A psychedelic journey must not be undertaken lightly, and should always be prepared for, and respected. The Shamans know this. Abuse of the psychedelic state will wear a person out, and some people have been reduced to vegetables by doing too much. Psychedelics show you what a rare miracle it is to be given a body, and make you want to take care of it. Most people know when they've had enough or when they have learned what they need for the time being.
Vitamins are very important, to replenish the well worked system.