Disease Description (Causes and Symptoms)
Bulimia nervosa is an eating disorder characterized by recurrent binge eating (eating a large amount of food in a short period and feeling a loss of control over eating) associated with a distorted perception of one’s body shape and weight, and compensatory behaviors to prevent weight gain (such as self-induced vomiting, misuse of laxatives or diuretics, and excessive exercise).
Causes and pathophysiology: A combination of genetic predisposition, abnormalities in the brain’s appetite-regulation pathways, and psychological and neurophysiological factors such as impulse-control problems and emotional-regulation problems contribute to the disorder. Psychological stress during adolescence, personality traits, and alcohol dependence may coexist.
Main symptoms: Recurrent binge eating, vomiting or use of laxatives or diuretics immediately after binge eating, strenuous exercise, excessive concern about weight, abdominal pain, throat and dental damage caused by vomiting, and electrolyte imbalances may occur. Psychiatric comorbidities (depression, anxiety, obsessive-compulsive disorder, impulse-control disorders, and substance use disorders) are common.
Treatment Methods
- Psychotherapy: Cognitive behavioral therapy (CBT, especially CBT-E) is the first-line standard treatment. Interpersonal psychotherapy (IPT) and family therapy (especially for adolescents) are also options. Treatment focuses on reducing binge eating and purging behaviors and modifying thoughts and behaviors related to a distorted body image.
- Medication: Selective serotonin reuptake inhibitors (SSRIs), particularly fluoxetine, are used because there is evidence that they reduce the frequency of binge eating and vomiting. Other antidepressants or adjunctive medications may be considered depending on the symptoms and comorbidities.
- Nutritional management: Developing a structured meal plan with a dietitian, restoring normalized eating patterns, and receiving education on managing situations that trigger binge eating.
- Acute and inpatient treatment: Inpatient treatment and medical and electrocardiographic monitoring are necessary when there are severe electrolyte abnormalities (e.g., severe hypokalemia), dehydration or cardiac rhythm abnormalities, emergency complications (such as esophageal perforation), or a high risk of self-harm or suicide.
- Complication management: Electrolyte imbalances, cardiac rhythm abnormalities, dental erosion, esophageal or gastric damage, and gastrointestinal dysfunction require medical or dental treatment.
Precautions and points to consider for self-management: Vomiting and laxative misuse must be stopped immediately. Because of the risk of electrolyte and fluid abnormalities, they should not be stopped or attempted without consulting medical professionals. Regular blood tests, electrocardiograms, and dental checkups are recommended. Because relapse is possible, long-term follow-up and a relapse-prevention plan are necessary.
Prognosis: Some people improve without treatment (approximately 25%), while improvement has been reported in about half of people who receive treatment. Because relapse is possible, ongoing management is necessary.
Checklist Before an Outpatient Visit (Preparation and Example Questions)
Items/information to provide:
- A list of currently taken medications and supplements (including doses and dosing times)
- Past medical history, psychiatric diagnoses, and treatment history (including medication and psychotherapy)
- Recent weight changes and weight records (a weight chart if possible)
- A symptom diary recording the frequency and duration of binge eating, vomiting, and laxative use (over the past 1–4 weeks)
- Results of recently performed tests (blood tests, electrolytes, ECG, etc.) or testing records
- Current status of sleep, alcohol use, and drug use (alcohol and other substances)
- Whether suicidal thoughts or self-harm behaviors are present (inform a healthcare professional immediately if present) Items to show the doctor during the outpatient visit: symptom diary, medication list, previous test results
Items to check before the visit (brief):
- Average frequency of binge eating and purging behaviors (number of times per week)
- Whether recent symptoms such as dizziness, muscle weakness, palpitations, or fainting are present (suspected electrolyte abnormality)
- Tooth pain or symptoms of dental erosion
- Severity of sleep problems and depressive or anxiety symptoms
General Example Questions to Ask the Doctor
- What is the standard treatment recommended for this disorder? (Psychotherapy vs. medication)
- Do the medications I am taking (or my underlying medical conditions) affect the choice of treatment?
- What are the expected effects and side effects of medication treatment?
- How are electrolyte abnormalities or heart problems monitored? How often should I be tested?
- What management is needed to reduce the risk of relapse after treatment?
Examples of Disorder-Specific Questions
- I am concerned about electrolyte abnormalities, especially potassium, or cardiac rhythm problems caused by my vomiting and laxative use. What tests should be performed, and how often should monitoring take place?
- Which would you recommend starting first, CBT (cognitive behavioral therapy) or medication, and if both are used together, what are the expected treatment duration and goals?