Correct Answer: A

Rationale: Filgrastim is a medication used to stimulate the production of white blood cells, specifically neutrophils, to increase the white blood cell count. This increase in white blood cells helps reduce the risk of infections in clients with neutropenia, a condition characterized by low levels of neutrophils.

Correct Answer: C

Rationale: Loop diuretics, like Furosemide, can increase the risk of Digoxin toxicity by causing hypokalemia. Hypokalemia enhances the toxic effects of Digoxin on the heart, leading to an increased risk of Digoxin toxicity.

Correct Answer: A

Rationale: Alendronate should be taken with a full glass of water after getting up in the morning to reduce the risk of esophageal irritation. Remaining upright for at least 30 minutes after ingestion is essential to prevent esophageal irritation and ensure proper absorption of the medication.

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: C

Rationale: Nafcillin is an appropriate alternative within the penicillin class for clients who have difficulty swallowing tablets or struggle with liquid or chewable medications. It is available for intramuscular (IM) or intravenous (IV) administration, offering options beyond oral formulations.