Four weeks after surgical repair of a congenital heart defect, the child experiences shortness of breath, temperature of 102, lethargy, and chest pain. Based on these symptoms, the nurse practitioner should consider prescribing:

Rationale: A. Warfarin is used for anticoagulation in certain cardiac conditions but is not the primary treatment for post-surgical infection. B. IV immune globulin is used for conditions like Kawasaki disease or immunodeficiencies, not typical post-operative infections. C. IV antibiotics should be considered because the child presents with fever, lethargy, chest pain, and shortness of breath four weeks after heart surgery, which are concerning for post-operative infection or bacterial endocarditis. Prompt initiation of IV antibiotics is critical to prevent serious complications. D. Aspirin may be indicated for anti-inflammatory or antiplatelet purposes in some cardiac conditions, but it does not treat infection.