Anorexia nervosa is treated with a combination of structured nutritional rehabilitation, psychotherapy, and medical monitoring, with the intensity of care matched to how medically stable a person is. Most people begin with outpatient therapy, which remains the primary treatment setting even for severe cases, as long as vital signs and bloodwork are stable. Treatment typically involves a team that includes a therapist, dietitian, and physician working together.
How Treatment Intensity Is Determined
The first decision in treating anorexia is figuring out how much care someone needs right now. This comes down to medical stability, psychiatric safety, how long the illness has lasted, and how severe the weight loss is. Some guidelines recommend inpatient treatment when BMI drops below 15, but the number alone doesn’t tell the whole story.
Specific physical signs that typically require hospital admission include a resting heart rate below 50 beats per minute during the day (or below 45 at night), systolic blood pressure below 80 to 90 mmHg, body temperature below 95.9°F, or a pulse that jumps more than 20 beats per minute when standing up. Dangerous electrolyte imbalances, repeated episodes of low potassium, symptomatic low blood sugar, or suicide risk also warrant inpatient care. If someone doesn’t meet those thresholds and is medically stable, outpatient psychotherapy is the standard starting point.
Between full hospitalization and weekly outpatient visits, there are intermediate options: residential programs where you live at the facility, and partial hospitalization or day programs where you attend treatment during the day and go home at night. People often step down through these levels as they stabilize.
Nutritional Rehabilitation and Weight Restoration
Restoring weight is one of the most medically delicate parts of treatment. Reintroducing food to a severely malnourished body can trigger refeeding syndrome, a potentially dangerous shift in electrolytes (especially phosphorus, potassium, and magnesium) that can affect the heart and other organs within the first five days of eating again. This is why hospitalized patients at high risk have their electrolytes checked daily during the first week and three times the following week, with vital signs monitored every four hours in the first 24 hours.
Once refeeding is safely underway, the general targets are gaining 2 to 3 pounds per week in an inpatient setting and about 1 pound per week in outpatient care. Later in recovery, inpatients may gain up to 2 to 3 pounds weekly while outpatients typically aim for about 1 pound. These targets are individualized. The American Psychiatric Association recommends setting personalized weekly weight gain goals and a target weight rather than applying a single number to everyone.
Nutritional rehabilitation isn’t just about calories. It involves relearning how to eat regular meals, understanding how the body regulates weight, and gradually expanding the range of foods someone is comfortable with. A dietitian usually guides this process alongside the therapy team.
Psychotherapy for Adolescents
For adolescents and young adults who have a caregiver involved, the APA recommends family-based treatment (often called FBT or the Maudsley approach) as the first-line therapy. This method works in three distinct phases and puts parents at the center of recovery, at least initially.
In Phase 1, parents take full control of their child’s eating. They decide what the child eats, how much, and when, and they monitor all food intake and limit physical activity. This mirrors what a hospital treatment team would do, but it happens at home. The goal is rapid physical stabilization. In Phase 2, once weight is being restored steadily, control over eating is gradually handed back to the adolescent. They might begin serving themselves meals, with parents watching and stepping in if portions are inadequate. Phase 3 shifts focus to normal adolescent development. The family identifies upcoming challenges (social situations, school transitions, growing independence) and works out how the young person can navigate them without falling back on disordered eating.
Psychotherapy for Adults
For adults, the APA recommends eating disorder-focused psychotherapy that addresses three core areas: normalizing eating and weight control behaviors, restoring weight, and working through the psychological drivers of the disorder like fear of weight gain and body image disturbance.
One of the most widely studied approaches is Enhanced Cognitive Behavioral Therapy (CBT-E). For underweight patients, sessions typically start at twice per week until weight gain stabilizes, then drop to once weekly. The early phase (about four weeks of twice-weekly sessions) focuses on building a personalized picture of what’s keeping the eating disorder going, establishing regular eating patterns, starting weekly weigh-ins during sessions, and beginning to address weight restoration. The middle phase tackles the specific thought patterns and behaviors maintaining the disorder. The final phase, spread across three sessions two weeks apart, focuses on maintaining progress and building a plan to prevent relapse. Follow-up review sessions happen at roughly 4, 12, and 20 weeks after treatment ends.
The Role of Medication
There is no medication that treats anorexia itself. No drug has been shown to reliably resolve the core psychological features of the illness. The evidence supporting psychiatric medications for anorexia, even when depression co-occurs, remains limited.
That said, one medication has shown some benefit as an add-on to other treatment. In a study of hospitalized adolescents, those receiving olanzapine (an antipsychotic sometimes used off-label) gained about 0.9 kg per week compared to 0.7 kg per week in the comparison group. Nearly 70% of patients on the medication hit the target of at least 0.8 kg per week, versus about 33% without it. However, the medication did not improve body dissatisfaction or the psychological symptoms of the eating disorder any better than standard treatment alone, and it raised levels of the hormone prolactin, which can cause side effects. Medication, when used, is an adjunct to therapy and nutritional rehabilitation, not a replacement.
Why Relapse Prevention Matters
Anorexia has one of the highest relapse rates of any psychiatric condition. Studies with follow-up periods averaging 18 months have found relapse rates between 35 and 41%. One structured relapse prevention program brought that down considerably: 70% of participants did not relapse, 19% experienced a partial relapse, and 11% fully relapsed.
The core strategy is building a personalized relapse prevention plan before treatment ends. This involves identifying the specific triggers and early warning signs that preceded past episodes and writing out concrete actions to take if those signs reappear. After the plan is in place, a low-frequency aftercare program continues for a minimum of 18 months, with regular check-ins to monitor how things are going. The central principle is early intervention: catching warning signs quickly and acting on them before they spiral. This is why the end phase of therapies like CBT-E specifically builds out a long-term maintenance plan rather than simply stopping treatment.
What Recovery Looks Like in Practice
Recovery from anorexia is rarely linear. Treatment often spans months to years, and moving between levels of care (stepping up to a hospital or residential program during a crisis, stepping back down to outpatient when stable) is common and expected. Weight restoration is typically the first measurable milestone, but full recovery involves sustained changes in eating behavior, a shift in how someone relates to their body, and the ability to handle life stress without reverting to restriction.
The practical experience of treatment varies widely. Someone in outpatient care might see a therapist once or twice a week, meet with a dietitian regularly, and have periodic medical check-ins. Someone in a residential program lives at the facility, eats supervised meals, attends group and individual therapy daily, and has close medical monitoring. The common thread across all levels is that treatment addresses both the physical danger of malnutrition and the psychological patterns that drive it. Neither alone is sufficient.