Which of the following is a common side effect of CNS stimulants?

CNS stimulants are medications or substances that enhance the activity of the central nervous system. One of the hallmark side effects associated with the use of these stimulants is insomnia. This occurs because stimulants increase the levels of neurotransmitters such as dopamine and norepinephrine in the brain, which can elevate alertness and wakefulness. While this heightened state can be beneficial for concentration and focus, it can also disrupt normal sleep patterns, leading to difficulties in falling asleep or staying asleep.

Understanding the nature of CNS stimulants is crucial in recognizing how they impact the body. Unlike many other classes of drugs that might promote fatigue or increase appetite, CNS stimulants are designed to provide an energizing effect. Insomnia is a common complaint among users, and it's important for healthcare providers to monitor this side effect, as it can lead to further issues such as decreased performance, mood disturbances, and overall quality of life. Thus, identifying insomnia as a side effect is essential for managing the use of CNS stimulants effectively.