Dosage: 30 mg oral in gel cap Setting: My apartment T0:00- Dose measured out and taken. Powder has an odor reminiscent of acetic acid. T0:15- Onset. Simultaneously a mental and physical sense of uneasiness. T0:40- The uneasiness builds.
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
- 19 combo interactions documented
- toxicity data (PsychonautWiki)
- classified Tentative
- classified Research-chemical
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 6 corroborating sources
- 2 ROAs with full dose ladders
- duration data present
- 19 combo interactions documented
- toxicity data (PsychonautWiki)
- classified Tentative
- classified Research-chemical
Aliases: Mipracetin, O-acetylmiprocin, 4acomipt
Summary
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- itβs whimsical, empathogenic, and feels overall like a pleasant dream.”
Dose Information
| 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
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 19-60 min | 1-2 hrs | 1.5-3 hrs | 1-2 hrs | 3.82-8 hrs |
| Vapourized | 1 min | - | 1-2 hrs | - | - |
Effect Profile
3 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
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
Based on reports from:
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
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Android (v15+); the format is confirmed by the app's
developer.
Ranges are harm-reduction guidance, not a prescription.
Tolerance
Build-up
develops rapidly after a single use
Reset
7β14 days for baseline
Tolerance Decay
Full tolerance
1h
Half tolerance
10d
Baseline
~14d
Acute tolerance: develops within a single session β the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.
Effects
Aggregated from 3 Erowid experience reports
Positive Effects 2
Euphoria
100.0%
70%
Music Enhancement
100.0%
70%
Adverse Effects 0
Combinations
Cross-Check 4-AcO-MiPT with another substanceTrip Reports
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. Tags summarise each author's own verdict — how reports are classified.
Erowid 3 reports 2 positive 1 neutral visit
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.
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.
Bluelight 1 thread 1 neutral visit
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.
Bluelight Reference Guide
β Official β 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
4-AcO-MiPT's nerd page
Pharmacology, chemical data, effect profiles, and more
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