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One physical danger of taking the type of drugs described in the passage is that the user may ........... .
While many drugs speed up pr depress the central nervous system, there is a class of drugs that distorts
how we feel, hear, see, smell, taste and think. Called hallucinogens because users often hallucinate, or
experience non-existent sensation these drugs are also known as mind-bending drugs. Some
hallucinogens come from natural sources, examples of which are mescaline, psilocyhin, DMT and
marijuana. Others are made in laboratories. Of all drugs, synthetic and natural, the most powerful is
LSD, or lysergic arid diethylamide. Twenty micrograms, an almost infinitesimal amount, is sufficient
to produce a hallucinogenic effect. The most pronounced psychological effects induced by
hallucinogens are a heightened awareness of colours and patterns together with a slowed perception of
time and a distorted body image. Sensations may seem to "cross over", giving the user a sense of
"hearing" colours and "seeing" sounds. Users may also slip into a dreamlike state, indifferent to the
world around them and forgetful of time and place to such an extent that they may believe it possible
to step out of a window or stand in front of a speeding car without harm. Users may feel several
different emotions at once or swings wildly from one emotion to another. It is impossible to predict
what kind of experience a hallucinogen may produce. Frightening or even panic-producing
psychological reactions to LSD and similar drugs are common. Sometimes, taking a hallucinogen
leaves the user with serious mental or emotional problems, though it is unclear whether the drug
simply unmasks a previously disorder or actually produces it.