A 74-year-old woman presented to the operating room for drainage of an L3–4 abscess. She had undergone several irrigation and debridement procedures of multiple joints the day before. Several weeks prior to hospital admission, she had undergone a 14-day antibiotic treatment for a staphylococcus bacteremia and pyelonephritis, initially with vancomycin, then with ticarcillin/clavulanic acid and levofloxacin. The patient’s home medications included rabeprazole, alendronate, hydrochlorothiazide, celecoxib, digoxin, and propranolol. Additional medications administered in the hospital were morphine, oxycodone, and subcutaneous heparin. She was allergic to sulfur and pneumococcal vaccine. She did not smoke or drink alcohol.