While doctors are allowed to prescribe any drug for off-label use, it is ILLEGAL
for pharma companies to promote a drug
for anything other than what it has been approved by the FDA to treat. Eli Lilly was found guilty of doing this.
But hey, it's alright. If you develop diabetes from taking Zyprexa, you can just take Humilin, Eli Lilly's biosynthetic insulin approved for use in type I and II diabetes...