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    Disclaimer
    ⚠ Benzodiazepines can cause physical dependence with regular use. Withdrawal can be life-threatening. Never combine with opioids or alcohol.

    Halazepam Well-documented
    Well-documented
    Multiple authoritative sources agree on dosing and effects.
    • 2 corroborating sources
    • 1 ROA with full dose ladder
    • duration data present
    • 17 combo interactions documented
    • PubChem toxicity data

    Aliases: Paxipam, Alapryl, Pacinone

    Depressant Benzodiazepine

    Summary dose.wiki TripSit

    Halazepam is a trifluoromethyl derivative of nordazepam (desmethyldiazepam) with anxiolytic, anticonvulsant, sedative, and muscle relaxant properties. It is metabolized into pharmacologically active desmethyldiazepam with a half-life of 30-100 hours, contributing to prolonged effects and accumulation with repeated use. Halazepam was marketed as having lower toxicity and less tendency to cause paradoxical hostility than diazepam, though it was withdrawn from the US market in 2009 due to poor sales.

    Dose Information dose.wiki TripSit

    ROA Light Common Strong Heavy
    Oral 10-20mg 20-40mg 40-80mg 80mg+
    Light Common Strong Heavy

    Benzo Equivalence Calculator

    mg
    20.0 mg Halazepam
    =
    — mg Diazepam

    ⚠ These are approximate equivalences for educational and cross-tapering reference. Individual response, tolerance, and half-life differences mean actual equivalence varies. Always consult a healthcare provider for tapering guidance.

    Onset, Duration & After-effects dose.wiki TripSit

    ROA Onset Comeup Peak Offset After Effects Total
    Oral 30-60 min 1-2 hrs 1-3 hrs 6-12 hrs 24-48 hrs 8-14 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

    Benzodiazepine 7.1
    Strong+ 7/10

    Strong anxiolysis, cognitive impairment, and euphoria with mild sedation

    Anxiolysis ×3
    10
    anxiety suppression anxiolytic muscle relaxation muscle relaxant emotion suppression
    Sedation / Relaxation ×2
    5
    sedation muscle relaxation
    ⚠ Motor / Cognitive Impairment ×1
    10
    motor control loss memory suppression amnesia delusions of sobriety double vision
    Euphoria / Mood Lift ×1
    10
    cognitive euphoria physical euphoria disinhibition
    View methodology →

    Add to PsychonautWiki Journal

    The PsychonautWiki Journal logging app doesn't include every substance. To track Halazepam 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 "Halazepam (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
    Halazepam
    Unit
    mg
    Description 
    Halazepam
Source: SubstanceSearch (substancesearch.com)

Oral dose (mg): light 10-20 · common 20-40 · strong 40-80 · heavy 80+

Oral duration: onset 0.5-1h · come-up 1-2h · peak 1-3h · offset 6-12h · total 8-14h · after-effects 24-48h

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 ~ 30 mg (Oral).

    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 daily use; hypnotic tolerance faster than anxiolytic tolerance
    Reset weeks to months depending on half-life and duration of use; taper recommended

    Tolerance Decay

    Full tolerance 14d Half tolerance 14d Baseline ~60d

    Sedative and anticonvulsant effects exhibit rapid tolerance with repeated dosing over days to weeks, similar to other benzodiazepines. Cross-tolerance is substantial across benzodiazepines and extends partially to other GABAergic sedatives (alcohol, barbiturates, Z-drugs). Tolerance generally recedes gradually over weeks to months of abstinence; individual variability is large. Data quality is limited; values are heuristic to support harm reduction, not precise pharmacometrics.

    Cross-Tolerances

    Benzodiazepines (class)
    100%
    Alcohol (ethanol)
    30%
    Barbiturates
    50%
    Z-drugs
    70%

    Effects dose.wiki TripSit

    Positive
    • Muscle relaxation
    • Physical euphoria
    • Anxiolytic
    • Muscle Relaxant
    Negative
    • Respiratory depression
    • Motor impairment
    Neutral
    • Sedation
    • Sedative
    • Dystaxia
    • Hypnotic
    Positive
    • Anxiety suppression
    • Cognitive euphoria
    Negative
    • Motor control loss
    • Thought deceleration
    • Emotion suppression
    • Memory suppression
    • Amnesia
    • Dizziness
    • Compulsive redosing
    • Delusions of sobriety
    Positive
    • Increased libido
    • Appetite enhancement
    Negative
    • Disinhibition
    • Acuity suppression
    • Visual acuity suppression
    • Decreased Libido
    • Double vision
    Neutral
    • Dulled perception
    • Perception of bodily heaviness

    Combinations TripSit

    Cross-Check Halazepam with another substance

    Pill Identifiers

    1 known pill identifiers on record — view imprints, colors, shapes, and images
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    Halazepam's nerd page Pharmacology, chemical data, effect profiles, and more
    →

    Helpful Links

    💊 Pill Identifier 📘 Experience Reports 📖 dose.wiki 📖 TripSit 📖 PsychonautWiki