At a Glance
Dosage
oral
| Level | 4F-EPH | 3-FA |
|---|---|---|
| Threshold | 5 mg | 10 mg |
| Light | 5–10 mg | 20–30 mg |
| Common | 10–15 mg | 30–50 mg |
| Strong | 15–30 mg | 50–70 mg |
| Heavy | 30 mg | 70 mg |
Duration
oral
4F-EPH
oral
Afterglow
Onset: 10 min – 25 minAfterglow: 4 hrs – 12 hrs
Total: 5 hrs – 6 hrs
3-FA
oral
Peak
Offset
Afterglow
Onset: 20 min – 1 hrsCome Up: 30 min – 1 hrs
Effects
Safety
Interaction: 4F-EPH + 3-FA
No direct interaction data available between these substances. This does not mean the combination is safe.
4F-EPH — Dangerous Interactions
3-FA — Dangerous Interactions
Frequently Asked Questions
What is the difference between 4F-EPH and 3-FA?
4F-EPH is classified as a Stimulants (Substituted phenidates) while 3-FA is classified as a Stimulants (Amphetamine, Substituted amphetamines). They share 5 effects in common, with 15 effects unique to 4F-EPH and 3 unique to 3-FA.
Is it safe to combine 4F-EPH and 3-FA?
There is no direct interaction data available for combining 4F-EPH and 3-FA. This does not mean the combination is safe. Always exercise caution and research thoroughly.
Which is stronger, 4F-EPH or 3-FA?
At common doses via oral, 4F-EPH is typically dosed at 10–15 mg while 3-FA is dosed at 30–50 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.