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    Disclaimer
    Opioids carry significant risk of respiratory depression, physical dependence, and fatal overdose. Never combine with other depressants.

    Naltrexone Encyclopedic
    Encyclopedic
    Typical encyclopedia coverage. Cross-reference for important decisions.
    • 2 corroborating sources
    • 1 ROA with full dose ladder
    • 19 combo interactions documented
    • PubChem toxicity data
    • dose data not in PW/TripSit (unverifiable)

    Aliases: Revia, Depade, Trexan, Nalorex, Vivitrol

    Summary Erowid

    Naltrexone is an opiate antagonist used in the treatment of opiate and alcohol addiction. It blocks the effects of opiates so that if a user chooses to take an opiate after taking naltrexone, they do not experience much, if any, effect. This helps improve abstinence in those who can maintain taking the daily dose of naltrexone.

    Dose Information Clinical

    ROA Light Common Strong Heavy
    Oral 1.5-4.5mg 25-50mg 50-100mg 100mg+
    Light Common Strong Heavy

    Effect Profile

    15 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

    Opioid 5.1
    Moderate+ 5/10

    Strong euphoria with moderate itching/nausea, mild sedation

    Euphoria / Warmth ×3
    9
    physical euphoria cognitive euphoria euphoria
    Analgesia ×2
    0
    Sedation / Relaxation ×1
    5
    sedation muscle relaxation
    Itching / Nausea ×1
    6
    nausea constipation

    Tolerance

    Build-up develops within days of regular use; analgesic tolerance faster than respiratory depression tolerance
    Reset 7–14 days for partial reset; full reset may take weeks — tolerance loss greatly increases overdose risk

    Tolerance Decay

    Full tolerance 1d Half tolerance 21d Baseline ~35d

    Effects Erowid

    Aggregated from 15 Erowid experience reports

    Positive Effects 5

    Stimulation 53.3% 70%
    Anxiety Suppression 40.0% 70%
    Body High 20.0% 70%
    Empathy 20.0% 70%
    Tactile Enhancement 20.0% 70%

    Adverse Effects 3

    Nausea 53.3% 70%
    Sweating 26.7% 70%
    Confusion 20.0% 70%

    Combinations TripSit

    Cross-Check Naltrexone with another substance

    Community Trip Reports

    Anecdotal first-person accounts from Reddit, Erowid, and Bluelight. Click a source to expand. Reports are harm-reduction context, not medical guidance.

    Erowid 6 reports 1 positive 4 neutral 1 cautionary visit
    Curse to a Blessing positive exp #99494

    Ever since I was twelve years old I have loved drugs. Name a drug an I've done It and I've loved it. I've never come across a drug I did not like. My first love was Mary Jane, then it was LSD, next it was Benzos, and after that It was any thing that got me high. I've done it all.

    WaveMan · Naltrexone (for Heroin Dependence) · 380 mg IM
    Endorphin Power neutral exp #103409

    In this report I will detail my experience taking 4.5 mg naltrexone (known as low-dose naltrexone) nightly for psychiatric purposes. First, the background information. I have a diagnosis of bipolar 2 disorder and general anxiety disorder.

    TheHivemind · 4.5 mg oral
    Real Buzzkill Tech neutral exp #54279

    I took .1 mg clonidine at 9 AM and 15 mg (1/4 full dose) naltrexone at 930 AM. This is my first time taking Naltrexone ever. I'm an alcoholic and I've been sober for three days. Naltrexone was prescribed to me for the purpose of preventing a relapse.

    Gleetnorx · 15 mg oral
    Not to Be Confused With Suboxone neutral exp #92786

    I am titling this message, “not to be confused with Suboxone” for the simple reason it SHOULD NOT. I have been taking all types of painkillers now for years and years. I have never felt the need for help because I had never had a withdrawal from Opiates until recently. Oxycontin is my demon.

    Mike · 25 mg
    Wonderful at Low Dose neutral exp #108953

    I am an MS patient and have been interested in LDN therapy for a long time but couldn't find a neurologist to prescribe it because it still lacks 'gold standard' clinical evidence. I am also an alcoholic and was prescribed naltrexone several years ago to curb alcohol cravings.

    Luxeffexor · 5 mg oral
    Death in the Air cautionary exp #66772

    I've been addicted to opiates on and off for the past 5 years, and because of a recent relapse I am being forced to take naltrexone. I started taking it 10 days clean, and I've been on it for 2 weeks. Naltrexone treatment has a notoriously low compliance rate, and now I understand why.

    860 · 50 mg oral

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