Correct Answer: D

Rationale: The correct answer is D because Raltegravir works by blocking the integrase enzyme, preventing the virus from integrating its genetic material into the host cell's DNA. This action inhibits viral replication within the host cell, making it an essential mechanism of action for managing viral infections.

Correct Answer: D

Rationale: Erectile dysfunction drugs are contraindicated with Nitroglycerin because they can potentiate the hypotensive effects of Nitroglycerin, leading to severe hypotension.

Correct Answer: D

Rationale: Nitroglycerin acts by dilating the coronary arteries, leading to increased blood flow and oxygen supply to the heart. This helps in relieving angina symptoms by reducing the heart's workload and improving blood supply to the myocardium.

Correct Answer: A

Rationale: Propranolol is contraindicated in clients with a history of asthma because it can cause bronchospasms due to its non-selective beta-blocking properties. By blocking beta-2 receptors in the lungs, propranolol can lead to bronchoconstriction, potentially triggering asthma symptoms and exacerbating respiratory issues. It is essential for individuals with asthma to avoid medications like propranolol that can worsen their condition.

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.