Correct Answer: C

Rationale: Potassium 3.4 mEq/L is below the expected reference range and puts a client at risk for digoxin toxicity. Low potassium levels can lead to fatal dysrhythmias, especially in older clients taking Digoxin, as potassium plays a crucial role in the heart's electrical activity.

Correct Answer: C

Rationale: The correct answer is C: Sedation. Dextromethorphan can lead to sedation as an adverse effect. The nurse should advise the client to avoid activities that require alertness when taking this medication to prevent any potential harm. Monitoring for sedation is crucial to ensure the client's safety and well-being.

Correct Answer: A

Rationale: The correct answer is to increase the intake of potassium-rich foods. Prednisone can lead to potassium depletion; therefore, it is essential for clients to consume foods high in potassium such as bananas, oranges, and spinach to counteract this effect and maintain electrolyte balance.

Correct Answer: B

Rationale: Levofloxacin should not be taken with dairy products because calcium can interfere with the absorption of the medication. It is recommended to take Levofloxacin 1 hour before or 2 hours after consuming dairy products to ensure optimal absorption and effectiveness of the medication.

Correct Answer: D

Rationale: Enoxaparin is a medication that should be administered as a subcutaneous injection in the abdomen to prevent bleeding complications. Massaging the injection site after administration should be avoided to reduce the risk of local irritation or bleeding. Rotating injection sites between the arms and thighs is a good practice for some medications but not recommended for Enoxaparin, which should be consistently given in the abdomen for optimal absorption and to avoid complications.