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

    Mebroqualone Encyclopedic
    Encyclopedic
    Typical encyclopedia coverage. Cross-reference for important decisions.
    • 2 corroborating sources
    • 2 ROAs with full dose ladders
    • duration data present
    • classified Tentative
    • classified Research-chemical

    Aliases: Mbq

    Depressant Research-chemical

    Summary TripSit

    A short acting analogue of Methaqualone, that is much more potent.

    Dose Information TripSit

    ROA Light Common Strong Heavy
    Sublingual 5-8mg 8-15mg 15-20mg 20mg+
    Vapourized 3-5mg 5-10mg 10-20mg 20mg+
    Light Common Strong Heavy

    Onset, Duration & After-effects TripSit

    ROA Onset Peak After Effects
    Sublingual 5-15 min 45-90 min 1-4 hrs
    Vapourized 1-2 min 20-40 min 1-4 hrs

    Add to PsychonautWiki Journal

    The PsychonautWiki Journal logging app doesn't include every substance. To track Mebroqualone there, start adding an ingestion, search for the name, and choose to add it as a custom substance. Paste these values:

    ⬇ Download import file Import this file as custom substances and you get "Mebroqualone (Substance Search)" with every route's full dose ladder and timeline, no typing. Works on iOS and Android (v15+); the format is confirmed by the app's developer. The manual values below work for older versions.
    Name
    Mebroqualone
    Unit
    mg
    Description 
    Mebroqualone
Source: SubstanceSearch (substancesearch.com)

Sublingual dose (mg): threshold 3-5 · light 5-8 · common 8-15 · strong 15-20 · heavy 20+
Vapourized dose (mg): threshold 2-3 · light 3-5 · common 5-10 · strong 10-20 · heavy 20+

Sublingual duration: onset 5-15m · peak 0.75-1.5h · after-effects 1-4h
Vapourized duration: onset 1-2m · peak 20-40m · after-effects 1-4h

Note: ranges are harm-reduction guidance, not a prescription. Start low, go slow, and test your substances.

    Tip: for quicker logging you can also add a Custom Unit in the app, e.g. common dose ~ 11.5 mg (Sublingual).

    The app keeps custom substances simple, so the full dose ranges live in the description text above. Ranges are harm-reduction guidance, not a prescription.

    Tolerance

    Build-up develops over 1–4 weeks of regular use
    Reset days to weeks depending on duration of use

    Tolerance Decay

    Full tolerance 3d Half tolerance 8d Baseline ~14d

    Effects TripSit

    Positive
    • Anxiolytic
    • Muscle Relaxant
    • Stimulation
    Negative
    • Increased heart rate
    • Pupil dilation
    • Insomnia
    Neutral
    • Sedative
    • Dystaxia
    • Hypnotic
    • Sedation
    Positive
    • Reduced anxiety
    • Euphoria
    • Cognitive euphoria
    • Wakefulness
    • Empathy
    Negative
    • Amnesia
    • Anxiety
    • Confusion
    • Compulsive redosing
    Neutral
    • Time distortion
    Positive
    • Increased music appreciation
    • Color enhancement
    • Tactile enhancement
    • Brightened colour
    Negative
    • Light sensitivity
    • Appetite suppression
    • Disinhibition
    • Dehydration
    Neutral
    • Dulled perception
    • Drifting
    Mebroqualone's nerd page Pharmacology, chemical data, effect profiles, and more
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    Helpful Links

    📘 Experience Reports 📖 TripSit 📖 PsychonautWiki