A nurse is providing instruction to a new nurse about caring for clients who are receiving diuretic therapy to treat heart failure. The nurse should explain that which of the following medications puts clients at risk for both hyperkalemia and hyponatremia?

A) Calcium gluconate 1.5 grams IV now: Calcium gluconate is administered to counteract the effects of hyperkalemia by stabilizing the myocardial cell membrane. It does not lower potassium levels but helps protect the heart from potential dysrhythmias associated with high potassium levels.

B) Dextrose 50% injection (50ml) IV push now: Dextrose 50% injection, also known as D50W, is administered to temporarily shift potassium from the extracellular space into the intracellular space, thereby lowering serum potassium levels. It is commonly used in combination with insulin to facilitate the movement of potassium into cells.

C) Colace 100 mg PO now: Colace is a stool softener and does not affect serum potassium levels. It is not indicated for the treatment of hyperkalemia.

D) Regular insulin 10 units IV now: Regular insulin is administered with dextrose to facilitate the movement of potassium from the extracellular space into the intracellular space. Insulin stimulates the cellular uptake of glucose, which in turn drives potassium into cells along with glucose.

E) Potassium chloride 20 mEq orally now: Potassium chloride is contraindicated in the treatment of hyperkalemia as it would further increase serum potassium levels. It is typically used to supplement potassium in clients with hypokalemia, not hyperkalemia.

A) Bright light: Exposure to bright light, especially in the evening or at night, can interfere with the body's production of melatonin, a hormone that regulates the sleep-wake cycle. Bright light exposure can disrupt circadian rhythms, making it more challenging to fall asleep and stay asleep.

B) Drinking caffeinated beverages in the evening: Caffeine is a stimulant that can interfere with sleep by blocking the effects of adenosine, a neurotransmitter that promotes sleepiness. Consuming caffeinated beverages in the evening can delay the onset of sleep and reduce overall sleep duration.

C) A 20-minute nap during the day: While short naps can be beneficial for some individuals, especially if they are sleep-deprived, napping for too long or too late in the day can disrupt the body's natural sleep-wake cycle. Short naps can be refreshing, but longer or late-day naps can make it harder to fall asleep at night.

D) Emotional stress: Stress and anxiety can trigger the body's "fight or flight" response, leading to increased alertness and difficulty relaxing or falling asleep. Chronic stress can disrupt the sleep-wake cycle, leading to difficulty initiating or maintaining sleep and resulting in poor sleep quality.

E) A regular bedtime schedule: Having a consistent bedtime schedule can actually help regulate the sleep-wake cycle by reinforcing the body's internal clock. Going to bed and waking up at the same time each day, even on weekends, can help improve sleep quality and make it easier to fall asleep and wake up naturally.