Psilocybin vs LSD — honest experiential comparison from someone who has done both many times

The duration difference is the most practically significant: LSD typically lasts 10–12 hours, psilocybin 4–6 hours. This matters enormously for planning and for the experience itself. LSD's longer timeline can be a feature (more time to explore, better for festival settings) or a bug (if things get difficult, you're in it for much longer). Psilocybin's 4–6 hour window feels more manageable and more suited to therapeutic work. Most clinical researchers chose psilocybin over LSD partly for this reason.

Body experience: psilocybin tends to be more body-present — yawning, nausea in the come-up, sensation amplification, more overtly somatic. LSD is more stimulant-like — cardiovascular elevation, energy, less nausea but often jaw clenching. Neither is purely comfortable. Many people find psilocybin's body load easier to work with therapeutically because it invites surrender (the somatic heaviness encourages lying down, inward focus) rather than stimulation (LSD's energy can feel like resistance to the inward journey).

The introspection vs. cognition split is real but overstated. At matched subjective intensity, both can produce profound introspective material. The difference is texture and direction: psilocybin tends to move toward emotional and relational content, LSD toward pattern and systems thinking. But individuals vary enormously, and set and setting matter more than the molecule at matched dose. I've had my most intellectually expansive experiences on psilocybin and my most emotionally raw experiences on LSD. The molecules are tendencies, not destinies.