At a Glance
Dosage
Only in 4-FA
oral
| Level | Dose |
|---|---|
| Threshold | 40 mg |
| Light | 40–100 mg |
| Common | 100–130 mg |
| Strong | 130–150 mg |
| Heavy | 150 mg |
Only in 2-FEA
insufflated
| Level | Dose |
|---|---|
| Threshold | 15 mg |
| Light | 20–30 mg |
| Common | 30–40 mg |
| Strong |
Duration
Only in 4-FA
oral
Total: 5 hrs – 8 hrsPeak
Offset
Afterglow
Onset45 min – 1.3 hrs
Come Up30 min – 1.3 hrs
Peak2.5 hrs – 3.5 hrs
Offset2 hrs – 3 hrs
Effects
Safety
Interaction: 4-FA + 2-FEA
No direct interaction data available between these substances. This does not mean the combination is safe.
4-FA — Dangerous Interactions
Frequently Asked Questions
What is the difference between 4-FA and 2-FEA?
4-FA is classified as a Entactogen, Stimulants (Substituted amphetamines) while 2-FEA is classified as a Entactogen, Stimulants (Substituted amphetamines). They share 36 effects in common, with 19 effects unique to 4-FA and 20 unique to 2-FEA.
Is it safe to combine 4-FA and 2-FEA?
There is no direct interaction data available for combining 4-FA and 2-FEA. This does not mean the combination is safe. Always exercise caution and research thoroughly.
Which is stronger, 4-FA or 2-FEA?
4-FA and 2-FEA are typically administered via different routes, making a direct potency comparison difficult. They belong to different pharmacological profiles and should not be compared by dose alone.