Treating cancer with cannabis oil is controversial, but some patients will swear by it. The legality of pot is a problem, as is the method of extracting the cannabinoids from the plants. It involves working with dangerous solvents, which themselves are often illegal and, ironically, cancer causing. While some say that the pharmaceutical companies don't want the competition cannabis products might be to their medications, researchers say the science isn't complete yet.
Because of the legal and ethical concerns surrounding marijuana, large scale medical studies and clinical trials that show its effectiveness do not exist yet. The one thing that most can agree on however is more research into a possible cure for cancer is desperately needed.