Does Wild lettuce Show Up on a Drug Test?

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

Quick answer: No — not on any standard panel. Wild lettuce is absent from routine 5-, 10-, and 12-panel employment drug tests. Never screened.

Which panels screen for it

PanelWild lettuce status
5-Panel❌ Not included
10-Panel❌ Not included
12-Panel❌ Not included
DOT 5-panel (safety-sensitive)❌ Not included

The details that matter

Despite the 'lettuce opium' nickname, wild lettuce contains NO opiates — lactucarium's sedative lactones are chemically unrelated and invisible to opiate strips and every other panel.

If it IS detected, how long does it last?

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

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Medical disclaimer: DrugPanels provides educational information about laboratory drug testing and does not offer medical advice, diagnosis, or treatment. Detection windows are population ranges — individual results vary with metabolism, dose, frequency and health status. Never stop prescribed medication to pass a test without talking to your prescriber. Affiliate disclosure: some links on this page are affiliate links; if you order through them we may earn a commission at no additional cost to you.

People also ask

Does Wild Lettuce Show on Drug Test?

No — Wild lettuce is absent from standard drug panels. Full guide →

Does Wild Lettuce Show up on a Drug Test?

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

How accurate are drug tests?

Lab-based immunoassay screens agree with confirmation testing ~97% of the time; confirmed GC–MS results are considered definitive. Home kits trade legal defensibility for convenience.

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.

Related guides

5 Panel Drug Test

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10 Panel Drug Test

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12 Panel Drug Test

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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)