Hallucinogens are a widely abused yet often misunderstood class of drugs that alter perception, thoughts, and sensory experiences, sometimes leading to vivid hallucinations. These substances fall into two main categories: classic hallucinogens, which primarily distort reality, and dissociative drugs, which also induce a sense of detachment from the body. They can be synthetic or naturally occurring, with varying legal status depending on the substance and location. Despite being perceived by some as less harmful than other illicit drugs, hallucinogens can be addictive and pose serious health risks when used repeatedly.