A 21-year-old female presents to the office five days after being sexually assaulted. The patient was raped by a student at her college. Before discharge, the patient was given emergency contraception and prophylaxis against sexually transmitted infections. She states since starting the medications, she has developed a metallic taste. Which of the following drugs is most likely responsible for the patient's complaint? {Ans: Metronidazole}A 65-year-old man presents with a 4-hour history of progressively worsening left chest pain that radiates to his left neck. A history of present illness reveals minor episodes of transient chest pain over the last 6 months after climbing 2 flights of stairs or running. His past medical history includes hypertension, type 2 diabetes mellitus, and hyperlipidemia. His vital signs are oxygen saturation 98% on room air, respiratory rate 18 breaths/min, heart rate 91 bpm, blood pressure 131/91 mm Hg, and temperature 98.6 °F (37 °C). A 12-lead electrocardiogram (ECG) demonstrates ST depressions in leads V5, V6, and aVL. The patient is administered oxygen, morphine, nitroglycerin, and aspirin. What is the principle behind giving this patient nitroglycerin? {Ans: To dilate the venous system and decrease cardiac preload.}A 47-year-old woman presents with swelling in both knees,