Anorexia nervosa

Heart rate < 50 beats/min daytime; < 45 beats/min nighttime

Systolic blood pressure < 90 mm Hg

Orthostatic changes in pulse (> 20 beats/min) or blood pressure (> 10 mm Hg)

Arrhythmia

Temperature < 96°F

< 75% ideal body weight or ongoing weight loss despite intensive management

Body fat < 10%

Refusal to eat

Failure to respond to outpatient treatment

Bulimia nervosa

Syncope

Serum potassium < 3.2 mmol/L

Serum chloride < 88 mmol/L

Esophageal tears

Cardiac arrhythmias including prolonged QTc

Hypothermia

Suicide risk

Intractable vomiting

Hematemesis

Failure to respond to outpatient treatment