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The danger of LSD is that its effects are unpredictable.

A bad trip can be very unpleasant and frightening. LSD users call their hallucinogenic experiences 'trips.' Depending on how much you take and how your brain responds, a trip may be 'good' or 'bad.'Ī good trip may be stimulating and pleasurable.

Only a tiny amount is needed to cause hallucinations. These are things that you see, hear, or feel while awake that appear to be real, but instead of being real, they have been created by the mind. These are substances that cause hallucinations. LSD is in a class of drugs called hallucinogens. Serotonin helps control behavior, mood, the senses, and thinking. LSD affects the action of a brain chemical called serotonin. This means it acts on your brain (central nervous system) and changes your mood, behavior, and the way you relate to the world around you.

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