Correct Answer: A

Rationale: The correct instruction for the nurse to include in the discharge teaching for a client prescribed Warfarin is to 'Avoid foods high in vitamin K.' Foods high in vitamin K can decrease the effectiveness of Warfarin by interfering with its anticoagulant effects, potentially leading to blood clotting issues. It is crucial for clients on Warfarin therapy to maintain a consistent intake of vitamin K-containing foods to ensure the stability of the medication's effects.

Choices B, C, and D are incorrect because taking Warfarin with food, monitoring heart rate daily, or limiting fluid intake are not directly related to optimizing the effectiveness of Warfarin therapy.

Correct Answer: B

Rationale: The correct instruction for a client prescribed Ciprofloxacin is to avoid direct sunlight. Ciprofloxacin can cause photosensitivity, increasing the risk of sunburn. Clients should be advised to avoid direct sunlight and wear protective clothing, including hats and sunglasses when going outdoors to prevent skin damage.

Choices A, C, and D are incorrect. Taking Ciprofloxacin with an antacid can reduce its absorption, so they should not be taken together. Increasing dairy product intake is not necessary or relevant to taking Ciprofloxacin. While Ciprofloxacin can discolor urine, turning it orange, this is not a critical side effect that requires specific instructions for the client.

Correct Answer: C

Rationale: Enoxaparin should be administered subcutaneously at a 45- to 90-degree angle. This angle ensures proper delivery of the medication. Massaging the injection site should be avoided to prevent bruising and possible tissue damage. Aspiration is not required for subcutaneous injections like Enoxaparin.
Therefore, the correct action for administering Enoxaparin is to insert the needle at a 45- to 90-degree angle.

Correct Answer: A

Rationale: The correct action for the nurse is to infuse IV Acyclovir over at least 1 hour to prevent nephrotoxicity. Rapid infusion can lead to adverse effects, so a slow infusion rate is crucial for patient safety. Monitoring blood pressure, administering a stool softener, or monitoring blood glucose levels are not directly related to the administration of IV Acyclovir for Herpes Zoster.

Correct Answer: B

Rationale: Pharmacodynamics refers to the drug's actions at receptor sites and the physiological, chemical, and behavioral effects produced by these actions. It involves understanding how drugs interact with the body at the molecular level to produce their effects, including mechanisms of action, receptor binding, and downstream physiological responses.
Choice A is incorrect because it describes pharmacopeia, which is a reference book containing standards for drugs.
Choice C refers to efficacy, which is the maximum effect a drug can produce.
Choice D describes pharmacokinetics, which focuses on the movement of drugs within the body.