every second middle class kid was opening the doors of perception and [ab]using hallucinogenic drugs.“(Lycaeum-drug archives)
The hallucinogenic mushrooms have been used for thousands of years, and the use of them is just continuing. CHEMICAL STRUCTURE
The primary active ingredients of Psilocybe mushrooms are (surprise!) psilocybin and psilocin, and to a lesser extent baeocystin and norbaeocystin. The ratio of psilocybin to psilocin varies from species to species. The primary difference is that psilocin is unstable and it breaks down when the mushroom is dried, while psilocybin lasts much longer (a 115-year old mushroom sample was found to contain some). The two are equally psychoactive, since one molecule of psilocybin breaks down into one molecule of psilocin. But in terms of weight, we find that:
molecular weight of psilocybin

molecular weight of psilocin = 284.3

204.3 = 1.391

So by weight psilcibin is aboat1.4 times potent.
The effects of psilocybin can be potentiated (made stronger) by taking them with a monoamine oxidase inhibitor (MAOI). The potency is roughly doubled, according to most reports. The best known MAOIs are harmine and harmaline from the plant Peganum harmala (Syrian rue). (Lycaeum-drug archives)

INFLUENCES ON THE HUMAN PSYCHE
"...a psychedelic drug is one which, without causing physical addiction, craving, major physiological disturbances, delirium, disorientation, or amnesia, more or less reliably produces thought, mood, and perceptual changes otherwise rarely experienced exept in dreams, contemplarive and religious exaltation, flashes of vivid involuntary memory, and acute psychoses."( Lester Grinspoon)
Psilocybin is fine. By comparing three psychoactive drug hash, LSD-25 and psilocybin yuo will find out, that Hash usually does not do much. It sends into a half sleep with silly thoughts .. LSD does not do it either. It's probably OK after low dose recreation -- partying and such.. High doses --is too blunt, like a mental power tool. Trip on LSD is too long and makes the user very tired - physically and mentally. But psilocybin, is fine. It is direct from the mother earth, forgiving, gentle substance. It is a product of the nature, untied to the actions of men and women roaming this planet. Six hours -- not too short, not too long. Perfect.(Timothy Leary, Ph.D.)
It should be noted that like all 'major' hallucinogens, psilocybin can precipitate psychotic episodes and uncover or aggravate previous mental illness. If you are stressed out or depressed, do not take mushrooms; if you have schizophrenia or something, DO NOT take mushrooms. „ACID IS NOT FOR EVERY BRAIN ...