441 matching studies

Study is registered in ResearchMatch
Sponsor Condition of Interest
The Osteoarthritis Prevention Study
Wake Forest University Osteoarthritis, Knee
The goal of this study is to establish the efficacy of an intervention of dietary weight loss, exercise, and weight-loss maintenance for knee Osteoarthritis (OA) prevention in adult females aged ≥ 50 years with obesity and no or infrequent knee pain. The primary aim is to compare the effects of a d1 expand

The goal of this study is to establish the efficacy of an intervention of dietary weight loss, exercise, and weight-loss maintenance for knee Osteoarthritis (OA) prevention in adult females aged ≥ 50 years with obesity and no or infrequent knee pain. The primary aim is to compare the effects of a dietary weight loss, exercise, and weight-loss maintenance to an attention control group in preventing the development of structural Magnetic Resonance Imaging (MRI) knee OA. Secondary aims will determine the intervention effects on pain, mobility, health-related quality of life, knee joint compressive forces, inflammatory measures, weight loss, exercise self-efficacy, and cost-effectiveness of this intervention.

Type: Interventional

Start Date: Mar 2024

open study

Pain Alleviation With Testosterone in Opioid-Induced Hypogonadism
Brigham and Women's Hospital Opioid Use Pain Hypogonadism, Male
The aim of this trial is to evaluate whether testosterone replacement results in greater improvement in pain perception, pain tolerance, sexual function, fatigue, and quality of life when compared with placebo in men with chronic spinal pain treated with opioids who have opioid-induced hypogonadism1 expand

The aim of this trial is to evaluate whether testosterone replacement results in greater improvement in pain perception, pain tolerance, sexual function, fatigue, and quality of life when compared with placebo in men with chronic spinal pain treated with opioids who have opioid-induced hypogonadism (low testosterone).

Type: Interventional

Start Date: Jan 2022

open study

Randomized Double-Blind Placebo-Controlled Trial EValuating Baricitinib on PERSistent NEurologic an1
Wes Ely Long COVID Sars-CoV-2 Infection Coronavirus Infections COVID-19
The overarching goal of this study is to determine if baricitinib, as compared to placebo, will improve neurocognitive function, along with measures of physical function, quality of life, post-exertional malaise, effect of breathlessness on daily activities, post-COVID-19 symptom burden, and biomar1 expand

The overarching goal of this study is to determine if baricitinib, as compared to placebo, will improve neurocognitive function, along with measures of physical function, quality of life, post-exertional malaise, effect of breathlessness on daily activities, post-COVID-19 symptom burden, and biomarkers of inflammation and viral measures, in participants with Long COVID.

Type: Interventional

Start Date: Oct 2024

open study

LIFT: Life Improvement Trial
Brigham and Women's Hospital ME/CFS Long COVID PASC
The LIFT will be conducted at Brigham and Women's Hospital (BWH) of Harvard Medical School, focusing on the effect of Pyridostigmine (Mestinon) and Low-Dose Naltrexone (LDN) in subjects aged 18-70 meeting the Canadian consensus criteria (CCC) for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (1 expand

The LIFT will be conducted at Brigham and Women's Hospital (BWH) of Harvard Medical School, focusing on the effect of Pyridostigmine (Mestinon) and Low-Dose Naltrexone (LDN) in subjects aged 18-70 meeting the Canadian consensus criteria (CCC) for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) as well as having specifically Orthostatic Intolerance (OI). Long COVID (LC) subjects will also be included if they meet CCC and have OI. This double-blind, placebo-controlled study will involve 160 participants randomized into one of four possible groups: Pyridostigmine/LDN (40), Pyridostigmine/Placebo (40), LDN/Placebo (40), Placebo/Placebo (40). The dose of Pyridostigmine will be carefully titrated from 30mg to 60mg three times a day, and the dose of LDN will be titrated from 1.5 mg to 4.5 mg once daily. The trial includes a scale-back plan, allowing participants to reduce their dosage if they experience intolerance symptoms, with adjustments made during weekly visits. This plan provides a personalized approach to medication tolerance, ensuring participant's safety and comfort throughout the trial. The time commitment for the participant is approximately three (3) months, and during this time, there will be three (3) in-person visits to BWH and four (4) virtual visits. Study procedures will include two (2) submaximum cardiopulmonary exercise tests, questionnaires (virtually completed), and blood and urine collection. We will be recruiting from the BWH Dyspnea Clinic as well as the Open Medicine Foundation (OMF) StudyME Registry and anticipate the entire trial will take two (2) years to complete. The LIFT represents a significant endeavor to improve treatment options for ME/CFS patients and contribute to the broader understanding of this debilitating condition.

Type: Interventional

Start Date: Sep 2024

open study

Treat-to-Target Serum Urate Versus Treat-to-Avoid Symptoms in Gout
Massachusetts General Hospital Gout
The TRUST study is a randomized, controlled multicenter study to evaluate the management of gout by comparing two commonly used treatment strategies for gout (TTT vs TTASx) to determine the most beneficial for a patient-centered gout outcomes, as well as relevant cardiovascular-metabolic-renal endp1 expand

The TRUST study is a randomized, controlled multicenter study to evaluate the management of gout by comparing two commonly used treatment strategies for gout (TTT vs TTASx) to determine the most beneficial for a patient-centered gout outcomes, as well as relevant cardiovascular-metabolic-renal endpoints.

Type: Interventional

Start Date: Feb 2024

open study

A Study to Evaluate Avacopan in Participants With ANCA-associated Vasculitis
Amgen Antineutrophil Cytoplasmic Antibody-associated Vasculitis
The primary objective of this study is to evaluate the long-term safety of avacopan in participants with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). expand

The primary objective of this study is to evaluate the long-term safety of avacopan in participants with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV).

Type: Interventional

Start Date: Feb 2024

open study

Testosterone Replacement in Male Cancer Survivors With Fatigue and Low Testosterone
Seattle Institute for Biomedical and Clinical Research Hypogonadism, Male Fatigue Syndrome, Chronic
The overall goal of this study is to evaluate the effect of a testosterone drug called Depo-Testosterone (or 'testosterone cypionate'), an FDA-approved drug for improving fatigue, sexual function, quality of life, body composition, muscle strength, and physical activity in young cancer survivors wh1 expand

The overall goal of this study is to evaluate the effect of a testosterone drug called Depo-Testosterone (or 'testosterone cypionate'), an FDA-approved drug for improving fatigue, sexual function, quality of life, body composition, muscle strength, and physical activity in young cancer survivors who report fatigue and have low testosterone. Main hypothesis is that Testosterone administration in young male cancer survivors who are in remission for at least 1 year, report cancer-related fatigue and have symptomatic testosterone deficiency will be associated with greater improvements in fatigue scores compared with placebo.

Type: Interventional

Start Date: Mar 2021

open study

Dietary Intervention to Mitigate Adverse Consequences of Night Work
Brigham and Women's Hospital Dietary Habits
The goal of this clinical trial is to test whether our dietary intervention can prevent or lessen the negative health effects of night shift work in healthy participants. Participants will: - complete 2 inpatient stays - be provided with identical meals - have frequent blood draws -1 expand

The goal of this clinical trial is to test whether our dietary intervention can prevent or lessen the negative health effects of night shift work in healthy participants. Participants will: - complete 2 inpatient stays - be provided with identical meals - have frequent blood draws - provide urine, saliva, stool and rectal swab samples

Type: Interventional

Start Date: Mar 2023

open study

Apple Health Study
Apple Inc. Mental Health Sleep Exercise Hormones Metabolic Health
The Apple Health Study aims to build a diverse and inclusive group of participants to help researchers advance our understanding of how signals and information collected from apps and devices relate to health and may be used to predict, detect, monitor, and manage changes in health. To enroll, US1 expand

The Apple Health Study aims to build a diverse and inclusive group of participants to help researchers advance our understanding of how signals and information collected from apps and devices relate to health and may be used to predict, detect, monitor, and manage changes in health. To enroll, US residents who have an iPhone can download the Apple Research app from the App Store and go through the introduction and informed consent for the Apple Health Study. This study is fully remote, and all are invited to enroll if the eligibility criteria are met. Participants will be asked to complete tasks and surveys, using their iPhone and Apple Research app which include: - Selecting the types of data they would like to share with the study such as health and sensor data - Completing tasks and surveys including areas such as personal demographic information, personal medical history, family history, and social determinants of health

Type: Observational [Patient Registry]

Start Date: Feb 2025

open study

The Rhythm Evaluation for AntiCoagulaTion With Continuous Monitoring of Atrial Fibrillation
Johns Hopkins University Atrial Fibrillation
REACT-AF is a multicenter prospective, randomized, open-label, blinded endpoint (PROBE design), controlled trial comparing the current Standard Of Care (SOC) of continuous Direct Oral Anticoagulation (DOAC) use versus time-delimited (1 month) DOAC guided by an AF-sensing Smart Watch (AFSW) in parti1 expand

REACT-AF is a multicenter prospective, randomized, open-label, blinded endpoint (PROBE design), controlled trial comparing the current Standard Of Care (SOC) of continuous Direct Oral Anticoagulation (DOAC) use versus time-delimited (1 month) DOAC guided by an AF-sensing Smart Watch (AFSW) in participants with a history of paroxysmal or persistent Atrial Fibrillation (AF) and low-to-moderate stroke risk.

Type: Interventional

Start Date: Jul 2023

open study

Subclinical Primary Aldosteronism in Diabetes At-Risk for Kidney Disease
Brigham and Women's Hospital Type 2 Diabetes Chronic Kidney Diseases
The aim of this protocol is to assess the presence and severity of primary aldosteronism pathophysiology in patients with type 2 diabetes who have, or are at-risk for developing, chronic kidney disease. expand

The aim of this protocol is to assess the presence and severity of primary aldosteronism pathophysiology in patients with type 2 diabetes who have, or are at-risk for developing, chronic kidney disease.

Type: Interventional

Start Date: May 2024

open study

PREventing Pain After Surgery
Brigham and Women's Hospital Pain, Back Spinal Stenosis Disc Herniation Spondylosis Spondylolisthesis
The present study aims to adapt and modify a brief presurgical Acceptance and Commitment Therapy (ACT) intervention aimed at preventing the transition to Chronic Post-Surgical Pain (CPSP) and reducing long-term opioid use. Investigators will then assess the acceptability, feasibility, and prelimina1 expand

The present study aims to adapt and modify a brief presurgical Acceptance and Commitment Therapy (ACT) intervention aimed at preventing the transition to Chronic Post-Surgical Pain (CPSP) and reducing long-term opioid use. Investigators will then assess the acceptability, feasibility, and preliminary efficacy of the finalized intervention to prevent the transition to CPSP and reduce post-surgical opioid use six months following lumbar spine surgery. Finally, investigators will identify psychosocial and psychophysical phenotypes associated with response to this intervention.

Type: Interventional

Start Date: Jan 2023

open study

Cocoa Extract for Migraine Trial
Brigham and Women's Hospital Migraine
The goal of this clinical trial is to assess the feasibility of recruitment and adherence to a high-dose cocoa extract supplement in individuals diagnosed with episodic migraine. The main questions it aims to answer are: - Will we be able to enroll 114 participants during the recruitment period1 expand

The goal of this clinical trial is to assess the feasibility of recruitment and adherence to a high-dose cocoa extract supplement in individuals diagnosed with episodic migraine. The main questions it aims to answer are: - Will we be able to enroll 114 participants during the recruitment period? - Will participants take study pills daily during the pill-taking period? Researchers will compare two doses of cocoa extract to placebo to determine the acceptability of higher doses of cocoa extract supplementation in this patient population. Participants will be asked to: - Provide two urine samples - Complete daily questionnaires - Take four study pills a day for 12 weeks

Type: Interventional

Start Date: Jun 2025

open study

Anti-Inflammatory Treatment of Uremic Cardiomyopathy With Colchicine
Brigham and Women's Hospital Chronic Kidney Diseases
This study is designed to determine the efficacy and safety of colchicine in patients with chronic kidney disease. expand

This study is designed to determine the efficacy and safety of colchicine in patients with chronic kidney disease.

Type: Interventional

Start Date: Nov 2021

open study

A Study of Eloralintide (LY3841136) in Participants With Persistent Obesity Who Are Treated With a1
Eli Lilly and Company Overweight Obesity
The main purpose of this study is to evaluate the efficacy and safety of eloralintide compared with placebo in participants with persistent obesity or overweight, with or without type 2 diabetes, and on stable incretin background therapy. Participation in the study will last about 80 weeks. expand

The main purpose of this study is to evaluate the efficacy and safety of eloralintide compared with placebo in participants with persistent obesity or overweight, with or without type 2 diabetes, and on stable incretin background therapy. Participation in the study will last about 80 weeks.

Type: Interventional

Start Date: Feb 2026

open study

A Study to Test Whether Nerandomilast Can Help Slow Down Changes in the Lung in People With a Famil1
Boehringer Ingelheim Familial Pulmonary Fibrosis Interstitial Lung Abnormalities Interstitial Lung Diseases
This study is open to people aged 40 years or older who have at least 1 family member with pulmonary fibrosis. Pulmonary fibrosis is a condition where lung tissue becomes scarred, making it harder to breathe. People can join if a lung scan shows early changes in the lung, called interstitial lung a1 expand

This study is open to people aged 40 years or older who have at least 1 family member with pulmonary fibrosis. Pulmonary fibrosis is a condition where lung tissue becomes scarred, making it harder to breathe. People can join if a lung scan shows early changes in the lung, called interstitial lung abnormalities, which may lead to lung scarring. People with family members who have pulmonary fibrosis are more likely to develop it themselves. That is why it is important to check early for lung changes and find ways to prevent the condition from getting worse. The purpose of this study is to find out whether a medicine called nerandomilast can help slow down changes in the lung in people with a family history of pulmonary fibrosis. Participants are put into one of 2 groups randomly, which means the group is chosen by chance. One group takes nerandomilast tablets, and the other group takes placebo tablets. Placebo tablets look like nerandomilast tablets but do not contain any medicine. Participants take a tablet twice a day for about 2 to 3 years. There is a 3 out of 5 chance that participants will receive nerandomilast instead of the placebo. Participants are in the study for about 2 to 3 years. Participants visit the study site multiple times: more frequently during the first 2 years (about every 3 months), and then every 6 months thereafter. In the 3rd year, participants also have phone calls with the site staff every 3 months. Doctors regularly test lung function and take chest scans to see if the treatment works. The results are compared between the 2 groups to see if nerandomilast helps. The doctors also check participants' health and take note of any unwanted effects.

Type: Interventional

Start Date: Feb 2026

open study

A Study to Test Whether Nerandomilast Helps People With Lungfibrosis Related to Rheumatic Diseases
Boehringer Ingelheim Interstitial Lung Diseases Systemic Autoimmune Rheumatic Diseases Associated Interstitial Lung Diseases
Adults 18 years of age and older or above legal age with lung fibrosis related to systemic autoimmune rheumatic disease can participate in this study. People can only take part if they show no improvement in lung function after standard treatment with immunosuppressant medicine. The main purpose of1 expand

Adults 18 years of age and older or above legal age with lung fibrosis related to systemic autoimmune rheumatic disease can participate in this study. People can only take part if they show no improvement in lung function after standard treatment with immunosuppressant medicine. The main purpose of this study is to find out how a medicine called nerandomilast affects the lungs in people with systemic autoimmune rheumatic disease. Participants are put into 2 groups randomly, which means by chance. One group takes nerandomilast tablets and the other group takes placebo tablets. Placebo tablets look like nerandomilast tablets but do not contain any medicine. Participants take a tablet 2 times a day for at least 26 weeks and up to 1 year. Participants continue immunosuppressant treatment for their underlying rheumatic disease. Participants are in the study for about 7.5 to 13 months depending on when they join the study. During this time, they visit the study site about 9 to 10 times. At study visits, participants have lung function tests. At select visits, chest imaging is performed. Participants fill in questionnaires about their symptoms and quality of life. The results between the 2 groups are compared to see whether the treatment works. The doctors also regularly check participants' health and take note of any unwanted effects.

Type: Interventional

Start Date: Sep 2025

open study

Evaluating the Addition of Adjuvant Chemotherapy to Ovarian Function Suppression Plus Endocrine The1
NRG Oncology Breast Cancer
This Phase III Trial will determine whether adjuvant chemotherapy (ACT) added to ovarian function suppression (OFS) plus endocrine therapy (ET) is superior to OFS plus ET in improving invasive breast cancer-free survival (IBCFS) among premenopausal, early- stage breast cancer (EBC) patients with es1 expand

This Phase III Trial will determine whether adjuvant chemotherapy (ACT) added to ovarian function suppression (OFS) plus endocrine therapy (ET) is superior to OFS plus ET in improving invasive breast cancer-free survival (IBCFS) among premenopausal, early- stage breast cancer (EBC) patients with estrogen receptor (ER)-positive, HER2-negative tumors and 21-gene recurrence score (RS) between 16-25 (for pN0 patients) and 0-25 (for pN1 patients).

Type: Interventional

Start Date: Oct 2023

open study

Pembrolizumab vs. Observation in People With Triple-negative Breast Cancer Who Had a Pathologic Com1
Alliance for Clinical Trials in Oncology Anatomic Stage II Breast Cancer AJCC v8 Early Stage Triple-Negative Breast Carcinoma Anatomic Stage IIIA Breast Cancer AJCC v8 Anatomic Stage IIIB Breast Cancer AJCC v8
This phase III trial compares the effect of continuation of treatment with pembrolizumab (usual approach) to observation only at preventing cancer from coming back in patients with early-stage triple-negative breast cancer (TNBC) who achieved a pathologic complete response after preoperative chemot1 expand

This phase III trial compares the effect of continuation of treatment with pembrolizumab (usual approach) to observation only at preventing cancer from coming back in patients with early-stage triple-negative breast cancer (TNBC) who achieved a pathologic complete response after preoperative chemotherapy in combination with pembrolizumab. The usual approach for patients with early-stage TNBC who receive preoperative chemotherapy plus pembrolizumab is to continue to receive pembrolizumab for up to 27 weeks after surgery. Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. This trial may help researchers determine if observation is as good as receiving pembrolizumab for 27 weeks after surgery in triple-negative breast cancer patients who achieved a pathologic complete response after preoperative treatment with chemotherapy and pembrolizumab.

Type: Interventional

Start Date: Jun 2023

open study

mFOLFIRINOX Versus mFOLFOX With or Without Nivolumab for the Treatment of Advanced, Unresectable, o1
Alliance for Clinical Trials in Oncology Advanced Esophageal Adenocarcinoma Advanced Gastric Adenocarcinoma Advanced Gastroesophageal Junction Adenocarcinoma Clinical Stage III Esophageal Adenocarcinoma AJCC v8 Clinical Stage III Gastric Cancer AJCC v8
This phase III trial compares the effect of modified fluorouracil, leucovorin calcium, oxaliplatin, and irinotecan (mFOLFIRINOX) to modified fluorouracil, leucovorin calcium, and oxaliplatin (mFOLFOX) for the treatment of advanced, unresectable, or metastatic HER2 negative esophageal, gastroesophag1 expand

This phase III trial compares the effect of modified fluorouracil, leucovorin calcium, oxaliplatin, and irinotecan (mFOLFIRINOX) to modified fluorouracil, leucovorin calcium, and oxaliplatin (mFOLFOX) for the treatment of advanced, unresectable, or metastatic HER2 negative esophageal, gastroesophageal junction, and gastric adenocarcinoma. The usual approach for patients is treatment with FOLFOX chemotherapy. Chemotherapy drugs work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Fluorouracil stops cells from making DNA and it may kill tumor cells. Leucovorin is used with fluorouracil to enhance the effects of the drug. Oxaliplatin works by killing, stopping, or slowing the growth of tumor cells. Some patients also receive an immunotherapy drug, nivolumab, in addition to FOLFOX chemotherapy. Immunotherapy may induce changes in body's immune system and may interfere with the ability of tumor cells to grow and spread. Irinotecan blocks certain enzymes needed for cell division and DNA repair, and it may kill tumor cells. Adding irinotecan to the FOLFOX regimen could shrink the cancer and extend the life of patients with advanced gastroesophageal cancers.

Type: Interventional

Start Date: Jan 2023

open study

Transcatheter Mitral Valve Replacement With the Medtronic Intrepid™ TMVR System in Patients With Se1
Medtronic Cardiovascular Mitral Valve Regurgitation
Multi-center, global, prospective, non-randomized, interventional, pre-market trial. All subjects enrolled with receive the study device. expand

Multi-center, global, prospective, non-randomized, interventional, pre-market trial. All subjects enrolled with receive the study device.

Type: Interventional

Start Date: Oct 2017

open study

Brostrom Chronic Lateral Ankle Instability Repairs Augmented With BioBrace®
Massachusetts General Hospital Lateral Ankle Instability Chronic Lateral Ankle Instability Brostrom Procedure ATFL Anterior Talofibular Ligament
The purpose of this investigation is to evaluate pre- and post-operative patient reported outcomes and functional scores after open non-augmented Broström repair or open Broström repair augmented with the BioBrace Implant. expand

The purpose of this investigation is to evaluate pre- and post-operative patient reported outcomes and functional scores after open non-augmented Broström repair or open Broström repair augmented with the BioBrace Implant.

Type: Interventional

Start Date: Jun 2026

open study

Plasma and Radiologic Biomarkers of Response to ECP in Lung Transplant Recipients With CLAD
Brian Keller Lung Transplant Failure and Rejection CLAD, Bronchiolitis Obliterans Extracorporeal Photopheresis
This study is for people who have had a lung transplant and developed a condition called chronic lung allograft dysfunction (CLAD), which is a type of chronic rejection. Doctors often treat CLAD with a procedure called extracorporeal photopheresis (ECP), but it can take up to six months to know if1 expand

This study is for people who have had a lung transplant and developed a condition called chronic lung allograft dysfunction (CLAD), which is a type of chronic rejection. Doctors often treat CLAD with a procedure called extracorporeal photopheresis (ECP), but it can take up to six months to know if the treatment is working. The goal of the study is to find early signs (biomarkers) that show whether ECP is helping, so patients can get the right care sooner. For participants in the study, small blood samples will be collected at three points during ECP treatment and, for some participants, two MRI scans of the lungs will be performed-one before starting ECP and one after finishing treatment. The MRI uses a safe contrast dye to help us see changes in lung blood flow and tissue. Investigators will also look at certain immune cells in the blood. This is not a study of a new drug or treatment-participants will receive the same ECP therapy their doctor already recommended. The study will help researchers understand how ECP works and identify markers that predict who benefits most. There is no direct benefit to participants, but participation may help improve care for future lung transplant patients.

Type: Observational

Start Date: Mar 2026

open study

An Observational Study in Participants With Indolent Systemic Mastocytosis (ISM)
Blueprint Medicines Corporation Indolent Systemic Mastocytosis
This is a Phase 4, non-interventional, observational study to collect detailed data on the clinical characteristics, clinical outcomes and medical management of ISM in real-world settings. The study will describe the demographic and clinical characteristics of ISM participants, including anaphylaxi1 expand

This is a Phase 4, non-interventional, observational study to collect detailed data on the clinical characteristics, clinical outcomes and medical management of ISM in real-world settings. The study will describe the demographic and clinical characteristics of ISM participants, including anaphylaxis and bone manifestations in ISM. Quality of life and disease control will be assessed through participant questionnaires. The study will also evaluate real world ISM treatment management, including use of avapritinib.

Type: Observational

Start Date: Apr 2026

open study

Cardiac Effects of Mineralocorticoid Receptor Antagonism After Preeclampsia
Massachusetts General Hospital Hypertension
The goal of this clinical trial is to determine if the medication eplerenone yields greater improvements in coronary microvascular function than chlorthalidone in women who experienced preeclampsia during pregnancy and subsequently developed chronic hypertension. The main Aims are: - To test th1 expand

The goal of this clinical trial is to determine if the medication eplerenone yields greater improvements in coronary microvascular function than chlorthalidone in women who experienced preeclampsia during pregnancy and subsequently developed chronic hypertension. The main Aims are: - To test the hypothesis that, in women with prior preeclampsia, current chronic hypertension, and concentric LV remodeling, eplerenone improves coronary microvascular function vs. chlorthalidone. - To test the hypothesis that, in women with prior preeclampsia, current chronic hypertension, and concentric LV remodeling, eplerenone improves cardiac structure and function vs. chlorthalidone. Participants will: - First receive pre-treatment with Amlodipine for 12 weeks prior to beginning the study medication. - Start study treatment which involves daily self-administration of two oral capsules (eplerenone + potassium placebo or chlorthalidone + potassium), each taken once a day, for a total of 336 doses over 48 weeks. - Attend study visits at weeks 2, 12, 24, 36, and 48. These visits will involve collecting information, measuring blood pressure, and gathering blood and urine samples. Echocardiography (cardiac ultrasound), eye exam, and cardiac PET/CT scan will be performed during the baseline and week 48 visits.

Type: Interventional

Start Date: Mar 2026

open study