3-FMC
Aliases: 3-fluoromethcathinone
Summary
Extremely caustic to nasal mucosa; users report intense burn and chronic rhinitis after repeated insufflation. Strong vasoconstriction requires monitoring extremity temperature. Severe hyponatremia reported in prolonged binges; maintain balanced electrolyte intake.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 25-50mg | 50-100mg | 100-150mg | 150mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 10-30 min | 15-30 min | 60-90 min | 1-2 hrs | 2.4-4.5 hrs |
| Insufflated | 2-10 min | 5-15 min | 60-90 min | 1-2 hrs | 2.1-3.9 hrs |
| Rectal | 5-20 min | 10-20 min | 60-90 min | 1-2 hrs | 2.2-4.2 hrs |
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
4.9
Moderate+
5/10
Moderate stimulation with mild euphoria, sensory enhancement, and empathy
Empathy / Social Openness
×3
4
enhanced sociability
increased sociability
Euphoria / Mood Elevation
×2
5
euphoria
mood lift
Stimulation
×1
7
stimulation
increased energy
teeth grinding
Sensory Enhancement
×1
5
tactile enhancement
increased libido
Stimulant
4.9
Moderate+
5/10
Strong anxiety/jitters with moderate euphoria, mild stimulation and focus
Stimulation / Energy
×3
5
stimulation
increased energy
Euphoria / Mood Lift
×2
7
euphoria
mood lift
motivation enhancement
Focus / Productivity
×2
5
focus enhancement
motivation enhancement
Anxiety / Jitters
×1
10
anxiety
paranoia
teeth grinding
bruxism
sweating
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
1d
Half tolerance
7d
Baseline
~30d
Cathinone stimulants often exhibit rapid withinโsession tolerance with partial recovery over 1โ2 weeks and nearerโbaseline by 4โ6 weeks; values are heuristic from community reports and analogous agents, not formal PK/PD data.
Cross-Tolerances
Effects
Positive
- Stimulation
- Increased energy
- Increased energy/alertness
Negative
- Teeth grinding
- Bruxism
- Sweating
- Insomnia
- Weight loss
- Hyperthermia
- Decreased need for sleep
- Decreased appetite
- Disturbed sleep patterns
- Itchiness
Positive
- Euphoria
- Enhanced sociability
- Focus enhancement
- Motivation enhancement
- Increased sociability
- Mood lift
Negative
- Compulsive redosing
- Anxiety
- Paranoia
- Irritability
- Aggressiveness
- Talkativeness
- Time distortion
- Excessive talking
- Moodiness
Positive
- Increased libido
- Tactile enhancement
- Increased music appreciation
- Tracers
Negative
- Appetite suppression
- Light sensitivity
- Dehydration
- Disinhibition
- Increased sexuality
- Visual and auditory hallucinations
Combinations
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