Correct Answer: A

Rationale: The correct instruction for a client starting Warfarin is to monitor for signs of bleeding. Warfarin is an anticoagulant that increases the risk of bleeding; therefore, it is crucial for the client to watch for any signs of bleeding, such as easy bruising, prolonged bleeding from cuts, blood in urine or stools, or unusual bleeding from gums or nose. If any of these signs occur, the client should promptly report them to their healthcare provider for further evaluation and management. Choices B, C, and D are incorrect because avoiding foods high in vitamin K is related to other medications like Coumadin, increased urination is not a common side effect of Warfarin, and taking Warfarin with an antacid can potentially interfere with its absorption.

Correct Answer: C

Rationale: When a nurse detects a hematoma at the IV catheter insertion site, applying warm compresses is beneficial as it can promote healing by enhancing circulation and reducing swelling. Elevating the client's arm helps in reducing edema, which can relieve pressure, pain, and further bleeding in the hematoma area. Stopping the infusion may be necessary in certain situations, but it is not a standard action for all hematoma cases. Applying alcohol to the insertion site is discouraged as it can cause irritation and may not aid in resolving the hematoma.

Correct Answer: C

Rationale: The correct statement the nurse should include in teaching the client is to take Etravirine at the same time every day. This ensures consistent blood levels and effectiveness of the medication. Consistent timing is essential to achieve optimal therapeutic effects and avoid missing doses. Choices A and B are incorrect because Etravirine should not necessarily be taken with or without food; it is more important to take it consistently. Choice D is incorrect as there is no need to take Etravirine at bedtime to prevent drowsiness.

Correct Answer: C

Rationale: When teaching a client about Calcitonin-Salmon for Osteoporosis, the nurse should include instructions to inject the medication subcutaneously or administer it intranasally. Option A is incorrect because Calcitonin-Salmon is not typically administered intramuscularly. Option B is incorrect because it is not meant to be swallowed. Option D is incorrect as nasal bleeding is not an expected side effect with this medication.

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.