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

    4-AcO-MiPT Encyclopedic
    Encyclopedic
    Typical encyclopedia coverage. Cross-reference for important decisions.
    • 6 corroborating sources
    • 2 ROAs with full dose ladders
    • duration data present
    • 30 combo interactions documented
    • toxicity data (PsychonautWiki)
    • classified Tentative
    • classified Research-chemical

    Aliases: Mipracetin, O-acetylmiprocin, 4acomipt

    Summary dose.wiki Erowid TripSit PsychonautWiki

    4-AcO-MiPT is a synthetic psychedelic tryptamine that remains relatively uncommon with limited history of human use. The substance is hygroscopic and degrades quickly when exposed to moisture or improper storage; it should be kept in an inert atmosphere in a freezer. The material can develop a sticky, goop-like consistency when exposed to air.

    Perspectives

    “This may now take the throne as my new favorite psychedelic (behind LSD of course). The headspace is nothing short of delightful- it’s whimsical, empathogenic, and feels overall like a pleasant dream.”

    Dose Information dose.wiki

    ROA Light Common Strong Heavy
    Oral 10-15mg 15-20mg 20-35mg 35mg+
    Vapourized 2-5mg 5-10mg 10-15mg 15mg+
    Light Common Strong Heavy
    Sources

    Oral

    Dose ladder — dose.wiki, PsychonautWiki

    Vapourized

    Dose ladder — dose.wiki, TripSit

    Onset, Duration & After-effects dose.wiki TripSit PsychonautWiki

    ROA Onset Comeup Peak Offset After Effects Total
    Oral 19-60 min 1-2 hrs 1.5-3 hrs 1-2 hrs 2-4 hrs 3.82-8 hrs
    Vapourized 1 min - 1-2 hrs - - -

    Effect Profile

    1 reports

    Scores (0–10) curated from multiple sources:

    • Effect keyword matching from PsychonautWiki catalog
    • Weighted by importance: core (×3), major (×2), minor (×1)

    Full methodology

    Psychedelic 9.8
    Extreme 10/10

    Strong visuals, headspace, and auditory effects with low body load

    Visual Intensity ×3
    10
    colour enhancement drifting tracers synaesthesia pattern recognition enhancement colour shifting +4 more
    Headspace Depth ×3
    10
    conceptual thinking thought connectivity emotion enhancement perspective distortions thought loops personal bias suppression +1 more
    Auditory Effects ×1
    10
    auditory distortion auditory hallucination synaesthesia
    ⚠ Body Load / Somatic Effects ×1
    2
    nausea
    Empathogen 2.7
    Light+ 3/10

    Strong sensory enhancement with mild stimulation, low euphoria

    Empathy / Social Openness ×3
    0
    Euphoria / Mood Elevation ×2
    2
    emotion enhancement
    Stimulation ×1
    5
    stimulation wakefulness
    Sensory Enhancement ×1
    10
    spontaneous tactile sensations colour enhancement visual acuity enhancement

    Tolerance

    Build-up develops rapidly after a single use
    Reset 7–14 days for baseline

    Tolerance Decay

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

    Cross-Tolerances

    Lysergamides
    LSD
    Phenethylamines

    Effects dose.wiki PsychonautWiki

    Positive
    Negative
    Neutral
    Positive
    Negative
    Neutral
    Positive
    Neutral

    Combinations

    Cross-Check 4-AcO-MiPT with another substance

    Community Trip Reports

    Anecdotal first-person accounts from Reddit, Erowid, Bluelight, and Dose.wiki. Click a source to expand. Reports are harm-reduction context, not medical guidance. Tags summarise each author's own verdict — how reports are classified.

    Erowid 2 reports 1 positive 1 neutral visit
    An Ecstatic Microdose neutral exp #112868

    An Ecstatic Microdose Experience Date Β– 1/24/19 Compound: 4-AcO-MiPT, sourced from a reputable vendor and consumed with one 12oz beer. Set/setting: dosed 2mg to get a taste for a microdose of the drug, as well as to allergy test the compound. In my apartment by myself.

    ThrownAway · 2 mg oral / 12 oz oral / 1 cup oral
    Cosmic Happiness positive exp #89501

    I had obtained a 100mg sample of 4-Aco-MiPT. The setting was a friends house near a forest and a park. My mind was clear and i had no worries. I took 25mg. T+30min: Im starting to feel something. It feels very friendly and happy. The vibrations/energy felt good.

    Anon · 25 mg oral / smoked
    Bluelight 1 thread 1 neutral visit
    4acomipt 1st Time Exp Wow Most Impressive neutral

    This is the first and possibly last time i've ever done this trip report thing. To be honest i haven't done it before because non of these rcs' have really "moved me to", if you catch my drift. Well last night this changed. So it goes like this i think 22.15 me and the missus takes a cap of miprocetyl(sp?) 16mg each.

    Dose.wiki 1 report 1 positive visit
    Oceanic 30 mg oral in gel cap positive

    This may now take the throne as my new favorite psychedelic (behind LSD of course). The headspace is nothing short of delightful- it’s whimsical, empathogenic, and feels overall like a pleasant dream. It’s mentally stimulating and makes me want to do things,…

    by nervewing

    Bluelight Reference Guide Bluelight

    β˜› Official ☚ The Big & Dandy 4-AcO-MiPT Thread

    I can't find ANY reports on this compound outside of Tihkal. The only information I am able to find about it is in the Tihkal entry for 4-HO-MiPT. ....they both seem promising, but I'd like to hear some first hand accounts, as Shulgin focuses on 4-HO-MiPT, and doesn't go into much detail on the 4-AcO.

    Read full thread on Bluelight β†’
    →

    Helpful Links

    Import into PsychonautWiki Journal

    The PsychonautWiki Journal app includes 4-AcO-MiPT, but its built-in data can be thinner than ours. Importing this file adds a separate "4-AcO-MiPT (Substance Search)" custom substance with our dose ranges, durations and tolerance, so you can log against whichever you prefer.

    ⬇ Download import file Import this file as custom substances and you get "4-AcO-MiPT (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.

    Ranges are harm-reduction guidance, not a prescription.