Correct Answer: A

Rationale: Bradycardia is a common sign of Digoxin toxicity. Digoxin can lead to toxicity, which can manifest as various signs and symptoms, including bradycardia. Monitoring the client's heart rate closely is crucial to detect and manage potential toxicity early.

Correct Answer: C

Rationale: Regular insulin, also known as short-acting insulin, typically exhibits a peak effect around 1 to 5 hours following administration. This rapid onset and peak effect make it suitable for managing postprandial glucose levels. In contrast, Insulin glargine is a long-acting insulin with no pronounced peak effect, NPH insulin has an intermediate duration of action, and Insulin lispro is a rapid-acting insulin that peaks within 30 minutes to 2.5 hours after administration.

Correct Answer: A

Rationale: Spironolactone is a potassium-sparing diuretic, which can lead to hyperkalemia as an adverse effect. Hyperkalemia can result in muscle weakness and cardiac dysrhythmias, making it essential for the nurse to monitor potassium levels closely when a client is on Spironolactone.

Correct Answer: A

Rationale: To calculate the volume to administer, use the formula: Desired dose / Concentration = Volume to administer. In this case, (15,000 units / 20,000 units/mL) = 0.75 mL, which is rounded up to 0.8 mL. Therefore, the correct answer is 0.8 mL.

Correct Answer: C

Rationale: Methylnaltrexone is an opioid antagonist used to treat severe constipation unrelieved by laxatives in opioid-dependent clients. It blocks the mu opioid receptors in the GI tract, helping to alleviate constipation without affecting pain relief or causing withdrawal symptoms.