Iboga lasts considerably longer. The psychoactive phase runs approximately 18 to 36 hours, with residual effects including altered sleep, sensitivity, and physical fatigue continuing for several days (Sheppard, 1994). An iboga session requires multi-day recovery and support. Ayahuasca ceremonies typically last 4 to 6 hours per night, which means multiple sessions can be completed across a single week at a retreat.
