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W-15

This article is a stubmissing:
Interactions
Tolerance
Harm Potential
History & Culture
Legality
W-15 molecule structureW-15 molecule structure

W-15 is a potent opioid with a distinct chemical structure unrelated to nearly all other opioid compounds. It is reported to be roughly 5.4 times more potent than morphine. As a research chemical depressant, it carries habit-forming potential.

Dosage & Duration

Dosage

Doses are population estimates that vary widely between individuals.

Threshold~2 mg
Light2-5 mg
Moderate5-10 mg
Strong10-15 mg
Heavy15+ mg

A potent opioid that is 5.4x more potent than morphine.

Duration

Onset15-40 minutes
After Effects2-4 hours
Total4-6 hours

Subjective Effects

Legacy content. A statistically backed ontology from Mindstate Design Labs is coming soon.

The experience is characterized by opioid-typical euphoria and mood elevation alongside pain relief and a relaxed physical state.

Physical

Relaxation and analgesia accompany typical opioid autonomic effects such as dry mouth, itchiness, constipation, and pupil constriction.

AnalgesiaMuscle relaxationItchiness

Autonomic

Cognitive

Euphoria and mood lift are the reported mental effects.

Emotional

Reagent Testing

Expected colorimetric results for common reagent tests. Colors show reaction change over 1–2 minutes.

Marquis(MQ)
white → orange2 → brown2
Mandelin(MD)
yellow2 → green1
Liebermann(LB)
white → orange2
Mecke(ME)
No reaction
No reaction
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Pharmacology

Pharmacodynamics

W-15 is a potent opioid reported to be roughly 5.4 times more potent than morphine. Its structure is distinct from that of nearly all other opioid compounds.

Pharmacokinetics

Absorption & half-lifenot documented yetMetabolitesnone documented yet

Interactions

Interactions not written up yet

An unlisted combination is an unknown one, not a safe one. Check a dedicated combination chart before mixing.

Check TripSit

Tolerance

Tolerance not written up yet

Harm Potential

Harm Potential not written up yet

History & Culture

History & Culture not written up yet

Legality

Legality not written up yet

Article Status

  • Josie Kins avatar
    Step 1 · Automated synthesis

    An autonomous workflow built by Josie Kins compiled this article's foundation from information published across the web.

  • Step 2 · First-pass reviewPending

    Not yet reviewed — this article is pending editorial review by Lyrea.

  • Step 3 · Citation reviewPending

    No one has reviewed this article's citations yet. That second pass checks each claim against the source it cites.

Recent changes7 human edits · latest

Times are UTCNewest first

24 January 2026

  1. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  2. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  3. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  4. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  5. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  6. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  7. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

All changes to this article · Site-wide recent changes

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