4-FA, a Entactogen, Stimulants, and MDA, a Psychedelic, Entactogen, Stimulants, are frequently compared by users looking to understand their relative effects, dosage profiles, and safety considerations. 4-FA is classified as a Entactogen, Stimulants while MDA is a Psychedelic, Entactogen, Stimulants, meaning they approach altered states through different pharmacological mechanisms. They share 48 documented effects in common, with 7 effects unique to 4-FA and 33 unique to MDA. This side-by-side comparison covers dosage, duration, subjective effects, and safety to help you make informed decisions.
| Level | 4-FA | MDA |
|---|---|---|
| Threshold | 40 mg | 20 mg |
| Light | 40–100 mg | 40–60 mg |
| Common | 100–130 mg | 60–100 mg |
| Strong | 130–150 mg | 100–145 mg |
| Heavy | 150 mg | 145 mg |
4-FA
MDA
No direct interaction data available between these substances. This does not mean the combination is safe.