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.
- 4 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.
- 4 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
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 10-20mg | 20-30mg | 30-40mg | 40mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Peak | Offset | Total |
|---|---|---|---|---|
| Oral | 0.75-2 hrs | 2-8 hrs | 4-12 hrs | 8-20 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:
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.
Erowid 2 reports 2 neutral 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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