Caffeine, a Stimulants, and 2-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 2-FEA is a Entactogen, Stimulants, meaning they approach altered states through different pharmacological mechanisms. They share 24 documented effects in common, with 6 effects unique to Caffeine and 16 unique to 2-FEA. This side-by-side comparison covers dosage, duration, subjective effects, and safety to help you make informed decisions.
insufflated |
| Effects | 30 documented | 40 documented |
| Level | Caffeine | 2-FEA |
|---|---|---|
| Threshold | 2.5 mg | 15 mg |
| Light | 10–25 mg | 20–30 mg |
| Common | 25–40 mg | 30–40 mg |
| Strong | 40–80 mg | 40–60 mg |
| Heavy | 80 mg | 60 mg |
| Level | Dose |
|---|---|
| Threshold | 10 mg |
| Light | 20–50 mg |
| Common | 50–150 mg |
| Strong | 150–500 mg |
| Heavy | 500 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
2-FEA
Total: 1 hrs – 2.5 hrs
Total: 2 hrs – 5 hrs
No direct interaction data available between these substances. This does not mean the combination is safe.
Total: 45 min – 1.2 hrs