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According to clinical guidelines, several groups should avoid or use melatonin with caution:

  • Pregnant or breastfeeding women due to limited safety data
  • People with autoimmune disorders as it may increase immune system activity
  • Those with bleeding disorders or taking blood thinners
  • Individuals with seizure disorders or depression

Additionally, people taking certain medications should consult their healthcare provider before using melatonin, including those on:

  • Blood pressure medications
  • Diabetes medications
  • Birth control pills

Children should only take melatonin under medical supervision.

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Last Updated: August 22, 2025

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