A nurse is educating a client who is experiencing sleep disturbances and desires to decrease caffeine intake. Which of the following beverages should the nurse recommend?

A) Pain level:
While assessing pain is important to determine the effectiveness of the pain management, it is not the immediate priority after administering an opioid.

B) Pulse oximetry:
Monitoring oxygen saturation is critical as opioids can depress respiratory function. However, it is indirectly related to the primary effect of the medication on the central nervous system.

C) Blood pressure:
Monitoring blood pressure is important as opioids can cause hypotension, but it is not as critical as monitoring the level of sedation and respiratory status.

D) Level of sedation:
This is the priority because opioids can cause significant sedation and respiratory depression. Assessing the level of sedation helps determine if the client is at risk of further complications like respiratory arrest. Over-sedation can be a precursor to more serious complications, making this assessment crucial.

A) Headache:
Clients with obstructive sleep apnea often experience morning headaches due to the intermittent hypoxia and hypercapnia that occur during episodes of apnea. These headaches are typically described as dull and diffuse and may improve throughout the day.

B) Nausea:
While gastrointestinal symptoms such as nausea can occur in some individuals with sleep apnea, it is not a typical or specific finding associated with this condition. Nausea may result from other causes, such as medication side effects or underlying gastrointestinal issues, rather than directly from obstructive sleep apnea.

C) Hypotension:
Obstructive sleep apnea is more commonly associated with hypertension rather than hypotension. The recurrent episodes of hypoxemia and sympathetic nervous system activation during apneic episodes can lead to systemic hypertension over time.

D) Constipation:
Constipation is not a typical finding associated with obstructive sleep apnea. While sleep apnea may contribute to fatigue and alterations in gastrointestinal motility in some individuals, constipation is not a direct consequence of this sleep disorder.