At a Glance
Dosage
oral
| Level | 4-FA | 5-APB |
|---|---|---|
| Threshold | 40 mg | 20 mg |
| Light | 40–100 mg | 40–60 mg |
| Common | 100–130 mg | 60–80 mg |
| Strong | 130–150 mg | 80–100 mg |
| Heavy | 150 mg | 100 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 + 5-APB
No direct interaction data available between these substances. This does not mean the combination is safe.
4-FA — Dangerous Interactions
5-APB — Dangerous Interactions
Frequently Asked Questions
What is the difference between 4-FA and 5-APB?
4-FA is classified as a Entactogen, Stimulants (Substituted amphetamines) while 5-APB is classified as a Entactogen, Stimulants (Substituted amphetamines, Substituted benzofurans). They share 26 effects in common, with 29 effects unique to 4-FA and 7 unique to 5-APB.
Is it safe to combine 4-FA and 5-APB?
There is no direct interaction data available for combining 4-FA and 5-APB. This does not mean the combination is safe. Always exercise caution and research thoroughly.
Which is stronger, 4-FA or 5-APB?
At common doses via oral, 4-FA is typically dosed at 100–130 mg while 5-APB is dosed at 60–80 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.