Most ayahuasca ceremonies last four to six hours from the time of drinking. Onset arrives twenty to sixty minutes after ingestion. Peak effects typically run from roughly sixty to one hundred and fifty minutes. The full experience, including the gradual return to ordinary consciousness, generally resolves within four to six hours, though some people feel residual shifts in perception and mood into the following day (Riba et al., 2003). Ceremonies are typically held at night and run until the early morning hours.
