The Effect of a Weight Management Program During Treatment With Olanzapine

Inclusion Criteria: * Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) criteria for schizophrenia * Ages between 18 and 65 * Informed consent * Weight gain of at least 1.5 kg in the first 4 weeks * A sufficient understanding to participate adequately in the weight management program * Patients must agree to cooperate with all tests and examinations required by the protocol. * Each patient must understand the nature of the study and must sign an informed consent document. Exclusion Criteria: * Serious, unstable somatic illnesses * Illnesses associated with weight gain including renal and endocrine diseases * Weight change greater than 3 kg in the preceding three months * Weight gain less than 1.5 kg in the first 4 weeks