Q. A 35-year-old male is transported to the emergency department after intentionally ingesting approximately 30 tablets of an unknown medication in an apparent suicide attempt. He states that he has been feeling depressed for the past month and has been having recurrent thoughts of harming himself. Currently, he reports “ringing in his ears”, shortness of breath, and abdominal pain. He denies any previous suicide attempts or mental health treatment. On physical examination, his temperature is 37 degrees Celsius (98.6 degrees Fahrenheit), blood pressure 150/100 mm Hg, heart rate 110/min, respiratory rate 30/min, and oxygen saturation 96 percent on room air. He is alert and protecting his airway, but appears anxious and agitated. There are no obvious signs of trauma. His pupils are equal, round, and reactive to light, cardiac exam is normal other than tachycardia, and his lungs are clear to auscultation bilaterally. The patient is speaking in full sentences, but is somewhat difficult to understand due to slurred speech. You order the patient to be given activated charcoal (1 gm/kg orally) and intravenous fluids. You also start him on a proton pump inhibitor to protect his gastrointestinal tract from the effects of the medication. A STAT complete blood count is within normal limits, and his liver function enzymes are also normal. An arterial blood gas (ABG) is performed at the bedside in the emergency department with the following results: pH: 7.30 pCO2: 40 mm Hg HCO3: 15 mEq/L Anion Gap (calculated): 18 mmol/L O2 saturation: 97% Based on the information you have at this point, which of the following is the best therapeutic intervention in this clinical scenario?