They called it the "VIVA ZYPREXA" campaign to off label market Eli Lilly Zyprexa as a fix for unapproved usage. Zyprexa (Olanzapine) is known as an atypical antipsychotic It's mechanism of action is thought to be that it increases levels of serotonin and dopamine. It's chemical name is thienobenzodiazepine although is not a benzo like valium.One of it's well known major side effects is weight gain which is why it is sometimes favored for those with eating disorders (which would be an off label use) Doctors are at liberty prescribe drugs 'off label' like Zyprexa which is only FDA approved for schizophrenia and bipolar.They can give it or just about any drug for conditions other than what the drug was tested for.The doctors don't realize that Zyprexa is very addictive once a dependence has been built up and withdrawal is wicked. I took it 1996-2000 for PTSD and it was worthless for my symptoms and gave me diabetes with an A1C of 13.9 normal blood sugar is 4 I had to get off it and it took me two months of horrible insomnia,I did not sleep for weeks. So,be warned Zyprexa IS addictive,I think worst than nicotine and don't go off it unless you do so gradually under a doctor's care. I am a whole lot better now,except for the diabetes and wishing every one a cheerful holiday season coming up.