Marinol is 100% synthetic THC. It's fake THC made in a lab that's supposed to act as a pain reliever, appetite regulator, and is supposed to get rid of nausea... Almost everyone who has tried Marinol and has smoked Cannabis would rather stick with smoking Cannabis because it works better. From what I've heard, Marinol doesn't get rid of your nausea that well...
Marinol is infact proof of how hypocritical our government is. The FDA (a US government run agency) approved a synthetic form of THC to be used legally in all states called Marinol when it doesn't work as well as the natural form (which is still a federal offense to possess and grow)...