A few hallucinogens come from natural sources, such as mescaline from the peyote cactus and psilocybin, which is the hallucinogenic agent in so-called magic mushrooms. Others, such as LSD, MDA (methylenedioxyamphetamine) and Ecstasy (methylenedioxymethamphetamine - or MDMA) are either entirely synthetic or semi-synthetic. For example, LSD is derived from a fungus that grows on rye grains but requires very substantial chemical processing to produce.
Where natural materials have been refined to a large degree, such as in the production of mescaline, the end product can take a variety of forms, including liquid, tablet or capsule.
Synthetic or semi-synthetic hallucinogens are produced as tablets, capsules or liquids (dropped on blotting paper, sugar cubes or gelatine sheets). When produced in tablet form, LSD - and particularly Ecstasy - are often manufactured with a coloured or impressed logo upon them. This can take the form of a cartoon character etc. - the better to appeal to young people.
LSD, in contrast, is far more potent (about 100 times stronger) and its effects can include very vivid visual and audial hallucinations - almost literally an out of body experience - combined with distortion of time, distance and personal integrity. This can be terrifying, as a user will be unable to control his or her thought processes and any unpleasant aspects of the 'trip' can lead to intense fear, anxiety and even psychosis.
Hallucinogens such as MDA or MDMA (Ecstasy) are midway between these two extremes in terms of potency. Some distortion of vision and perception may occur but not in the intense and uncontrollable manner as can happen with LSD.
Click on these links to view specific information about Ecstasy, LSD or hallucinogenic mushrooms.