What symptoms are indicative of intoxication by depressant drugs?

The symptoms indicative of intoxication by depressant drugs include slurred speech and loss of motor coordination. Depressants, such as alcohol and benzodiazepines, work by slowing down the central nervous system, which can impair cognitive functions and physical abilities. As a result, individuals under the influence of these substances may exhibit difficulties in speaking clearly, leading to slurred speech. Additionally, the impairment of motor skills can result in a lack of coordination, making it challenging for individuals to perform tasks that require physical precision, such as walking or driving.

In contrast, the other choices represent effects that are typically associated with stimulants or other drug classifications, which can lead to increased energy, heightened alertness, and rapid heartbeat. Thus, the correct identification of slurred speech and loss of motor coordination as symptoms of depressant drug intoxication is crucial for recognizing the effects of such substances.