Correct Answer: A

Rationale: The correct instruction is to remove the prior dose before applying a new one to prevent toxicity. Nitroglycerin ointment can cause adverse effects if accumulated doses are not removed. Rubbing the ointment until it's not visible or covering it with gauze may alter absorption. Applying it to the same area each time can lead to skin irritation or desensitization.

Correct Answer: C

Rationale: Clients prescribed with Captopril, an ACE inhibitor, are at risk of developing a persistent cough as a common adverse effect. It is essential for the client to inform their healthcare provider promptly if this side effect occurs to evaluate the need for a medication change or adjustment.

Correct Answer: D

Rationale: To minimize the risk of catheter embolism, it is crucial to avoid reinserting the needle into an IV catheter. This practice can potentially sever the end of the catheter, leading to catheter embolism. Proper insertion techniques, securement, and avoiding unnecessary manipulations of the catheter can help prevent this serious complication.

Correct Answer: A

Rationale: The correct answer is A because Etanercept can cause bone marrow suppression, so it is crucial to monitor blood counts regularly to detect any early signs of adverse effects.

Correct Answer: A

Rationale: The correct instruction for a client prescribed allopurinol is to drink 2 liters of water daily. This recommendation aims to reduce the risk of kidney stones, a potential side effect associated with allopurinol use. Adequate hydration helps prevent the formation of uric acid crystals in the kidneys, which can lead to kidney stones. Therefore, encouraging increased water intake is essential in the management of clients taking allopurinol.