Marinol is a lab made version of THC the main component of Marijuana. It is ironic that the FDA will pass this drug with a stamp of approval and not Marijuana. The reason it is not more widely used is because it is ineffective, only about 13% of people given the medication gain any benefit from it. And many end up feeling more sic, a possible reason is that the marijuana plant has many more components than just THC and it is believed that those components work together with the THC. another reason is that since it is ingested orally is takes 30+ minutes for it too take effect. Where as smoking a joint, or inhaling from a vaporizer is nearly instant. Drug companies cant profit from a plant they have to change it and in doing so they made it less effective. So just smoke and enjoy yourself, the fact that Marijuana can not kill you makes it a very good looking option too replace some prescriptions that can kill you.