In order to prevent or diminish the induced weight gain caused by Olanzapine, several types of drugs have been investigated including H2-receptor antagonists such as Nizatidine and Ranitidine [7, 8] as well as selective serotonin reuptake inhibitors such as Fluoxetine, topiramate, reboxetine-betahistine, aripiprazole, and Amantadine [9, 10].