Certified Prevention Professional (CPP) Practice Exam

The correct definition of "hallucinogens" is captured in the choice that states these substances alter perceptions, thoughts, and feelings. Hallucinogens are a class of drugs that significantly affect an individual's sensory perception and cognitive processes. When consumed, these drugs can lead to visual or auditory hallucinations, altered states of awareness, and profound changes in thought patterns and emotions. This characteristic distinguishes hallucinogens from other types of drugs that have different primary effects.

In contrast, the other options focus on different categories of substances. The first choice refers to performance-enhancing drugs, which are designed to improve physical capabilities, often used in sports and physical activities. The third option addresses analgesics or anxiolytics, which serve the primary function of reducing pain and anxiety, thus not altering perception as hallucinogens do. The last option relates to sedatives, which induce sleepiness and relaxation rather than altering perception in the profound way hallucinogens do. This context helps clarify why the correct definition specifically pertains to the ability of hallucinogens to modify perceptions and thought processes.