I think people have forgotten that many medications used to contain cannabis. It is an ancient plant and has been used to heal for centuries. Our country is ruled by BigPharma and other corporations that don't want us to know about natural remedies. If weed were ever regulated by the FDA it would probably not be allowed to have the same properties it has now.
Pharmaceutical companies already have patents on drugs created from alkaloids found in this plant, which is considered sacred by native American tribes. The big pharmaceutical companies only want money, not healthy or enlightened people.