Bulimia Nervosa Diagnosis and Treatment
Understanding Bulimia Nervosa
- The American Psychiatric Association states that bulimia nervosa is characterized by recurrent episodes of binge eating followed by inappropriate compensatory behaviors to prevent weight gain, such as self-induced vomiting, laxative abuse, periods of starvation, or excessive exercise, with self-worth being overly based on body shape and weight 1
- The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) diagnostic criteria for bulimia nervosa require these behaviors to occur at least once a week for 3 months 1
Distinguishing Between Eating Disorders
- The key distinction between anorexia nervosa binge-eating/purging subtype and bulimia nervosa is primarily based on weight status, according to the American Psychiatric Association 2
Clinical Implications and Assessment
- The American Psychiatric Association recommends comprehensive assessment of patients with possible eating disorders, including vital signs, height, weight, BMI, and physical appearance for signs of malnutrition or purging behaviors 3, 4
- Laboratory assessment should include a complete blood count and comprehensive metabolic panel, with particular attention to electrolytes, liver enzymes, and renal function tests 4, 5
- An electrocardiogram is recommended for patients with restrictive eating disorders or severe purging behaviors due to potential cardiac complications 4
Treatment Considerations
- For adults with bulimia nervosa, the recommended treatment is eating disorder-focused cognitive-behavioral therapy (CBT) along with a serotonin reuptake inhibitor (typically fluoxetine 60 mg daily) 4
- For adolescents and emerging adults with bulimia nervosa who have involved caregivers, eating disorder-focused family-based treatment is suggested 4, 5
- Treatment should address both the psychological aspects (fear of weight gain, body image disturbance) and the behavioral components (normalizing eating patterns, eliminating compensatory behaviors) 3
Important Clinical Considerations
- Early identification and intervention are critical as mortality rates for eating disorders are among the highest for any psychiatric disorder 2