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4-EPD

This article is a stubmissing:
Subjective Effects
Pharmacology
Interactions
Tolerance
Harm Potential
History & Culture
Legality
4-EPD molecule structure4-EPD molecule structure
4-Ethylpentedrone
p-EPD, para-ethyl pentedrone, 4-ethyl-alpha-methylamino-valerophenone
Psychoactive Class
Stimulant
Chemical Class
Cathinone (substituted)

Dosage & Duration

Dosage

Doses are population estimates that vary widely between individuals.

Threshold~10 mg
Light10-20 mg
Moderate20-30 mg
Strong30-50 mg
Heavy50+ mg

Duration

After Effects1-6 hours
Total1-3 hours

Subjective Effects

Subjective Effects not written up yet

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

Harm Potential not written up yet

History & Culture

History & Culture not written up yet

Legality

Legality not written up yet

References

Further Reading

  1. Backberg, Helander et al. Identification of 4-ethylpentedrone in acute intoxications, Sweden 2018-2020
  2. EMCDDA Early-Warning System report: 4-Ethylpentedrone (4-EPD) 2021
  3. Global Drug Survey 2023 - Cathinone section (self-reported effects and harms)
  4. PubChem: 163193057
  5. Reddit: r/researchchemicals - User experience compilation on 4-EPD (accessed 2025-03-29)
  6. Trost et al. Fatal intoxication involving 4-ethylpentedrone documented by high-resolution mass spectrometry (Forensic Sci Int, 2022)

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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