The short answer
Melatonin may add to drowsiness or impairment from oral levetiracetam. Interaction references flag this possibility, but controlled studies have not established how often it occurs or how risk changes with dose.
What this answer covers
Applies to concurrent oral use; melatonin dose, individual sensitivity, other sedatives and driving or fall risk matter.
- Supplement or preparation
- Melatonin
- Medication ingredient
- levetiracetam
Evidence and practical considerations
Side effects & toxicity
Melatonin can cause drowsiness, and exact interaction references warn of additive CNS effects with levetiracetam; no controlled pair-specific trial quantified risk.
- Exact scope
- melatonin with levetiracetam
- Medication form and route
- oral
- Timing or duration
- Concurrent use; exact duration varied.
What remains uncertain
- Risk magnitude is unknown and may vary by melatonin dose and individual sensitivity.
Factors that may matter: higher melatonin dose; older age; other sedatives; driving or fall risk.
Read the supporting source summaries
Source 1: professional interaction monograph
drugs.com · Source check Jul 25, 2026
Population: People using levetiracetam with melatonin.
Warns that sedation and impairment may increase.
Secondary interaction monograph without controlled outcome data.
Source 2: authoritative medication guidance
nhs.uk · Source check Jul 25, 2026
Population: People taking levetiracetam.
Warns there might be a problem with supplements that make users sleepy or dizzy.
Category-level, not melatonin-specific.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Research summary published |
Article revision: 1ba40e7a4bc7ad1c
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
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Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.