Olanzapine belongs to a kind of anti-psychotic drugs, of course, many patients applying olanzapine, due to some drug side effects or because of suffering from mental illness itself to reduce the activity, may lead to their own fat a situation, this drug or many people will appear this situation. After stopping the drug through proper diet control, appropriate physical exercise, generally can restore weight, because this drug does not have hormones. During the application of this drug, it may cause some growth of appetite, which may make it more difficult to control appetite, eating more and less activity, so it is easy to gain weight. But after stopping the drug through appropriate activities and exercise, reasonable diet, generally can control the weight down.