Caffeine, a Stimulants, and 3-FEA, a Entactogen, Stimulants, are frequently compared by users looking to understand their relative effects, dosage profiles, and safety considerations. Caffeine is classified as a Stimulants while 3-FEA is a Entactogen, Stimulants, meaning they approach altered states through different pharmacological mechanisms. They share 21 documented effects in common, with 9 effects unique to Caffeine and 8 unique to 3-FEA. This side-by-side comparison covers dosage, duration, subjective effects, and safety to help you make informed decisions.
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| Effects | 30 documented | 29 documented |
| Interaction | Uncertain | |
| Level | Caffeine | 3-FEA |
|---|---|---|
| Threshold | 2.5 mg | 15 mg |
| Light | 10–25 mg | 20–35 mg |
| Common | 25–40 mg | 35–60 mg |
| Strong | 40–80 mg | 50–60 mg |
| Heavy | 80 mg | 60 mg |
| Level | Caffeine | 3-FEA |
|---|---|---|
| Threshold | 10 mg | 15 mg |
| Light | 20–50 mg | 20–35 mg |
| Common | 50–150 mg | 35–70 mg |
| Strong | 150–500 mg | 70–90 mg |
| Heavy | 500 mg | 90 mg |
| Level | Dose |
|---|---|
| Threshold | 25 mg |
| Light | 25–75 mg |
| Common | 75–125 mg |
| Strong | 125–175 mg |
| Heavy | 175 mg |
Caffeine
Total: 1 hrs – 2.5 hrs
3-FEA
Total: 1 hrs – 2 hrs
Caffeine
Total: 2 hrs – 5 hrs
3-FEA
Total: 45 min – 1.2 hrs
Total: 4 hrs – 6 hrs