4F-EPH, a Stimulants, and 3-FEA, a Entactogen, Stimulants, are frequently compared by users looking to understand their relative effects, dosage profiles, and safety considerations. 4F-EPH is classified as a Stimulants while 3-FEA is a Entactogen, Stimulants, meaning they approach altered states through different pharmacological mechanisms. They share 20 documented effects in common, with 9 effects unique to 4F-EPH and 19 unique to 3-FEA. This side-by-side comparison covers dosage, duration, subjective effects, and safety to help you make informed decisions.
| Effects | 29 documented | 39 documented |
| Level | 4F-EPH | 3-FEA |
|---|---|---|
| Threshold | 5 mg | 15 mg |
| Light | 5–10 mg | 20–35 mg |
| Common | 10–15 mg | 35–70 mg |
| Strong | 15–30 mg | 70–90 mg |
| Heavy | 30 mg | 90 mg |
| Level | Dose |
|---|---|
| Threshold | 15 mg |
| Light | 20–35 mg |
| Common | 35–60 mg |
| Strong | 50–60 mg |
| Heavy | 60 mg |
4F-EPH
3-FEA
No direct interaction data available between these substances. This does not mean the combination is safe.