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Hallucinogens change the way you sense the world
around you. LSD is odorless, colorless, and tasteless. It can
be painted onto small squares of paper that people lick or
When you use LSD, your senses of space, distance, and
time become altered. People say they "hear"
colors or "see" sounds, but effects are
Once you go on an "acid trip," you can't
get off till the drug's done with you - in about 12
hours! Strange feelings and strong emotions are typical.
LSD can cause "bad trips" - users experience
panic, confusion, sadness, and scary images. Bad reactions
can occur even with the first use and a user may have
flashbacks, where a person experiences the feelings of
a bad trip even after the drug wears off. LSD affects
judgment and behavior may get out of control. The user may
find himself or herself in a dangerous situation.
Physical changes include dilated pupils, increased heart
, muscle twitches and shaking, sweating, sleeplessness, and
loss of appetite.
Updated and reviewed by:
Ryan L. Redman, MD
Date reviewed: August 2007
Originally reviewed by:
Robert B. Lembersky, MD
Note: All information is for educational purposes only. For specific medical advice,
diagnoses, and treatment, consult your doctor.
© 1995-2009 The Nemours Foundation/KidsHealth. All rights reserved.
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