NCT05184933 · Oregon Health and Science University
Sleep and Circadian Mechanisms in Hypertension
What this study is about
This study is a mechanistic clinical trial designed to investigate the effects of the circadian system and sleep on non-dipping blood pressure (BP) in people with hypertension (HTN).
View original scientific description
This study is a mechanistic clinical trial designed to investigate the effects of the circadian system and sleep on non-dipping blood pressure (BP) in people with hypertension (HTN).
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- BMI 18.5-42kg/m2
- Hypertension (average resting blood pressure between 130/80 mmHg and 160/100 mmHg)
Exclusion criteria
- Over 5 pack-years of smoking;
- Prior shift work within 12 months prior to the study;
- Travel greater than three time zones for at least 3 months;
- History of heart failure, cardiomyopathy, or history of bypass surgery, angioplasty, or previous myocardial infarction;
- Acute or chronic diseases (except hypertension) that may affect outcome measures;
- History of psychological conditions;
- Sleep disorders, like severe sleep apnea, insomnia, etc.;
- Prescription medications (Contraceptives and anti-hypertensive medications are permissible);
- History of Illicit drug use and alcohol dependency;
- 30 days free of cannabis use prior to the study;
- Upper cut-off of 160/100 mmHg for BP
Where
- Portland, Oregon
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Feb 11, 2026 · Source of record for eligibility and locations