›Recheck every 4-6 hours
›IV fluid strategy
›Normal saline (0.9% NaCl) as first-line
›1-2 L bolus for significant dehydration
›Replaces volume depletion and turns off renin-angiotensin system
›Essential prerequisite to effective K+ correction
›Avoid hypotonic fluids initially
›Risk of hyponatremia worsening
›Transition to oral hydration when hemodynamically stable
›Isotonic oral solutions preferred
›Monitor urine output target 0.5-1 mL/kg/hr
›FDA-approved medication
›Fluoxetine (SSRI)
›Only FDA-approved medication for bulimia nervosa
›Target dose 60 mg/day orally
›Superior efficacy at 60 mg vs 20 mg/day
›Titrate up over 1-2 weeks to minimize GI side effects
›Class I recommendation based on multiple RCTs
›Reduces binge-purge frequency by approximately 50%
›Initiate when electrolytes stabilized
›Contraindicated medications
›Bupropion
›Contraindicated in bulimia nervosa; seizure risk significantly increased
›Risk appears related to purging-induced electrolyte abnormalities lowering seizure threshold
›QTc-prolonging agents requiring caution
›TCAs (avoid if K+ abnormal)
›Ondansetron (use with caution; monitor QTc)
›Haloperidol and certain other antipsychotics
›Antiemetics
›Metoclopramide 10 mg IV/oral for nausea
›Avoid prolonged use (tardive dyskinesia risk)
›Ondansetron 4 mg IV with caution
›Monitor QTc if hypokalemia present
›Thiamine supplementation
›Thiamine 100 mg IV or oral before glucose or refeeding
›Prevents Wernicke encephalopathy in malnourished patients
›B-complex vitamins as adjunct
Nutritional rehabilitation
›Structured refeeding protocol
›Acute setting
›Regular structured meals; eliminate forbidden food lists
›Dietitian involvement for meal planning
›Avoid prolonged fasting between meals
›Refeeding syndrome prevention
›Start at 50% estimated caloric need if significantly malnourished
›Advance by 200 kcal/day every 1-2 days
›Monitor K+, PO4, Mg2+ daily for first week
›Thiamine before refeeding initiation
›Laxative and diuretic withdrawal
›Abrupt cessation causes rebound peripheral edema
›Counsel that edema is expected and self-limited (resolves in 2-4 weeks)
›Does not represent true weight gain
›Evidence-based behavioral interventions
›Cognitive behavioral therapy (CBT)
›Gold-standard for bulimia nervosa in adults
›Targets cognitive distortions about body image and food
›Typically 20 sessions over 20 weeks
›Class I recommendation; strongest evidence base
›Family-based therapy (FBT)
›First-line for adolescents with bulimia nervosa
›Parents supported to take temporary control of refeeding
›Interpersonal psychotherapy (IPT)
›Second-line when CBT unavailable or refused
›Targets interpersonal triggers for binge-purge behavior
›Dialectical behavioral therapy (DBT)
›For patients with co-occurring borderline personality disorder or severe emotion dysregulation