Medication for Anorexia Nervosa: When Is It Used and What Are the Options?

Anorexia nervosa is primarily treated with psychotherapy (CBT-E, FBT), nutritional rehabilitation, and medical monitoring. No medication is FDA-approved for core anorexia symptoms. However, medications may address comorbidities or complications.

When Medication May Be Considered

• Depression/Anxiety: SSRIs (e.g., fluoxetine) after weight restoration; limited benefit in underweight state.
• Obsessive-compulsive features: SSRIs or low-dose antipsychotics.
• Severe agitation/psychosis: Low-dose second-generation antipsychotics (olanzapine, quetiapine) may aid weight gain and reduce rigidity.
• Bone health: Bisphosphonates (controversial in young women); estrogen replacement not recommended solely for bone.
• Gastroparesis: Metoclopramide, domperidone.
• Electrolyte abnormalities: Supplementation (phosphate, potassium, magnesium).

Key Principles

• Medication is adjunctive, never standalone.
• Weight restoration is the most effective "treatment" for many neurobiological changes.
• All prescriptions require careful risk-benefit analysis by an eating disorder specialist.
• Monitor for QT prolongation, metabolic effects, and worsening edema during refeeding.

Multidisciplinary team (physician, therapist, dietitian, psychiatrist) is the gold standard.