Which of the following is NOT a common side effect of CNS depressants?

CNS depressants are substances that lower brain activity, leading to a range of effects primarily characterized by sedation and relaxation. The correct answer is increased energy because this effect is contrary to what is typically associated with CNS depressants. Instead, these substances often produce effects like drowsiness, relaxed inhibitions, and drunk-like behavior, which reflect the depressant nature of the drugs that slow down the central nervous system.

Relaxed inhibitions result from reduced anxiety and heightened feelings of sociability. Drowsiness is a hallmark effect, as these substances promote sleepiness and can even lead to sedation. Drunk-like behavior may mimic the effects of alcohol consumption, including impaired motor control and decreased judgment. In contrast, increased energy is typically linked to stimulants, which elevate mood and increase alertness, thus highlighting why it does not belong in the context of CNS depressant side effects.