics
- Ages 18–80
- RecruitingPhase 2
A Study to Test Whether BI 3802876 is Tolerated in People With Compensated Liver Cirrhosis Due to Metabolic Dysfunction- Associated Steatohepatitis (MASH)
Boehringer Ingelheim
- Location
- Coronado, CA + 18 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 2
A Study to Test Whether Different Doses of BI 3000202 Help People With Systemic Lupus Erythematosus (SLE)
Boehringer Ingelheim
- Location
- La Palma, CA + 15 other US sites
- Eligibility basics
- Ages 18–74
- RecruitingPhase 3
Stroke and Systemic Embolism Prevention in Adult Participants With Atrial Fibrillation for Whom Oral Anticoagulation is Unsuitable
Regeneron Pharmaceuticals
- Location
- Fremont, CA + 42 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Test Whether Nerandomilast Helps People With Systemic Sclerosis
Boehringer Ingelheim
- Location
- San Diego, CA + 10 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 1/Phase 2
A Study in People With Diabetic Macular Edema to Test How Well Different Doses of BI 3812465 Are Tolerated
Boehringer Ingelheim
- Location
- Arcadia, CA + 24 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study of JNJ-78934804 in Participants With Moderately to Severely Active Crohn's Disease
Janssen Research & Development, LLC
- Location
- Anaheim, CA + 21 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 4
A Study to Learn About the Safety of Taking an Additional Dose of the Medicine Rimegepant in Adults With Migraine
Pfizer
- Location
- Canoga Park, CA + 16 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
A Study to Evaluate the Effectiveness of DT-101 as an Adjunctive Treatment in Patients With Depression
Draig Therapeutics Ltd
- Location
- Bellflower, CA + 19 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 3
A Study to Evaluate Efficacy, Safety, and Immunogenicity With ABP 938 8 mg Versus EYLEA® HD (Aflibercept) in Participants With Neovascular Age-related Macular Degeneration
Amgen
- Location
- Fullerton, CA + 54 other US sites
- Eligibility basics
- Ages 50+
- RecruitingPhase 3
A Study to Learn About the Study Medicine Called Rimegepant in Adults When Used for the Prevention of Chronic Migraine
Pfizer
- Location
- Canoga Park, CA + 15 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Test Whether Survodutide Helps People With Type 2 Diabetes Control Their Blood Sugar
Boehringer Ingelheim
- Location
- Concord, CA + 56 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Learn About Revaccination With a Vaccine Called RSVpreF in Immunocompromised Adults
Pfizer
- Location
- Los Angeles, CA + 12 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Assess the Efficacy and Safety of GSK5784283 (Felcorekibart) in Participants With Chronic Rhinosinusitis With Nasal Polyps (CRSwNP)
GlaxoSmithKline
- Location
- Los Angeles, CA + 1 other US site
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Assess the Efficacy and Safety of Elismetrep (K-304) in the Acute Treatment of Migraine
Kallyope Inc.
- Location
- Canoga Park, CA + 35 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 3
A Study of MACI in Patients Aged 10 to 17 Years With Symptomatic Chondral or Osteochondral Defects of the Knee
Vericel Corporation
- Location
- Palo Alto, CA + 10 other US sites
- Eligibility basics
- Ages 10–17
- RecruitingPhase 3
Safety and Efficacy Study of Contezolid Acefosamil and Contezolid Compared to Linezolid Administered Intravenously and Orally to Adults With Moderate or Severe Diabetic Foot Infections (DFI)
MicuRx
- Location
- Corona, CA + 1 other US site
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Investigate the Efficacy and Safety of Tezepelumab Compared With Placebo in Children 5 to < 12 Years Old With Severe Asthma
AstraZeneca
- Location
- Long Beach, CA + 18 other US sites
- Eligibility basics
- Ages 5–11