Melatonin Supplements for Improving Sleep in Individuals With Hypertension

Study Overview
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Brief Summary
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This study will evaluate the effectiveness of treatment with melatonin supplements in improving sleep in individuals with high blood pressure who are taking beta-blockers.

Detailed Description
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Hypertension, or high blood pressure, is a condition in which an individual's blood pressure is higher than the normal level. It is estimated that one in three individuals in the United States has high blood pressure, though many do not know it because there are usually no symptoms. Uncontrolled hypertension may lead to stroke, heart attack, heart failure, or kidney failure. Beta-blockers are one class of drugs that have been developed to help lower blood pressure, and thereby decrease the risk for these serious problems. Beta-blockers also lower the levels of melatonin, a hormone that has a sleep-promoting effect. Many individuals who take beta-blockers for hypertension complain that they have trouble sleeping, which may be related to the beta-blockers' effect on melatonin levels. This study will evaluate the effectiveness of treatment with melatonin supplements in improving sleep in individuals with high blood pressure who are taking beta-blockers. In addition, the study will examine whether the melatonin supplements aid in lowering blood pressure. Participants in this double-blind study will be randomly assigned to receive either melatonin supplements or placebo for the duration of the study. Participants will take part in two inpatient phases. Each inpatient stay will last 4 days and will be separated by 3 to 4 weeks. While in the clinic, participants' sleep patterns and core temperature will be recorded and plasma, saliva, and urine samples will be collected. Blood pressure will be measured before and after each inpatient stay, as well as at points during the stay. Throughout the study, participants' activity will be monitored by an accelerometer worn around the wrist.

Official Title
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Melatonin Supplementation in Hypertensive Patients

Conditions
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Sleep Disorders, Hypertension

Intervention / Treatment
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* Drug: Melatonin
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Diagnosed with uncomplicated hypertension Currently being treated with Atenolol (a beta-blocker) Exclusion Criteria: History of medical illness other than essential hypertension Personal or family history of psychiatric illness Current use of any medication other than anti-hypertensive drugs Any recent travel across time zones History of working various shifts on an irregular basis

Ages Eligible for Study
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Minimum Age: 35 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: 1<br>Melatonin (2,5 mg, by mouth, 1 per day, for 3-4 weeks) | Drug: Melatonin<br>* 2,5 mg melatonin, by mouth, 1 per day, for 3-4 weeks<br>* Other names: N-acetyl-5-methoxytryptamine;|
| Placebo Comparator: 2<br>Placebo | Drug: Placebo<br>* Placebo<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Sleep Quality | Sleep efficiency as measured by polysomnography (total time asleep as a percentage of the 8-hour sleep opportunity) | Measurement after 3 weeks of supplementation | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Systolic Blood Pressure | Systolic blood pressure as measured by 24-h ambulatory blood pressure monitoring | Measurement after 3 weeks of supplementation compared to baseline | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Sleep disorders, High blood pressure