Is melatonin Safe with opioids (general)?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Melatonin may be used as an adjunct in perioperative multimodal analgesia to help reduce opioid requirements. Inform your anesthesiologist or pain management team about melatonin use so opioid dosing can be appropriately monitored and adjusted to avoid over-sedation or under-treatment of pain.
Why this interaction occurs
Melatonin exhibits anti-nociceptive, anti-inflammatory, and opioid-sparing properties via circadian regulation and anti-inflammatory modulation. Its adjunctive use in multimodal analgesia protocols may reduce the total opioid dose required for effective postoperative pain management, thereby decreasing opioid-related adverse effects and risk of long-term opioid use disorder.
Evidence
Evidence level: moderate.
Data source
PubMed - PMID 41752182
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 1,274,921 reports mentioning opioids (general). This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the opioids (general) + 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 opioids (general) interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.