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
A Study of Zasocitinib in Adults With Psoriatic Arthritis Who Have Not Taken Biologic Medicines
Takeda
- Location
- Fountain Valley, CA + 45 other US sites
- Eligibility basics
- Ages 18+
- Recruiting
A Clinical Trial Comparing 2x/Day for 30-minutes Use of the Emanate Perio PODS Post-SRP to a Control Group Post-SRP.
McGuire Institute
- Location
- Fullerton, CA + 7 other US sites
- Eligibility basics
- Ages 30–75
- RecruitingPhase 3
A Study to Learn About the Effects of Felzartamab Infusions on Adults With Immunoglobulin A Nephropathy (IgAN)
Biogen
- Location
- Apple Valley, CA + 23 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Test Whether Vicadrostat (BI 690517) in Combination With Empagliflozin Helps People With Heart Failure and a Weak Pumping Function of the Left Side of the Heart
Boehringer Ingelheim
- Location
- Covina, CA + 78 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Learn About the Study Medicine Ibuzatrelvir in Adults With COVID-19 Who Are Severely Immunocompromised
Pfizer
- Location
- Canoga Park, CA + 68 other US sites
- Eligibility basics
- Ages 18+
- 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+