Which adverse effect should the nurse monitor for when assessing a client on a CNS depressant?

• A. Excessive Sedation
• B. Insomnia
• C. Weight gain
• D. Hyperactivity

Answer: (A)

When a client is taking a CNS depressant, the primary safety concern is excessive sedation. These drugs slow brain activity, so monitoring for pronounced drowsiness, trouble awakening, slowed speech, impaired coordination, or slowed or shallow breathing helps catch the risk of respiratory depression and airway compromise early. Regular assessment of level of consciousness and respirations guides timely actions, such as adjusting dosing or withholding the medication if needed. Insomnia is not what we expect with a CNS depressant—in fact, sleepiness is more typical. Weight gain and hyperactivity are not the immediate safety concerns tied to these medications in the acute setting.