Which of the following is a possible consequence of CNS depressant abuse?

The correct answer highlights that respiratory depression is a significant consequence of CNS (central nervous system) depressant abuse. CNS depressants work by slowing down brain activity, which can lead to diminished respiratory function. When these substances are misused or taken in large doses, they can inhibit the body's natural drive to breathe, leading to dangerously low levels of oxygen in the bloodstream. This serious condition can result in a range of health complications, including shallow or ineffective breathing, and in extreme cases, can be life-threatening.

In contrast, the other options do not accurately reflect the effects of CNS depressant abuse. For example, increased energy levels is typically associated with stimulants, not depressants. Hallucinations can occur with certain drugs but are more common with hallucinogens or stimulants rather than CNS depressants. Memory enhancement is also not a characteristic of CNS depressant abuse; in fact, these substances can lead to memory impairment and cognitive dysfunction instead. This context helps clarify that while depressant abuse can lead to various effects, respiratory depression is one of the most critical and dangerous consequences.