Correct Answer: C

Rationale: The correct action the nurse should plan to take when administering Propranolol to a client with dysrhythmia is to assist the client when transitioning to a sitting or standing position. Propranolol can cause orthostatic hypotension, leading to dizziness during position changes, so it is essential to help the client move slowly to prevent falls or injuries.

Correct Answer: A

Rationale: Before starting Calcitonin-salmon, it is important to assess for any potential allergies as anaphylaxis can occur. A skin test is usually conducted to determine if the client is allergic to the medication. The nurse should also inquire about any previous allergies to fish, as Calcitonin-salmon is derived from salmon.

Correct Answer: B

Rationale: The correct answer is to monitor the client's potassium levels. Hypokalemia can increase the risk of Digoxin toxicity. Potassium levels should be closely monitored to prevent adverse effects.

Correct Answer: D

Rationale: The correct instruction is to apply the Nitroglycerin transdermal patch to a hairless area of skin. This is important for proper absorption of the medication. Additionally, rotating the patch to different sites each day helps prevent skin irritation and ensures optimal therapeutic effect. Applying the patch to the same site each day can lead to skin irritation or tolerance development. Removing the patch at night is not necessary as the patch is typically worn continuously to provide a consistent level of medication. Covering the patch with a heating pad is contraindicated as it can increase drug absorption, potentially leading to adverse effects.

Correct Answer: B

Rationale: Repaglinide causes a rapid, short-lived release of insulin. It is crucial for the client to take this medication 15-30 minutes before each meal to synchronize the peak insulin availability with mealtime glucose elevation, maximizing its effectiveness in controlling blood sugar levels.