From the databaseWhat the row says.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
Scope
Supplement × Prescription
Last verified
June 4, 2026
CautionEmerging evidence
What is happening. Melatonin can add to clonidine-related sedation, dizziness, and blood pressure lowering.
Mechanism. Additive central nervous system sedation and sympatholytic blood pressure effects.
Recommendation. Avoid driving or hazardous tasks until effects are known; monitor for morning sedation, falls, or symptomatic hypotension.
Stack Score
How it moves the number.
Effect on the composite score
If both Clonidine and Melatonin are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.
SourcesSources, by evidence tier.
Every claim on this page is cited. PMIDs link straight to PubMed.
Reference material
1- 1DailyMed. Clonidine US prescribing information. 2026.Needs sourceNo link