A complete assessment for patients with BN includes an investigation of developmental, psychiatric, and medical history, as well as current symptomology, functioning, and social supports. The BN should specifically be questioned regarding his/her pattern of eating (including binges and other eating episodes), purging, and use of laxatives, diuretics, enemas, excessive exercise, diet pills, and ipecac. A history of the patient's lifetime highest and lowest weights, as well as any significant weight fluctuations should be noted. The patient's current height and weight should be recorded and monitored in order to note any weight changes that occur with changes in symptoms. It may be helpful to speak with the patient's family members or other social supports, as they may be able to provide additionally helpful information regarding the patient's illness. As BN has a high rate of comorbidity with other psychiatric disorders, a full psychiatric evaluation ought to be conducted to determine any other disturbances. Due to the high incidence of medical abnormalities resulting from bulimia nervosa, the patient should be evaluated by a physician. Specifically, any dental erosion should be examined and a serum chemistry panel ought to be drawn to detect any electrolyte imbalances. Additionally, any gastrointestinal distress (including blood in the vomit) and menstrual irregularities should be examined.