Does Melatonin Show Up on Urine test?

Evidence-based answer reviewed against SAMHSA cutoffs and FDA assay documentation · Updated August 2026

Quick answer: On a urine test, Melatonin typically registers for not tested / no interference after last use. ('Urine remains the employment default because it balances cost, window-length and legal defensibility. Metabolite CONCENTRATIONS (not presence/absence) decide results against cutoff tables, which is why hydration status moves numbers and why validity checks (creatinine, specific gravity) police dilution attempts.',)

How urine testing catches Melatonin

('Urine remains the employment default because it balances cost, window-length and legal defensibility. Metabolite CONCENTRATIONS (not presence/absence) decide results against cutoff tables, which is why hydration status moves numbers and why validity checks (creatinine, specific gravity) police dilution attempts.',)

Never screened.

Compare all specimens

Ranges reflect occasional-to-heavy use patterns from FDA device inserts and SAMHSA-certified lab conventions.
Test typeTypical Melatonin detection window
Urineany: not tested / no interference
Saliva (Mouth Swab)any: n/a
Hair Folliclesn/a
Bloodany: n/a

Context worth knowing

Melatonin is your own sleep hormone sold as a supplement. No drug panel screens for it and no false-positive literature implicates it. Take it freely.

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Does Melatonin Show up in a Urine Drug Test?

No — standard employment panels don't include Melatonin. Only specialized orders reach it.

Does Melatonin Show up on a Urine Drug Test?

No — standard employment panels don't include Melatonin. Only specialized orders reach it.

Do prescriptions count against me?

No — verified prescriptions report as negative through the Medical Review Officer. Declare medications at collection and answer the follow-up call.

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Sources & further reading

  • SAMHSA — Mandatory Guidelines for Federal Workplace Drug Testing Programs (cutoffs, MRO process)
  • DOT — 49 CFR Part 40 procedures for transportation workplace testing
  • Brahm NC et al., Mayo Clinic Proceedings 2008;83(1):66–76 — false-positive cross-reactivity reference
  • FDA — drug-of-abuse test device labeling (detection window conventions)