Review Question - QID 214838

A 45-year-old man presents to the emergency department with hiccups. He states they have gone on for the past 48 hours and have not improved despite drinking cold water and holding his breath. The patient has a past medical history of anxiety and depression and is currently taking fluoxetine. He is also concerned that he is dehydrated and has been drinking more water recently to stay hydrated. His temperature is 98.0°F (36.7°C), blood pressure is 121/81 mmHg, pulse is 83/min, respirations are 16/min, and oxygen saturation is 98% on room air. Physical exam reveals a man who is actively hiccupping. His abdomen is non-tender and he otherwise appears well. Laboratory studies are ordered as seen below.

Hemoglobin: 15 g/dL
Hematocrit: 45%
Leukocyte count: 6,600/mm^3 with normal differential
Platelet count: 295,040/mm^3

Serum:
Na+: 129 mEq/L
Cl-: 100 mEq/L
K+: 4.0 mEq/L
HCO3-: 24 mEq/L
BUN: 20 mg/dL
Glucose: 110 mg/dL
Creatinine: 1.0 mg/dL
Ca2+: 9.8 mg/dL

Which of the following is the most appropriate management of this patient?