At a Glance
Dosage
oral
| Level | 4F-MPH | 2-FA |
|---|---|---|
| Threshold | 5 mg | 5 mg |
| Light | 5–10 mg | 15–30 mg |
| Common | 10–15 mg | 30–50 mg |
| Strong | 15–20 mg | 50–60 mg |
| Heavy | 20 mg | 60 mg |
Only in 4F-MPH
insufflated
| Level | Dose |
|---|---|
| Threshold | 5 mg |
Duration
oral
4F-MPH
oral
Total: 4 hrs – 8 hrsPeak
Afterglow
Onset30 min – 1 hrs
Peak2 hrs – 4 hrs
Offset1 hrs – 2 hrs
Afterglow5 hrs – 10 hrs
2-FA
Effects
Safety
Interaction: 4F-MPH + 2-FA
No direct interaction data available between these substances. This does not mean the combination is safe.
4F-MPH — Dangerous Interactions
2-FA — Dangerous Interactions
Frequently Asked Questions
What is the difference between 4F-MPH and 2-FA?
4F-MPH is classified as a Stimulants (Substituted phenidates) while 2-FA is classified as a Stimulants (Substituted amphetamines). They share 11 effects in common, with 28 effects unique to 4F-MPH and 1 unique to 2-FA.
Is it safe to combine 4F-MPH and 2-FA?
There is no direct interaction data available for combining 4F-MPH and 2-FA. This does not mean the combination is safe. Always exercise caution and research thoroughly.
Which is stronger, 4F-MPH or 2-FA?
At common doses via oral, 4F-MPH is typically dosed at 10–15 mg while 2-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.