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

    Phenibut

    Aliases: Phgaba, Noofen, Bifren, Fenibut, Anvifen

    Depressant Nootropic Research-chemical

    Summary TheDrug.Wiki Erowid TripSit PsychonautWiki

    Phenibut is a GABA-B receptor agonist and gabapentinoid with anxiolytic and sedative effects. It has a delayed onset of 1.5-3 hours which can lead to accidental overdose from redosing. Combining with other depressants can cause severe CNS depression, unconsciousness, and potentially fatal respiratory depression.

    Dose Information TheDrug.Wiki TripSit PsychonautWiki

    ROA Light Common Strong Heavy
    Oral BA ~65% 0.5-1g 1-2g 2-3.5g 3.5g+
    Rectal 0.5-1g 1-2g 2-3.5g 3.5g+
    Light Common Strong Heavy

    Onset, Duration & After-effects TheDrug.Wiki TripSit PsychonautWiki

    ROA Onset Comeup Peak Offset After Effects Total
    Oral 1.5-3 hrs 1.5-3 hrs 3-4 hrs 4-6 hrs 6-24 hrs 4-10 hrs
    Rectal 30-60 min - 1-3 hrs 2-3 hrs 1-24 hrs 4-10 hrs

    Tolerance

    Build-up develops rapidly within 2–5 days of daily use; high dependence potential
    Reset 7–14 days; withdrawal can be severe

    Tolerance Decay

    Full tolerance 1h Half tolerance 10d Baseline ~14d

    Cross-Tolerances

    Other
    Alcohol
    30%
    GHB
    30%
    GBL
    30%
    Gabapentinoids
    Gabapentin
    80%
    Pregabalin
    80%

    Effects Erowid Bluelight

    Aggregated from 120 Erowid and 25 Bluelight experience reports

    Positive Effects 33

    Anxiety Suppression 56.5% 92%
    Stimulation 46.2% 84%
    Euphoria 40.0% 87%
    Sedation 39.3% 84%
    Sociability Enhancement 32.0% 81%
    Music Enhancement 30.3% 90%
    Focus Enhancement 26.9% 82%
    Contentment 24.0% 85%
    Hypersomnia 24.0% 81%
    Peace 24.0% 85%
    Empathy 23.4% 80%
    Joy 20.0% 81%
    Tactile Enhancement 18.3% 70%
    Thought Acceleration 12.0% 87%
    Body High 10.4% 75%
    Closed-Eye Visuals 9.0% 95%
    Relaxation 8.0% 90%
    Geometric Imagery 8.0% 90%
    Libido Enhancement 8.0% 75%
    Bliss 8.0% 88%

    Adverse Effects 55

    Nausea 26.9% 86%
    Dizziness 24.0% 85%
    Confusion 19.3% 88%
    Headache 18.6% 88%
    Visual Distortions 17.3% 75%
    Body Load 16.0% 84%
    Focus Suppression 16.0% 79%
    Insomnia 16.0% 81%
    Auditory Effects 15.2% 90%
    Thought Disorganization 12.0% 75%
    Vomiting 12.0% 92%
    Memory Suppression 11.1% 78%
    Sweating 8.3% 85%
    Heaviness 8.0% 80%
    Disinhibition 8.0% 80%
    Panic 8.0% 95%
    Ataxia 8.0% 85%
    Metallic Taste 8.0% 95%
    Increased Heart Rate 7.5% 70%
    Muscle Tension 6.7% 70%

    Combinations TripSit

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

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