( getting the test drug or the placebo wo...)Hopkins scientists show hallucinogen in mushrooms creates universal 'mystical' experience

To lessen the former, each subject met several times, before drug sessions began, with a reassuring "monitor," a medical professional experienced in observing drug study participants. Monitors stayed with them during the capsule-taking sessions. Actual trials took place in a room outfitted like a comfortable, slightly upscale living room, with soft music and indirect, non-laboratory lighting. Heart rate and blood pressure were measured throughout.

The researchers countered "expectancy" by having both monitors and subjects "blinded" to what substance would be given. For ethical reasons, subjects were told about hallucinogens' possible effects, butalso learned they could, instead, get other substances-weak or strong-that might change perception or consciousness. Most important, a third "red herring" group of six subjects had two blinded placebo sessions, then were told they'd receive psilocybin at a third. This tactic-questionnaires later verified-kept participants and monitors in the dark at the first two sessions about each capsule's contents.

Nine established questionnaires and a new, specially createdfollowup survey were used to rate experiences at appropriate times in the study. They included those that differentiate effects of psychoactive drugs, that detect altered states of consciousness, that rate mystical experiences and assess changes in outlook.

The study, Griffiths adds, has advanced understanding of hallucinogen abuse.

As for where the work could lead, the team is planning a trial of patients suffering from advanced cancer-related depression or anxiety, following up suggestive research several decades ago. They're also designing studies to test a role for psilocybin in treating drug dependence.