Review Question - QID 109551

A 23-year-old woman is brought to the emergency department by emergency medical services. She was found trying to hang herself in her kitchen. The patient has a past medical history of drug and alcohol use disorder, anxiety, mania, irritable bowel syndrome, and hypertension. Her current medications include naltrexone, sodium docusate, and clonazepam as needed. Her temperature is 99.5°F (37.5°C), blood pressure is 100/65 mmHg, pulse is 90/min, respirations are 15/min, and oxygen saturation is 99% on room air. On physical exam, you note a teary young woman. There are multiple bilateral superficial cuts along her wrists. The patient's cardiac and pulmonary exams are within normal limits. A neurological exam reveals a patient who is alert and oriented. The patient claims that you cannot send her home because if you do she will kill herself. She is compliant with an exam and laboratory testing. Laboratory values are ordered and return as below.

Hemoglobin: 15 g/dL
Hematocrit: 40%
Leukocyte count: 4,500 cells/mm^3 with normal differential
Platelet count: 197,500/mm^3

Serum:
Na+: 139 mEq/L
Cl-: 102 mEq/L
K+: 4.4 mEq/L
HCO3-: 24 mEq/L
BUN: 20 mg/dL
Glucose: 90 mg/dL
Creatinine: 1.0 mg/dL
Ca2+: 10.2 mg/dL
AST: 12 U/L
ALT: 10 U/L

The patient is transferred to the crisis intervention unit. Which of the following is the most appropriate next step in management?