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

    Fenethylline

    Aliases: Fitton, Captagon, Biocapton, Amfetyline, Phenethylline

    Stimulant Research-chemical

    Summary TheDrug.Wiki PsychonautWiki

    Fenethylline, once marketed as Captagon, is a prodrug that metabolizes into amphetamine and theophylline. Authentic material carries classic stimulant risks and high addiction potential, while most modern 'Captagon' tablets are counterfeit mixtures. Illicit 'captagon' tablets in MENA regions typically contain amphetamine, caffeine, and fillers rather than genuine fenethylline; dosage guidance here assumes laboratory-verified fenethylline.

    Dose Information TheDrug.Wiki PsychonautWiki

    ROA Light Common Strong Heavy
    Oral 20-40mg 40-100mg 100-200mg 200mg+
    Light Common Strong Heavy

    Onset, Duration & After-effects TheDrug.Wiki PsychonautWiki

    ROA Onset Comeup Peak Offset After Effects
    Oral 20-60 min 30-60 min 1-4 hrs 4-8 hrs 2-12 hrs
    Insufflated 5-15 min 15-30 min 1-3 hrs 3-6 hrs 2-12 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 6.9
    Strong+ 7/10

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

    Stimulation / Energy ×3
    7
    stimulation stamina enhancement wakefulness
    Euphoria / Mood Lift ×2
    5
    euphoria motivation enhancement
    Focus / Productivity ×2
    10
    focus enhancement mental clarity analysis enhancement motivation enhancement
    ⚠ Anxiety / Jitters ×1
    6
    anxiety increased heart rate
    Based on reports from:
    Erowid Experience Reports PsychonautWiki Fenethylline
    View methodology →

    Tolerance

    Build-up develops over days to weeks of regular use
    Reset 3–7 days for acute; 1–3 weeks for full reset

    Cross-Tolerances

    Amphetamine
    70%
    Methamphetamine
    60%
    Cathinones
    50%
    Other phenethylamine stimulants
    40%

    Effects TheDrug.Wiki

    Positive
    • Stimulation
    • Bronchodilation
    • Stamina enhancement
    Negative
    • Increased heart rate
    • Abnormal heartbeat
    • Increased blood pressure
    • Dry mouth
    • Muscle cramps
    • Insomnia
    Neutral
    • Increased bodily temperature
    Positive
    • Euphoria
    • Wakefulness
    • Mental clarity
    • Increased sociability
    • Focus enhancement
    • Motivation enhancement
    • Analysis enhancement
    Negative
    • Anxiety
    • Irritability
    Neutral
    • Increased focus
    Positive
    • Increased Music Appreciation
    • Increased Libido
    • Increased libido
    • Tactile enhancement
    • Increased music appreciation
    Negative
    • Appetite suppression
    • Light sensitivity
    • Appetite Suppression
    • Dehydration
    • Disinhibition

    Combinations TripSit

    Fenethylline's nerd page Pharmacology, chemical data, effect profiles, and more
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    Helpful Links

    📘 Experience Reports 📖 TheDrug.Wiki 📖 PsychonautWiki