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    🧪 This is a research chemical with limited data on its long-term health effects, toxicity profile, and safe dosage ranges.

    4-EPD

    Aliases: P-epd, 4-ethylpentedrone, Para-ethyl pentedrone, 4-ethyl-alpha-methylamino-valerophenone

    Stimulant Research-chemical

    Summary TheDrug.Wiki TripSit

    4-EPD is a ring-ethyl analogue of pentedrone first detected in European drug-checking samples in 2018. Toxicological information is sparse; a handful of fatal intoxications have been documented, usually with poly-drug use. Acute risks mirror those of other potent cathinones: tachycardia, hypertension, hyperthermia, rhabdomyolysis, hyponatremia from excessive water intake, acute psychosis, and serotonin syndrome when mixed with serotonergics.

    Dose Information TheDrug.Wiki TripSit

    ROA Light Common Strong Heavy
    Insufflated 10-20mg 20-30mg 30-50mg 50mg+
    Light Common Strong Heavy

    Onset, Duration & After-effects TheDrug.Wiki TripSit

    ROA Onset Peak Offset After Effects Total
    Oral 20-45 min 30-90 min 1-2 hrs 2-8 hrs 1.8-4.2 hrs
    Insufflated 5-30 min 30-90 min 1-2 hrs 2-8 hrs 1.6-4 hrs
    Rectal 5-15 min 30-90 min 1-2 hrs 2-8 hrs 1.6-3.8 hrs

    Effect Profile

    Scores (1–10) curated from multiple sources:

    • Effect keyword matching from PsychonautWiki catalog
    • Weighted by importance: core (×3), major (×2), minor (×1)

    Full methodology

    Stimulant 4.1
    Moderate 4/10

    Strong anxiety/jitters with moderate euphoria, mild focus, low stimulation

    Stimulation / Energy ×3
    3
    stimulation
    Euphoria / Mood Lift ×2
    7
    euphoria cognitive euphoria motivation enhancement
    Focus / Productivity ×2
    5
    focus enhancement motivation enhancement
    ⚠ Anxiety / Jitters ×1
    10
    anxiety increased heart rate teeth grinding vasoconstriction
    Based on reports from:
    Erowid Experience Reports PsychonautWiki 4-EPD
    View methodology →

    Tolerance

    Build-up develops rapidly, often within a single session; compulsive redosing common
    Reset a few days for acute tolerance

    Tolerance Decay

    Full tolerance 1h Half tolerance 4d Baseline ~5d

    Effects TheDrug.Wiki

    Positive
    • Stimulation
    Negative
    • Increased heart rate
    • Teeth grinding
    • Vasoconstriction
    • Insomnia
    • Pupil dilation
    • Nausea
    Neutral
    • Elevated blood pressure
    • Sedation
    • Decreased appetite
    Positive
    • Euphoria
    • Motivation enhancement
    • Increased sociability
    • Focus enhancement
    • Empathy enhancement
    • Cognitive euphoria
    Negative
    • Compulsive redosing
    • Anxiety
    Neutral
    • Anxiolysis or Anxiety
    • Time distortion
    Positive
    • Tactile enhancement
    • Color enhancement
    • Increased music appreciation
    • Brightened colour
    Negative
    • Appetite suppression
    • Disinhibition
    • Light sensitivity
    • Dehydration
    Neutral
    • Dulled perception
    • Drifting

    Combinations TripSit

    4-EPD's nerd page Pharmacology, chemical data, effect profiles, and more
    →

    Helpful Links

    📘 Experience Reports 📖 TheDrug.Wiki 📖 TripSit 📖 PsychonautWiki