Psychedelics are a class of psychoactive substances that induce profound alterations in perception, mood, and cognitive processes. They are known for generating unique experiences, often characterized by visual and auditory hallucinations, altered states of consciousness, and feelings of interconnectedness or spiritual insight. Historically used in cultural and spiritual practices, modern research is exploring their therapeutic potential for conditions like depression, PTSD, and addiction, sparking a resurgence of interest in their profound effects on the mind.