A nurse is caring for a client who needs to be awakened for the administration of an oral medication. Which of the following findings should indicate to the nurse that the client was in stage 3 of the sleep cycle when awakened?

A. Hyperactivity is not a common adverse effect of OTC sleep aids. These medications, which often contain antihistamines such as diphenhydramine, are generally sedating rather than stimulating, and they are more likely to cause drowsiness, grogginess, or confusion, especially in older adults.

B. Diarrhea is not typically associated with OTC sleep aids. While gastrointestinal upset can occasionally occur with any medication, diarrhea is not a characteristic or common adverse effect of these sedating agents.

C. Excessive salivation is not commonly seen with OTC sleep aids. In fact, antihistamine-containing sleep aids more often cause dry mouth rather than increased salivation due to their anticholinergic effects.

D. Urinary retention is a potential adverse effect of OTC sleep aids that contain antihistamines. Anticholinergic properties of these medications can reduce bladder detrusor muscle activity, making it difficult for clients to empty the bladder. This effect is particularly concerning in older adults or clients with preexisting urinary issues such as benign prostatic hyperplasia.

A. Central sleep apnea (CSA) occurs when the brain fails to send appropriate signals to the muscles that control breathing during sleep. Common causes include opioid overdose, congestive heart failure, and neurologic conditions that affect the respiratory centers. The key characteristic is the absence of respiratory effort, distinguishing CSA from obstructive forms.

B. Obesity and an inactive tongue are risk factors for obstructive sleep apnea (OSA), not central sleep apnea. OSA results from upper airway collapse during sleep, not central nervous system failure.

C. While polysomnography is the standard diagnostic tool for sleep apnea, CSA is not “easily diagnosed” because it can be intermittent and requires careful analysis of respiratory effort and airflow patterns to differentiate from OSA.

D. Recurrent episodes of upper airway collapse and obstruction describe obstructive sleep apnea, not central sleep apnea. CSA involves a lack of respiratory drive rather than physical obstruction of the airway.