A 20-year-old man, with a medical history significant for active intravenous drug user presents to emergency room complaining of persistent fever. Pertinent positive on physical examination are temperature of 39.3 C, multiple pink, painful nodules on the palmer surface of both hands and grade 3 pansystolic murmur on fourth left parasternal area. Three sets of blood culture are positive for methicillin-resistant staphylococcus aureus (MRSA). What is the drug of choice for this patient?