At a Glance
Dosage
oral
| Level | 4-FA | 4-FMA |
|---|---|---|
| Threshold | 40 mg | 10 mg |
| Light | 40–100 mg | 25–50 mg |
| Common | 100–130 mg | 50–75 mg |
| Strong | 130–150 mg | 100–125 mg |
| Heavy | 150 mg | 125 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 + 4-FMA
No direct interaction data available between these substances. This does not mean the combination is safe.
4-FA — Dangerous Interactions
4-FMA — Dangerous Interactions
Frequently Asked Questions
What is the difference between 4-FA and 4-FMA?
4-FA is classified as a Entactogen, Stimulants (Substituted amphetamines) while 4-FMA is classified as a Entactogen, Stimulants (Substituted amphetamines). They share 6 effects in common, with 49 effects unique to 4-FA and 3 unique to 4-FMA.
Is it safe to combine 4-FA and 4-FMA?
There is no direct interaction data available for combining 4-FA and 4-FMA. This does not mean the combination is safe. Always exercise caution and research thoroughly.
Which is stronger, 4-FA or 4-FMA?
At common doses via oral, 4-FA is typically dosed at 100–130 mg while 4-FMA is dosed at 50–75 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.