Correct Answer: A

Rationale: Warfarin is classified as an anticoagulant, which means its primary function is to prevent the formation of blood clots. By inhibiting the synthesis of certain clotting factors in the liver, warfarin reduces the blood's ability to clot, making it an important medication in preventing conditions like strokes and deep vein thrombosis.

Correct Answer: D

Rationale: Clients prescribed furosemide are at risk for orthostatic hypotension, a sudden drop in blood pressure when changing positions. Advising the client to stand up slowly can help prevent this complication. Instructing the client to avoid rapid position changes decreases the likelihood of dizziness or fainting episodes.

Correct Answer: B

Rationale: Clients taking warfarin should report any signs of bleeding to their healthcare provider as it can indicate excessive anticoagulation. Bleeding can be a serious side effect of warfarin and should be promptly addressed by a healthcare provider to prevent complications.

Correct Answer: A

Rationale: The correct answer is to advise the client to avoid consuming foods high in vitamin K. Warfarin's effectiveness can be affected by vitamin K intake. Clients should maintain a consistent intake of vitamin K and avoid sudden increases in foods high in vitamin K to ensure the medication works properly and consistently.

Correct Answer: B

Rationale: The correct answer is B. Loperamide can cause drowsiness and dizziness, so clients should avoid activities that require alertness until they know how the medication affects them. Taking the medication with a full glass of water can help with absorption. Increasing high-fiber foods is not directly related to Loperamide, and black, tarry stools are not expected side effects of this medication.