1. A 52-year-old wom an was adm itted to the hospital w ith a 1-w eek history of m uscle cram ps, lethargy, and confusion. Past history of the patient was signi cant for depression treated w ith am itript yline. Vital signs on adm ission w ere blood pressure 134/82 m m Hg (w ith no signi cant changes upon standing); heart rate 85 bpm ; respirations 14/m in. Physical exam ination was unrem arkable. Pertinent lab test results on adm ission were serum Na+ 118 m Eq/L (norm al 136-145 m Eq/L); serum osm olality 220 m Osm /kg (norm al 275-295 m Osm /kg); urine osm olality 950 m Osm /kg (norm al 50-1400 m Osm /kg). A diagnosis was m ade, and an appropriate therapy was prescribed. Which of the follow ing drugs was m ost likely included in the patient’s treatm ent? A. Mannitol B. Triam terene C. Conivaptan D. Acetazolam ide E. Hydrochlorothiazide F. Furosem ide