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

    2C-EF

    Psychedelic Research-chemical

    Summary TheDrug.Wiki

    Extremely limited human data exists for 2C-EF. Start with low doses and verify substance identity via reagent testing or spectroscopy. Avoid combining with serotonergic agents or lithium.

    Dose Information TheDrug.Wiki

    Light Common Strong Heavy

    Onset, Duration & After-effects TheDrug.Wiki

    ROA Onset Comeup Peak Offset After Effects
    Oral 15-60 min 30-60 min 2-4 hrs 6-8 hrs 1-2 hrs

    Effect Profile

    8 reports

    Scores (1–10) curated from multiple sources:

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

    Full methodology

    Psychedelic 5.8
    Strong 6/10

    Strong visuals with moderate body load, mild headspace

    Visual Intensity ×3
    10
    visual geometry color enhancement drifting tracers pattern recognition enhancement color shifting +1 more
    Headspace Depth ×3
    4
    introspection time distortion confusion
    Auditory Effects ×1
    0
    ⚠ Body Load / Somatic Effects ×1
    6
    nausea muscle tension increased heart rate
    Based on reports from:
    Erowid Experience Reports PsychonautWiki 2C-EF
    View methodology →

    Tolerance

    Build-up develops rapidly after a single use (serotonergic psychedelic)
    Reset 7–14 days for baseline

    Tolerance Decay

    Full tolerance 0h Half tolerance 3d Baseline ~7d

    Pattern inferred from general 5‑HT2A psychedelic tolerance: acute near‑complete tolerance same day; partial recovery over ~3–7 days; baseline by ~1–2 weeks. Data quality: anecdotal/analogy.

    Cross-Tolerances

    other 2C phenethylamines
    50%
    tryptamine psychedelics
    30%

    Effects Erowid

    Aggregated from 8 Erowid experience reports

    Positive Effects 7

    Euphoria 87.5% 70%
    Color Enhancement 62.5% 70%
    Empathy 62.5% 70%
    Music Enhancement 62.5% 70%
    Tactile Enhancement 50.0% 70%
    Introspection 50.0% 70%
    Stimulation 37.5% 70%

    Adverse Effects 5

    Muscle Tension 50.0% 70%
    Confusion 37.5% 70%
    Anxiety 37.5% 70%
    Jaw Clenching 37.5% 70%
    Nausea 37.5% 70%

    Combinations TripSit

    2C-EF's nerd page Pharmacology, chemical data, effect profiles, and more
    →

    Helpful Links

    📘 Experience Reports 📖 TheDrug.Wiki 📖 PsychonautWiki