The day to end all days it seemed. An experience I was NOT prepared for. Having little money at the time I bought this cheap Flatliner thinking that the media hype surrounding its potential to kill was just well, hype. I WAS WRONG. I take the pill 10+ I am waiting for the pill to kick in.
4-MTA
Encyclopedic
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 5 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 20 combo interactions documented
- classified Tentative
- classified Research-chemical
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 5 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 20 combo interactions documented
- classified Tentative
- classified Research-chemical
Aliases: Mta, Flatliners, Golden eagle, 4-methylthioamphetamine
Summary
4-MTA is an extremely dangerous substance with a high fatality rate. It acts as both a potent serotonin releaser and MAO-A inhibitor, creating severe risk of fatal serotonin syndrome and hyperthermia. The slow onset (30-90 minutes) leads to high redosing risk and accidental overdose.
Dose Information
Dose basis. Figures reflect scattered user reports and historical harm-reduction summaries; they are NOT safety guidelines. 4-MTA has a delayed onset and a long, accumulating course; redosing has been repeatedly implicated in severe toxicity. Historic tablets sold as 'ecstasy' in the late 1990s contained 4-MTA and were associated with multiple deaths; misrepresentation remains a risk. Treat any unknown pill/powder as potentially high-dose. Avoid redosing entirely. (Dose figures and this note are from Drugs.Wiki.)
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 10-20mg | 20-30mg | 30-40mg | 40mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 30-90 min | 1-2 hrs | 2-8 hrs | 4-12 hrs | 7.5-23.5 hrs |
Effect Profile
2 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Psychedelic
3.0
Light+
3/10
Moderate body load with mild visuals, low headspace
Visual Intensity
×3
5
color enhancement
tracers
pattern recognition enhancement
Headspace Depth
×3
2
confusion
time distortion
Auditory Effects
×1
0
Body Load / Somatic Effects
×1
7
nausea
teeth grinding
tachycardia
increased heart rate
Empathogen
5.0
Moderate+
5/10
Moderate stimulation and sensory enhancement with mild empathy, low euphoria
Empathy / Social Openness
×3
5
empathy
sociability enhancement
Euphoria / Mood Elevation
×2
3
euphoria
Stimulation
×1
7
stimulation
wakefulness
teeth grinding
increased heart rate
Sensory Enhancement
×1
7
tactile enhancement
color enhancement
increased libido
Stimulant
3.6
Moderate
4/10
Strong anxiety/jitters with mild stimulation and focus, low euphoria
Stimulation / Energy
×3
5
stimulation
wakefulness
Euphoria / Mood Lift
×2
3
euphoria
Focus / Productivity
×2
4
analysis enhancement
thought acceleration
Anxiety / Jitters
×1
10
anxiety
tachycardia
increased heart rate
teeth grinding
Based on reports from:
Add to PsychonautWiki Journal
The PsychonautWiki Journal logging app doesn't include every substance. To track 4-MTA 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 "4-MTA (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
4-MTA
Unit
mg
Description
4-MTA Source: SubstanceSearch (substancesearch.com) Oral dose (mg): threshold 5 · light 10-20 · common 20-30 · strong 30-40 · heavy 40+ Oral duration: onset 0.5-1.5h · come-up 1-2h · peak 2-8h · offset 4-12h · total 7.5-23.5h · after-effects 24h 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 ~ 25 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 days to weeks of regular use
Reset
3–7 days for acute; 1–3 weeks for full reset
Tolerance Decay
Half tolerance
3d
Baseline
~21d
Human tolerance kinetics are poorly documented due to rarity and high lethality; assume some acute tolerance with slow recovery over days, and significant pharmacodynamic carryover for at least 24–48 h post-use.
Cross-Tolerances
Effects
Positive
- Stimulation
Negative
- Nausea
- Headache
- Tachycardia
- Increased heart rate
- Pupil dilation
- Teeth grinding
- Hyperthermia
- Muscle rigidity
- Decreased appetite
Positive
- Empathy
- Euphoria
- Sociability enhancement
- Wakefulness
- Analysis enhancement
Negative
- Agitation
- Confusion
- Anxiety
- Thought acceleration
- Time distortion
Positive
- Tactile enhancement
- Increased music appreciation
- Color enhancement
- Increased libido
- Tracers
- Pattern recognition enhancement
Negative
- Light sensitivity
- Dehydration
- Appetite suppression
- Increase sexuality
Combinations
Cross-Check 4-MTA with another substanceCommunity 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 2 reports 1 neutral 1 cautionary visit
[Erowid Note: A substance(s) in this report might be identified incorrectly. Erowid reviewers question the author's identification of the drug described. Although the report is included in the collection, the substance might be something other than the author believed it to be.] I'd rather be addicted to shooting heroi...
4-MTA's nerd page
Pharmacology, chemical data, effect profiles, and more
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Helpful Links
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