Fenethylline
Aliases: Fitton, Captagon, Biocapton, Amfetyline, Phenethylline
Categories
Summary
Fenethylline, once marketed as Captagon, is a prodrug that metabolizes into amphetamine and theophylline. Authentic material carries classic stimulant risks and high addiction potential, while most modern 'Captagon' tablets are counterfeit mixtures. Illicit 'captagon' tablets in MENA regions typically contain amphetamine, caffeine, and fillers rather than genuine fenethylline; dosage guidance here assumes laboratory-verified fenethylline. Rapid parent compound clearance (t½ ≈1.3 hours) is followed by sustained activity of metabolites (amphetamine t½ ≈12-15 hours). Original pharmaceutical formulation was 50 mg tablets.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 20-40mg | 40-100mg | 100-200mg | 200mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | After Effects |
|---|---|---|---|---|---|
| Oral | 20-60 min | 30-60 min | 1-4 hrs | 4-8 hrs | 2-12 hrs |
| Insufflated | 5-15 min | 15-30 min | 1-3 hrs | 3-6 hrs | 2-12 hrs |
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
- Bronchodilation
- Stamina enhancement
Negative
- Increased heart rate
- Abnormal heartbeat
- Increased blood pressure
- Dry mouth
- Muscle cramps
- Insomnia
- Increased bodily temperature
Positive
- Euphoria
- Wakefulness
- Mental clarity
- Increased sociability
- Focus enhancement
- Motivation enhancement
- Analysis enhancement
Negative
- Anxiety
- Irritability
- Increased focus
Positive
- Increased Music Appreciation
- Increased Libido
- Increased libido
- Tactile enhancement
- Increased music appreciation
Negative
- Appetite suppression
- Light sensitivity
- Appetite Suppression
- Dehydration
- Disinhibition