What is a common use of stimulants in a clinical setting?

Stimulants are often utilized in clinical settings primarily to treat conditions such as narcolepsy and attention-deficit hyperactivity disorder (ADHD). Narcolepsy is a sleep disorder characterized by excessive daytime sleepiness, and stimulants help to increase alertness and reduce the frequency of sleep attacks. Similarly, in individuals with ADHD, stimulants can improve attention span, focus, and impulse control by increasing the levels of certain neurotransmitters in the brain, which enhances cognitive function and behavioral regulation.

The other options do not reflect the typical clinical uses of stimulants. For instance, stimulants would not be used to enhance relaxation or promote weight gain; in fact, they are more likely to have the opposite effect. Additionally, stimulants can raise blood pressure rather than decrease it, aligning their effects more with increased energy and alertness rather than relaxation or lower blood pressure.