Cited by 38Circadian rhythm and melatoninBlood Pressure and Hypertension StudiesSleep and related disorders

Controlled-release oral melatonin supplementation for Hypertension and nocturnal Hypertension: A systematic review and meta-analysis

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Lee, Eric Kam‐Pui, Poon, Paul, Yu, Chun‐Pong, Lee, Vivian Wing‐Yan, Chung, Vincent Chi‐Ho, Wong, Samuel Yeung‐Shan·2022·The Journal of Clinical Hypertension

Abstract

Abstract Oral melatonin is a potential alternative treatment for hypertension and nocturnal hypertension. However, high‐quality and relevant meta‐analyses are lacking. This meta‐analysis aimed to investigate whether oral melatonin supplementation reduces daytime/asleep blood pressure and cardiovascular risk, improves sleep quality, and is well‐tolerated compared with placebo. Relevant articles were searched in multiple databases, including MEDLINE, EMBASE, CINAHL Complete, and the Cochrane Library, from their inception to June 2021. The included studies were randomized controlled trials recruiting patients with hypertension, using oral melatonin as the sole intervention, and investigating its effect on blood pressure. The mean out‐of‐office (including 24‐h, daytime, and asleep) systolic and diastolic blood pressures, sleep quality, and side effects were compared between the melatonin and placebo arms using pairwise random‐effect meta‐analyses. A risk of bias assessment was performed using the Cochrane risk‐of‐bias tool. Four studies were included in the analysis and only one study was considered to have a low risk of bias. No study reported on cardiovascular risk or outcomes. Only controlled‐release melatonin (not an immediate‐release preparation) reduced asleep systolic blood pressure by 3.57 mm Hg (95% confidence interval: –7.88 to .73; I2 = 0%). It also reduced asleep and awake diastolic blood pressure, but these differences were not statistically significant. Melatonin improves sleep efficacy and total sleep time and is safe and well‐tolerated. Due to the limited number of high‐quality trials, the quality of evidence was low to very low. Therefore, adequately powered randomized controlled trials on melatonin are warranted.

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Authors
Lee, E. K., Poon, P., Yu, C., Lee, V. W., Chung, V. C., & Wong, S. Y.
Affiliations
  • Chinese University of Hong Kong (HK)
  • Jockey Club School of Public Health and Primary Care, Faculty of Medicine The Chinese University of Hong Kong Hong Kong
Corresponding author
Lee, Eric Kam‐Pui
Venue
The Journal of Clinical Hypertension
Publisher
Wiley
Published
2022-04-07
Volume
24
Issue
5
Pages
529-535
ISSN
  • 1524-6175 (ISSN-L)
  • 1751-7176
OpenAlex
W4225677985
Cited by
38
References
31
Citations by year
2026: 5 · 2025: 9 · 2024: 14 · 2023: 6 · 2022: 3 · 2014: 1
FWCI
1.15
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Hypertension (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Blood Pressure and Hypertension Studies
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
melatonin, hypertension, nocturnal hypertension, blood pressure, sleep quality, cardiovascular risk, tolerability, total sleep time
MeSH terms
Blood Pressure, Delayed-Action Preparations, Humans, Hypertension, Melatonin, Randomized Controlled Trials as Topic, Dietary Supplements

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