What is a primary characteristic of CNS depressants?

The primary characteristic of CNS (central nervous system) depressants is that they have a high potential for psychological dependence. This class of substances, which includes alcohol, benzodiazepines, and barbiturates, works by slowing down brain activity, leading to effects such as relaxation, sedation, and reduced anxiety.

The potential for psychological dependence arises because individuals may start using these substances to escape stress or anxiety, leading to a cycle of increased usage as tolerance develops. Over time, users may find themselves needing the substance to function normally, contributing to dependence.

While some CNS depressants can be used in emergency settings or may have cognitive effects in certain contexts, their primary function revolves around depressing central nervous system activity. Thus, the correlation with psychological dependence is the most significant characteristic that underlines the risks associated with their use.