Substances that alter sensory perception and can cause hallucination-like effects, including LSD, mescaline, psilocybin, MDMA, PCP, and ketamine, are categorized as which type?

• A. Depressants/Sedative-hypnotics
• B. Stimulants
• C. Hallucinogens/Dissociatives
• D. Cannabinoids/cannabinols

Answer: (C)

Substances that alter sensory perception and can cause hallucination-like experiences fall into the hallucinogens/dissociatives category. Classic psychedelics such as LSD, mescaline, and psilocybin produce vivid changes in vision, sound, thought, and sense of time, often with profound shifts in mood. Ketamine and PCP are dissociatives that disrupt normal perception and can create a sense of detachment from self or surroundings. MDMA can also significantly alter perception and emotional experience at higher doses, so it’s grouped with drugs that affect perception in many educational contexts. In contrast, depressants slow brain activity, stimulants increase energy without producing the same perceptual distortions, and cannabinoids alter mood and perception differently, so they don’t fit this description as well.