4-FEA
Aliases: P-fluoroethamphetamine, 4-fluoroethylamphetamine, Para-fluoroethamphetamine
Categories
Summary
4-FEA is the ethyl analogue of 4-FA with strong serotonergic properties. Limited formal pharmacological research exists; batch-to-batch variability is high. The compound is intensely serotonergic and may produce significant after-effects including headaches and cardiovascular strain. At least one documented case of serotonin syndrome after a single 40 mg dose has been reported. Start low, avoid redosing within 24 hours, and space sessions generously to minimize risk.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 25-50mg | 50-75mg | 75-150mg | 150mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | After Effects | Total |
|---|---|---|---|---|---|---|
| Oral | 20-45 min | 30-60 min | 1-3 hrs | 1-2 hrs | 1-12 hrs | 240-0 min |
| Insufflated | 5-15 min | 15-30 min | 1-2 hrs | 1-2 hrs | 1-12 hrs | 240-0 min |
Tolerance
Build-up
develops over days to weeks of regular use
Reset
3–7 days for acute; 1–3 weeks for full reset
Effects
Positive
- Stimulation
Negative
- Pupil dilation
- Increased perspiration
- Teeth grinding
- Headaches
- Increased heart rate
- Vasoconstriction
- Insomnia
- Sweating
- Decreased appetite
Positive
- Cognitive euphoria
- Empathy, affection, and sociability enhancement
- Wakefulness
- Alertness enhancement
- Euphoria
- Motivation enhancement
Negative
- Anxiety
- Talkativeness
- Time distortion
- Thought acceleration
Positive
- Increased music appreciation
- Tactile enhancement
- Increased libido
- Tracers
- Color enhancement
- Pattern recognition enhancement
Negative
- Light sensitivity
- Dehydration
- Appetite suppression
- Disinhibition