Marijuana and Tetrahydrocannabinol (THC) are separate schedule 1 drugs. The definition of a schedule 1 drug includes:
The drug or other substance has no currently accepted medical use in treatment in the United States.
However, US Patent 6630507, which was assigned by The United States of America as represented by the Department of Health and Human Services, says:
THC (tetrahydrocannabinol) is another of the cannabinoids that has been shown to be neuroprotective in cell cultures, but this protection was believed to be mediated by interaction at the cannabinoid receptor, and so would be accompanied by undesired psychotropic side effects.
Actually there is quite a bit about the medicinal value of THC throughout this patent. If the United States has a patent that says Tetrahyrdocannabidol has medicinal value, why is it labeled as a Schedule 1 substance?