3-FMA, a Entactogen, Stimulants, and 4-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 5 documented effects in common, with 3 effects unique to 3-FMA and 4 unique to 4-FMA. This side-by-side comparison covers dosage, duration, subjective effects, and safety to help you make informed decisions.
| Interaction |
| Caution |
| Level | 3-FMA | 4-FMA |
|---|---|---|
| Threshold | 5 mg | 10 mg |
| Light | 10–20 mg | 25–50 mg |
| Common | 20–35 mg | 50–75 mg |
| Strong | 35–50 mg | 100–125 mg |
| Heavy | 50 mg | 125 mg |
3-FMA
4-FMA
Increased cardiovascular strain and neurotoxicity risk