This document discusses different types of hallucinogenic drugs. It begins by explaining terms used to describe hallucinogens and describes two main classes: classical phantastica like LSD and psilocybin that alter perceptions while allowing users to remain grounded in reality, and deliriants like PCP that cause greater mental confusion and loss of touch with reality. It then provides details on specific hallucinogenic drugs like their effects, history of use, and regulations. The document aims to inform by describing various hallucinogens, how they are used, and their perceived effects and risks.