LSD (lysergic acid diethylamide) was first synthesized in 1938 by Swiss chemist Albert Hofmann and later became widely studied for its psychological effects. It played a significant role in both clinical research and cultural movements throughout the mid-20th century.
LSD is known for its long duration and its ability to significantly alter perception, cognition, and sensory experience. Individuals may experience visual distortions, enhanced pattern recognition, and shifts in thought processes. It can also amplify emotions and internal narratives, sometimes bringing clarity and at other times creating confusion. The length and intensity of the experience make preparation and integration especially important.