Eating disorders are associated with two or four comorbid diagnoses especially mood, anxiety, obsessive compulsive, substance abuse and personality disorders.

Psychotic disorders are seen rarely with eating disorders which have been reported as case reports.

40 years old male patient suffering for vomiting after eating and drinking large amounts of water and then purge. Recently vomiting has became habituation; he felt dysphoria after eating and forced himself to vomit. He didn’t want to be thin and wanted to gain weight. He didn’t think that condition could be a disease.

In his childhood he had bizarre behaviours. For instance he pulled up the paints of walls and then ate the pieces of paints. He teared off the skin nearby his nails. Since adolescence he was social isolated, introverted, affective flattened. His self appearance was poor. He couldn’t perform his grooming and cleaning by himself. He didn’t want to take a bath. Eight years ago with his mother's death he developed binge eating and vomiting problems.

He was hospitalized in internal clinics for two times due to losing weight. Then he was admitted to psychiatry clinic. The level of plasma potassium was 2.4 mEq/lt during hospitalization. The patient was treated both for weight restoration, electrolite regulation and psychiatric condition. Olanzapine 20 mg/day, ketiapine 600 mg/day was administered. Within 1 month his medical condition was remitted but he couldn’t gain weight, his negative symptoms.

This case is a male diagnosed as schizophrenia comorbid with atypic eating.