At a Glance
Dosage
oral
| Level | 4-FA | 3-FEA |
|---|---|---|
| Threshold | 40 mg | 15 mg |
| Light | 40–100 mg | 20–35 mg |
| Common | 100–130 mg | 35–70 mg |
| Strong | 130–150 mg | 70–90 mg |
| Heavy | 150 mg | 90 mg |
Only in 3-FEA
insufflated
| Level | Dose |
|---|---|
| Threshold | 15 mg |
Duration
oral
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
Effects
Safety
Interaction: 4-FA + 3-FEA
No direct interaction data available between these substances. This does not mean the combination is safe.
4-FA — Dangerous Interactions
3-FEA — Dangerous Interactions
Frequently Asked Questions
What is the difference between 4-FA and 3-FEA?
4-FA is classified as a Entactogen, Stimulants (Substituted amphetamines) while 3-FEA is classified as a Entactogen, Stimulants (Amphetamine, Substituted amphetamines). They share 34 effects in common, with 21 effects unique to 4-FA and 5 unique to 3-FEA.
Is it safe to combine 4-FA and 3-FEA?
There is no direct interaction data available for combining 4-FA and 3-FEA. This does not mean the combination is safe. Always exercise caution and research thoroughly.
Which is stronger, 4-FA or 3-FEA?
At common doses via oral, 4-FA is typically dosed at 100–130 mg while 3-FEA is dosed at 35–70 mg. However, "stronger" depends on context — potency, subjective intensity, and duration all factor in. These substances have different pharmacological profiles and comparing raw potency is not straightforward.