Early diagnosis and treatment can improve the overall prognosis in an individual with anorexia. Despite most psychiatric medications having little effect on the symptoms that are specific to anorexia, the improvement in associated symptoms (for example, anxiety and depression ) can help anorexia sufferers engage more actively in treatment and otherwise have a powerful, positive effect on the improvement that individuals with anorexia show over time. With appropriate treatment, about half of those affected will make a full recovery. Some people experience a fluctuating pattern of periods of weight gain followed by relapses, while others experience a progressively deteriorating course of the illness over many years, and still others never fully recover. It is estimated that about 20% of people with anorexia remain chronically ill from the condition.