3,4-DMMC
Aliases: M2, Ocean
Summary
3,4-DMMC was first detected in Europe in 2010 and marketed under street names "Ocean" and "M2" as a mephedrone replacement. Potency is noticeably lower than mephedrone; users describe effects as "blunted" or "foggy." Nasal administration produces pronounced chemical burn and rhinorrhea. Pharmacodynamic data show similar affinity at norepinephrine and serotonin transporters but weaker dopamine transporter activity compared to mephedrone, resulting in mild empathogenic effects and potentially higher cardiovascular strain.
Dose Information
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset |
|---|---|---|---|---|
| Oral | 15-30 min | 30-60 min | 1-2 hrs | 60 min |
| Insufflated | 5-10 min | 15-30 min | 30-60 min | 60 min |
Effect Profile
Scores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Empathogen
6.3
Strong
6/10
Strong sensory enhancement with moderate stimulation and euphoria, mild empathy
Empathy / Social Openness
×3
5
empathy
sociability enhancement
Euphoria / Mood Elevation
×2
6
cognitive euphoria
euphoria
Stimulation
×1
7
stimulation
wakefulness
teeth grinding
increased heart rate
Sensory Enhancement
×1
10
tactile enhancement
music enhancement
color enhancement
increased libido
Stimulant
3.9
Moderate
4/10
Strong anxiety/jitters with moderate euphoria, mild stimulation, low focus
Stimulation / Energy
×3
5
stimulation
wakefulness
Euphoria / Mood Lift
×2
6
cognitive euphoria
euphoria
Focus / Productivity
×2
2
thought acceleration
Anxiety / Jitters
×1
10
anxiety
teeth grinding
increased heart rate
vasoconstriction
Based on reports from:
Tolerance
Build-up
develops rapidly, often within a single session; compulsive redosing common
Reset
a few days for acute tolerance
Tolerance Decay
Full tolerance
1h
Half tolerance
4d
Baseline
~5d
Effects
Positive
- Stimulation
Negative
- Teeth grinding
- Vasoconstriction
- Increased heart rate
- Increased blood pressure
- Pupil dilation
- Increased perspiration
- Insomnia
- Nasal irritation
- Decreased appetite
Positive
- Cognitive euphoria
- Sociability enhancement
- Empathy
- Euphoria
- Wakefulness
Negative
- Compulsive redosing
- Cognitive fog
- Anxiety
- Depression
- Thought acceleration
Positive
- Music enhancement
- Tactile enhancement
- Increased libido
- Increased music appreciation
- Tracers
- Color enhancement
Negative
- Appetite suppression
- Dehydration
- Light sensitivity
- Disinhibition
Combinations
3,4-DMMC's nerd page
Pharmacology, chemical data, effect profiles, and more
→