4-FMA, a Entactogen, Stimulants, and 3-FMA, a Entactogen, Stimulants, are frequently compared by users looking to understand their relative effects, dosage profiles, and safety considerations. Both are classified as Entactogen, Stimulantss, meaning they share a common pharmacological foundation. They share 3 documented effects in common, with 4 effects unique to 4-FMA and 2 unique to 3-FMA. This side-by-side comparison covers dosage, duration, subjective effects, and safety to help you make informed decisions.
| Interaction |
| Caution |
| Level | 4-FMA | 3-FMA |
|---|---|---|
| Threshold | 10 mg | 5 mg |
| Light | 25–50 mg | 10–20 mg |
| Common | 50–75 mg | 20–35 mg |
| Strong | 100–125 mg | 35–50 mg |
| Heavy | 125 mg | 50 mg |
4-FMA
Total: 4 hrs – 8 hrs
3-FMA
Total: 3 hrs – 7 hrs
Increased cardiovascular strain and neurotoxicity risk