California is currently home to 5602 active clinical trials, seeking participants for engagement in research studies. These trials take place at a variety of cities in the state, including Los Angeles, San Francisco, San Diego and Sacramento. Whether you're a healthy volunteer interested in paid medical research or someone seeking trials related to a specific condition, the state offers a diverse array of opportunities in your vicinity.
Triptorelin for the Prevention of Ovarian Damage in Adolescents and Young Adults With Cancer
Recruiting
This phase III trial compares the effect of giving triptorelin vs no triptorelin in preventing ovarian damage in adolescents and young adults (AYAs) with cancer receiving chemotherapy with an alkylating agents. Alkylating agents are part of standard chemotherapy, but may cause damage to the ovaries. If the ovaries are not working well or completely shut down, then it will be difficult or impossible to get pregnant in the future. Triptorelin works by blocking certain hormones and causing the ovar... Read More
Gender:
FEMALE
Ages:
39 years and below
Trial Updated:
08/08/2025
Locations: City of Hope Comprehensive Cancer Center, Duarte, California
Conditions: Hematopoietic and Lymphatic System Neoplasm, Malignant Solid Neoplasm
Study to Assess the Efficacy, Safety, and Tolerability of NOC-110 in Adults With Refractory or Unexplained Chronic Cough
Recruiting
This is a phase 2b, randomized, double-blind, placebo-controlled study investigating the efficacy, safety, and tolerability of Taplucainium Inhalation Powder (NOC-110) once daily in adults with refractory or unexplained chronic cough.
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
08/08/2025
Locations: Allergy and Asthma Associates of Southern California dba Southern California Research, Laguna Niguel, California
Conditions: Refractory or Unexplained Chronic Cough
Observation Study in Patients Age 0-5 Years With LAMA2-related Congenital Muscular Dystrophy
Recruiting
The goal of this observational study is to understand how young children with LAMA2-related dystrophy move and change over time. We will also learn about how this condition impacts other body systems. Participants will undergo: * Neuromuscular assessments * Blood collections * Swallowing and breathing assessments * Questionnaires
Gender:
ALL
Ages:
5 years and below
Trial Updated:
08/08/2025
Locations: University of California, Los Angeles, Los Angeles, California
Conditions: LAMA2-MD \(Merosin Deficient Congenital Muscular Dystrophy, MDC1A\)
A Study to Investigate the Effect on Lung Function of BDA Formulated With a New Propellant (HFO) Compared With an Approved Asthma Treatment (BDA With HFA Propellant) in Participants With Asthma
Recruiting
The purpose of this study is to assess the PD equivalence of the approved asthma combination therapy, BDA, delivered using the proposed replacement propellant HFO compared with BDA delivered using the currently approved propellant HFA in participants with asthma.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/08/2025
Locations: Research Site, Encinitas, California
Conditions: Asthma
A Study to Evaluate the Safety, Pharmacokinetics, and Activity of RO7759065 as a Single Agent and in Combination With Atezolizumab in Patients With Locally Advanced or Metastatic Solid Tumors
Recruiting
This is a first-in-human Phase Ia/Ib, open-label, multicenter, dose escalation and dose expansion study designed to evaluate the safety, tolerability, pharmacokinetics, pharmacodynamics, immunogenicity, and preliminary anti-tumor activity of RO7759065 as a single agent (Phase Ia) or in combination with atezolizumab (Phase Ib) in patients with locally advanced, recurrent, or metastatic incurable solid tumor malignancies. Several key aspects of the study design and study population are summarized... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/08/2025
Locations: City of Hope Comprehensive Cancer Center, Duarte, California
Conditions: Solid Tumour
Real-world Evaluation of the HistoSonics Edison System for Treatment of Liver Tumors Across Multidisciplinary Users (BOOMBOX: Master Study)
Recruiting
The goal of this observational study is to collect information on the use of the HistoSonics Edison System for the treatment of liver tumors. The main aim is to understand how different patient characteristics and procedural characteristics may affect histotripsy success at 36 hours post-histotripsy procedure. Sub-studies to the BOOMBOX: Master Study will investigate specific populations and/or clinical questions with more stringent enrollment criteria, standardized testing criteria, and/or foll... Read More
Gender:
ALL
Ages:
22 years and above
Trial Updated:
08/08/2025
Locations: Mission Hospital, Mission Viejo, California
Conditions: Liver Neoplasms, Primary Liver Cancer, Secondary Liver Cancer, Tumor Liver, Benign Liver Tumor
SpaceIT Hydrogel System for Perirectal Spacing
Recruiting
To evaluate the safety and effectiveness of the SpaceIT™ Hydrogel System in patients undergoing External Beam Radiotherapy (EBRT) for the treatment of prostate cancer.
Gender:
MALE
Ages:
18 years and above
Trial Updated:
08/08/2025
Locations: Ronald Reagan UCLA Medical Center, Los Angeles, California
Conditions: Prostate Cancer
A Study of Lower Radiotherapy Dose to Treat Children With CNS Germinoma
Recruiting
This phase II trial studies how well lower dose radiotherapy after chemotherapy (Carboplatin \& Etoposide) works in treating children with central nervous system (CNS) germinomas. Radiation therapy uses high energy x-rays, particles, or radioactive seeds to kill cancer cells and shrink tumors. Carboplatin is in a class of medications known as platinum-containing compounds. It works in a way similar to the anticancer drug cisplatin, but may be better tolerated than cisplatin. Carboplatin works by... Read More
Gender:
ALL
Ages:
Between 3 years and 29 years
Trial Updated:
08/08/2025
Locations: Loma Linda University Medical Center, Loma Linda, California
Conditions: Central Nervous System Germinoma, Diabetes Insipidus, Pineal Region Germinoma, Suprasellar Germinoma, Basal Ganglia Germinoma, Thalamic Germinoma
Psilocybin for Major Depressive Disorder (MDD)
Recruiting
Approximately 240 eligible adult participants (≥18 years old) who meet Diagnostic and Statistical Manual of Mental Disorders (DSM-5-TR) criteria for Major Depressive Disorder (MDD) will be enrolled. Participants will be randomly assigned to receive a single oral dose of Psilocybin 25 mg, Psilocybin 5 mg, or inactive placebo. The purpose of this study is to evaluate the efficacy, safety, and tolerability of Psilocybin 25 mg versus placebo in adults with MDD, as assessed by the difference between... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/08/2025
Locations: Kadima Neuropsychiatry Institute, La Jolla, California
Conditions: Depressive Disorder, Major
Observational Study of Oral Cariprazine Capsules to Assess Change in Disease Activity in Adult Participants With Bipolar I Disorder
Recruiting
Bipolar I disorder (BP-I) is a common, chronic, and disabling mental illness with significant morbidity and mortality defined by episodes of mania and depression (or symptoms of both at once, known as mixed features). This prospective, observational study will examine effectiveness, functioning and quality of life outcomes in adult patients with BP-I experiencing a major depressive episode (with or without mixed features) requiring treatment and initiating treatment with cariprazine. It will exa... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/08/2025
Locations: Bowman Medical Group /ID# 259989, Beverly Hills, California
Conditions: Bipolar I Disorder
A Study to Assess the Safety, Pharmacokinetics, and Efficacy of Intravenous (IV) ABBV-303, as Monotherapy and in Combination With IV Infused Budigalimab (ABBV-181), in Adults With Advanced Solid Tumors
Recruiting
Cancer is a condition where cells in a specific part of body grow and reproduce uncontrollably. The purpose of this study is to assess safety, tolerability, pharmacokinetics and preliminary efficacy of ABBV-303 as a monotherapy and in combination with budigalimab, (ABBV-181). ABBV-303 is an investigational drug being developed for the treatment of solid tumors. There are multiple treatment arms in this study. Participants will either receive ABBV-303 as a single agent or in combination with bud... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/08/2025
Locations: City of Hope /ID# 254303, Duarte, California
Conditions: Solid Tumors
A Safety Study of PF-08046045/SGN-35T in Adults With Advanced Cancers
Recruiting
This clinical trial is studying lymphoma. Lymphoma is a cancer that starts in the blood cells that fight infections. There are several types of lymphoma. This study will enroll people who have lymphoma, such as classical Hodgkin lymphoma, peripheral T-cell lymphoma including systemic anaplastic large cell lymphoma, diffuse large B-cell lymphoma, or some types of primary cutaneous lymphoma. This clinical trial uses a drug called PF-08046045/SGN-35T. The study drug is in testing and has not been... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/08/2025
Locations: Stanford Cancer Center / Blood and Marrow Transplant Program, Palo Alto, California
Conditions: Lymphoma, T-Cell, Cutaneous, Hodgkin Disease, Lymphoma, T-Cell, Peripheral, Lymphoma, Large-Cell, Anaplastic, Lymphoma, Large B-Cell, Diffuse, Lymphoma, Non-Hodgkin