Review Question - QID 104296

A 25-year-old woman presents to the emergency department with nausea and vomiting. She denies any recent illnesses, sick contacts, or consumption of foods outside of her usual diet. She reports smoking marijuana at least three times a day. She has no medical conditions and takes no prescription or over-the-counter medications. Her temperature is 97.7°F (36.5°C), blood pressure is 90/74 mmHg, pulse is 100/min, respirations are 10/min, and SpO2 is 94% on room air. Her conjunctiva are injected and she continues to have episodes of wretching and vomiting, but physical exam is otherwise normal. Her basic metabolic panel is obtained below.

Serum:
Na+: 132 mEq/L
Cl-: 89 mEq/L
K+: 2.9 mEq/L
HCO3-: 30 mEq/L
BUN: 35 mg/dL
Glucose: 80 mg/dL
Creatinine: 1.5 mg/dL
Magnesium: 2.0 mEq/L

Which of the following is the next best step in management?