Correct Answer: C

Rationale: The correct instruction for a client prescribed methotrexate is to avoid sunlight while taking this medication. Methotrexate can increase sensitivity to sunlight, leading to skin reactions, so clients should limit sun exposure and use protective measures like sunscreen and clothing coverage to prevent adverse effects.

Correct Answer: D

Rationale: Administering iodine one hour before PTU is crucial to ensure proper absorption and effectiveness of PTU. This timing helps optimize the therapeutic benefits of PTU by allowing it to be absorbed efficiently without interference from iodine, ultimately leading to better treatment outcomes for the patient.

Correct Answer: B

Rationale: The highest priority for the PN is to assess the rate and depth of the client's respirations when a client is receiving morphine via a PCA pump. Respiratory depression is a life-threatening side effect of intravenous morphine administration. If the client's respiratory rate falls below 10 breaths/min, the PCA pump should be stopped, and the healthcare provider must be notified immediately to prevent further complications.

Correct Answer: A

Rationale: When a client with a history of deep vein thrombosis is prescribed rivaroxaban, the nurse should monitor for signs of bleeding as rivaroxaban increases the risk of bleeding. Common adverse effects of rivaroxaban include bleeding events, such as easy bruising, prolonged bleeding from cuts, or blood in the urine or stool. It is crucial for the nurse to assess for these signs to prevent complications and ensure the client's safety.

Correct Answer: C

Rationale: Erythropoietin is prescribed to stimulate the production of red blood cells. Clients undergoing hemodialysis often develop anemia due to end-stage renal disease. Erythropoietin helps in correcting this anemia by stimulating red blood cell production. It is not used to prevent infections associated with dialysis, deep vein thrombosis, or to balance phosphorus levels in the body.