Is Melatonin Safe with Estradiol?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Inform your prescriber about melatonin use during hormone replacement therapy. Monitor for changes in sleep quality, mood, or unexpected hormonal symptoms. Dose timing may need adjustment as melatonin is best taken at night away from hormonal medications.
Why this interaction occurs
Melatonin receptors are expressed in ovarian and hypothalamic tissue. Melatonin can modulate GnRH pulsatility and gonadotropin release, potentially interfering with exogenous estrogen therapy. Estrogens, conversely, may upregulate melatonin receptor sensitivity, altering melatonin's pharmacodynamic effects.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 81,232 reports mentioning Estradiol. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Estradiol + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Melatonin interactions → · All Estradiol interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.