Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 11/17/2025

Melatonin and Blood Pressure Management

Clinical Guidelines

  • The American College of Cardiology may recommend starting with 2.5-3 mg of controlled-release melatonin taken 1-1.5 hours before bedtime for blood pressure management, with potential increases to 5-10 mg if inadequate response after 1-2 weeks 1
  • Beta-blockers suppress endogenous melatonin production, which may explain some of their cardiovascular effects and suggests potential benefit from melatonin supplementation in patients taking beta-blockers, according to Clinical and Translational Medicine 2

Medication Interactions

  • Use caution with warfarin due to potential interactions when taking melatonin, as suggested by Praxis Medical Insights: Practical Summaries of Clinical Guidelines 3
  • NSAIDs suppress melatonin and should be avoided for 72 hours before assessing melatonin effects, as reported by Clinical and Translational Medicine 2

Quality Concerns

  • Choose United States Pharmacopeial Convention Verified formulations for reliable dosing of melatonin, as recommended by Praxis Medical Insights: Practical Summaries of Clinical Guidelines 1, 3

Monitoring Considerations

  • Monitor for impaired glucose tolerance, as melatonin has been associated with this in healthy individuals after acute administration, according to Praxis Medical Insights: Practical Summaries of Clinical Guidelines 3

REFERENCES

1

Lower Doses of Melatonin Can Be More Effective Than Higher Doses [LINK]

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

3

Melatonin Use During Pregnancy: Safety and Guidelines [LINK]

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025