Correct Answer: D

Rationale: Anorexia is a common manifestation of digoxin toxicity, along with symptoms such as blurred vision, stomach pain, and diarrhea. It is important for healthcare providers to recognize these signs to prevent serious complications.

Correct Answer: C

Rationale: Oprelvekin is a medication that stimulates platelet production. Therefore, monitoring the platelet count is essential to assess the effectiveness of this drug. The expected outcome for oprelvekin therapy is a platelet count greater than 50,000/mm^3. Changes in platelet count can indicate the response to the medication and help in adjusting the treatment plan accordingly.

Correct Answer: A

Rationale: A persistent dry cough is a common adverse effect of Enalapril, which is an ACE inhibitor. Enalapril can cause the accumulation of bradykinin, leading to cough. If the client experiences a persistent dry cough, it is essential to notify the healthcare provider for further evaluation and possible medication adjustment.

Correct Answer: B

Rationale: The correct instruction for a client with a new prescription for Simvastatin is to avoid drinking grapefruit juice. Grapefruit juice can inhibit the metabolism of Simvastatin, leading to increased blood levels of the drug and a higher risk of adverse effects such as muscle pain and liver damage. It is important to educate the client about this potential interaction to ensure the safe and effective use of the medication.

Correct Answer: C

Rationale: The nurse should monitor the hematocrit level to evaluate the effectiveness of Epoetin Alfa therapy. Epoetin Alfa stimulates red blood cell production, leading to an increase in hematocrit levels. Monitoring the hematocrit helps assess the response to therapy and ensures that the medication is effectively addressing the anemia.