Treating anorexia nervosa typically requires a combination of medical stabilization, structured nutrition, psychotherapy, and ongoing relapse prevention. Because anorexia affects both the body and mind, treatment addresses physical health and the psychological patterns driving the illness. The specific approach depends on how medically compromised someone is, their age, and how long the illness has persisted.
How Treatment Intensity Is Determined
Anorexia treatment exists on a spectrum from outpatient therapy to emergency medical hospitalization. The level someone enters depends primarily on their physical condition. A person weighing less than 70% of their ideal body weight, or with a BMI below 15, generally requires inpatient medical care even without obvious complications. Rapid weight loss, defined as more than 10% of body weight in six months or more than 20% in a year, is another threshold for hospitalization.
Specific vital signs also trigger medical admission: a resting heart rate below 40 beats per minute, blood pressure below 90/60, blood sugar below 60 mg/dl, low potassium levels, or a body temperature below 97°F. These numbers reflect the point where the heart, kidneys, or other organs are at risk of failing. In adolescents and children, the thresholds are slightly different, with heart rates near 40 bpm or blood pressure below 80/50 warranting immediate care.
Psychiatric hospitalization serves a different purpose. It’s indicated when someone has a specific suicide plan, is unable to eat without constant supervision, cannot stop purging without oversight, or has such poor motivation to recover that a highly structured environment is necessary. People who live alone or lack family support may also need this level of care.
Most people with anorexia are treated at lower levels of intensity: residential programs, partial hospitalization (where you spend the day at a treatment center but go home at night), or outpatient therapy. The goal is always to use the least restrictive setting that’s still safe.
Medical Stabilization and Refeeding
For severely malnourished patients, the first priority is restoring physical stability, and this process requires careful medical supervision. Reintroducing food too quickly to a starved body can cause refeeding syndrome, a potentially fatal shift in electrolytes (especially phosphorus) that strains the heart and other organs. To prevent this, calories are introduced very gradually.
For patients at the highest risk, initial intake may start as low as 5 to 10 calories per kilogram of body weight per day, which for a small adult might mean only 300 to 500 calories. Electrolytes are tested and corrected before feeding begins, then monitored continuously through the first week. Phosphorus, potassium, and magnesium are supplemented preventively in most cases. If blood levels remain stable, calories are advanced over four to seven days toward a fuller intake.
For patients who are less medically fragile, refeeding can begin more aggressively. Guidelines from Australia and New Zealand support starting at 1,400 to 1,500 calories per day and increasing by 400 to 500 calories every two to three days. Some programs advance adults from 1,200 to 1,500 calories per day up to 3,500 to 4,000 calories per day over the course of treatment. These higher caloric needs reflect the fact that a recovering body burns enormous amounts of energy rebuilding tissue and restoring metabolic function.
Weight gain targets differ by setting. In the hospital, a gain of 0.5 to 1 kilogram (roughly 1 to 2 pounds) per week is considered optimal. For outpatient treatment, more than 0.5 kilograms per week is not recommended, since the process needs to be sustainable and medically monitored less frequently.
Psychotherapy: The Core of Treatment
Nutritional rehabilitation keeps someone alive, but psychotherapy addresses why the illness developed and how to sustain recovery. The most effective approaches vary by age.
Family-Based Treatment for Adolescents
For adolescents, family-based treatment (often called the Maudsley approach) has the strongest evidence base. It works in three stages. In the first stage, parents take complete control over their child’s eating. A therapist coaches the family on how to separate the adolescent from the illness, approaching refeeding with compassion while refusing to negotiate with the eating disorder’s demands. This stage is intentionally intensive and can feel uncomfortable for everyone involved.
The second stage begins once the adolescent has made meaningful progress toward weight restoration and can eat regularly without significant resistance. Control over eating is gradually returned to the young person. The third stage shifts focus away from food entirely, helping the family address normal adolescent challenges and allowing the teen to return to typical life.
Therapy Approaches for Adults
For adults, several types of psychotherapy are used. Cognitive behavioral therapy adapted for eating disorders helps identify and change the rigid thought patterns that maintain anorexia, such as all-or-nothing thinking about food, body checking rituals, and the belief that self-worth depends on weight. Other approaches include interpersonal therapy, which focuses on relationship difficulties that may fuel the disorder, and psychodynamic therapy, which explores deeper emotional patterns.
Therapy typically addresses the intense fear of weight gain, distorted body image, perfectionism, and the need for control that characterize anorexia. These patterns don’t resolve simply because weight is restored, which is why psychological treatment continues well beyond physical stabilization.
The Role of Medication
No medication treats anorexia nervosa directly. Unlike depression or anxiety, where certain drugs can address the core problem, anorexia has proven stubbornly resistant to pharmacological treatment. Most psychiatric medications have shown little or no benefit in accelerating weight gain or reducing the obsessive thoughts about food and body shape that define the disorder.
The one partial exception is olanzapine, an antipsychotic that multiple randomized trials have found modestly enhances weight gain. It may also help reduce the rigid, repetitive thinking patterns common in anorexia. However, it’s used as an add-on to therapy and nutritional rehabilitation, not as a standalone treatment.
Medications are more commonly prescribed to treat conditions that occur alongside anorexia, such as depression, anxiety, or obsessive-compulsive disorder. Importantly, some of these medications work poorly in a malnourished body, so they’re often started or adjusted only after some nutritional recovery has occurred.
Preventing Relapse
Anorexia has one of the highest relapse rates of any psychiatric illness. Recovery is rarely linear, and the transition from structured treatment back to daily life is a vulnerable period. Building a relapse prevention plan before leaving treatment makes a significant difference.
The foundation of prevention is learning to recognize your own early warning signs. These vary from person to person but commonly include skipping meals, increased body checking (weighing yourself frequently or studying your reflection), wearing loose clothing to hide your shape, exercising compulsively, withdrawing from friends and family, and feeling a growing need for control or perfection. Many people find that stress is the trigger that reactivates these patterns.
A practical relapse prevention plan includes several elements. First, identifying your specific triggers by reflecting on past moments when eating disorder urges returned. Second, creating a personal coping plan for those moments, which might include calling a trusted friend, returning to a structured meal plan, or reaching out to a therapist. Third, maintaining regular eating: three meals and snacks daily, spaced about every three hours, without going more than four hours without food. This consistency helps prevent the restriction cycle from restarting.
Building and actively using a support system is equally important. Some people keep a list of names and phone numbers to call when old thought patterns resurface. Reducing exposure to negative influences, whether that means unfollowing certain social media accounts, setting boundaries with people who comment on your body, or avoiding environments that trigger comparison, also helps protect recovery.
Regular check-ins with a trusted person, particularly in early recovery, help you stay aware of subtle shifts in behavior before they escalate. Developing new interests and hobbies that have nothing to do with food, exercise, or appearance gives you sources of identity and satisfaction that the eating disorder previously occupied.