Skip to main content
Lyrea avatar

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

Citation noticeOur citation system is being overhauled

References and citation markers may currently be incomplete, mismatched, or incorrect. This system is being rebuilt and reviewed before the full site launch.

4-MPM

This article is a stubmissing:
Subjective Effects
Pharmacology
Interactions
Tolerance
History & Culture
Legality
4-MPM molecule structure4-MPM molecule structure
4-Methylphenmetrazine
mephenmetrazine, PAL-747
Psychoactive Class
StimulantEntactogen
Chemical Class
Phenylmorpholine (substituted)

Dosage & Duration

Dosage

Doses are population estimates that vary widely between individuals.

Threshold~5 mg
Light5-10 mg
Moderate10-20 mg
Strong20-25 mg
Heavy25+ mg

Subjective Effects

Subjective Effects not written up yet

Reagent Testing

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

Marquis(MQ)
white → green2 → blue2
Mandelin(MD)
yellow2 → green2 → brown2
Froe(FR)
white → purple2
Simons(SI)
orange1 → blue2
Powered by PROtestkit.eu

Pharmacology

Pharmacology not written up 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

Addiction & Dependence

Psychological

Moderate

Classified as habit-forming with reports indicating tolerance builds quickly, suggesting potential for compulsive use patterns typical of stimulant-entactogen compounds.

History & Culture

History & Culture not written up yet

Legality

Legality not written up yet

References

Source Pages

  1. Bluelight thread: Novel stimulant 4-MPM
  2. Bluelight: user report (insufflated ≈100 mg)
  3. PiHKAL.info: 4-MPM chemical data
  4. Wikipedia
  5. Wikipedia: Monoamine releasing agent table

Further Reading

  1. Drugs-Forum: 4-MPM experience report (highganja99)
  2. McLaughlin et al. 2018 Drug Test Anal
  3. McLaughlin et al. 2018 Drug Testing and Analysis
  4. McLaughlin et al. 2018 PMC Full Text
  5. PubChem: 4-Methylphenmetrazine
  6. Reddit r/researchchemicals: 4-MPM compared to 3-FPM
  7. Reddit r/researchchemicals: 4-MPM first impression
  8. ResearchChemsLab vendor spec
  9. TeamChemists product page

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

Suggest an edit

Spotted a mistake, an outdated claim, or something missing from the 4-MPM article? Send the editors a private note. Feedback lands in a moderation queue and is never shown on the site.

Wish to give generalised feedback? You can do so here.