2C-E

2C-E (2,5-dimethoxy-4-ethylphenethylamine) is a psychedelic phenethylamine of the 2C family synthesized and characterized by Alexander Shulgin and documented in PiHKAL (1991). It is widely regarded as one of the most intellectually and psychologically demanding members of the 2C series — a compound that experienced psychedelic users approach with respect and that community members consistently describe as the "philosopher's drug" of the 2C family. At common doses (12–22 mg), 2C-E produces a 6–10 hour psychedelic experience of unusual depth and analytical character.

The defining feature of 2C-E relative to its siblings is the presence of a 4-ethyl substituent — an unusual chain group rather than a halogen at the C4 position. This structural feature appears to produce a distinct pharmacological signature: lower potency than 2C-B or 2C-I at equivalent doses, a substantially longer duration, significant mental stimulation and analytical thinking, a marked tendency toward introspection and philosophical inquiry, and pronounced nausea during the come-up. Community members frequently compare it to a "thinking man's psychedelic" — less visually spectacular than 2C-B but producing cognitive and emotional depth that many find more valuable for inner work.

2C-E also has a reputation within the harm reduction community for occasionally producing challenging or difficult experiences even at moderate doses — a property correlated with its intellectually demanding and emotionally penetrating character. The music community has noted 2C-E as exceptional for experiencing music analytically and emotionally, with a particularly intense appreciation for complex harmonic structures. Nausea during the initial 1–2 hours is common enough to be considered predictable; ginger preparations are a widely adopted harm reduction practice.