You need to do a lot more research on Cannabis oil. I am pleased to say that my state of Georgia has just passed legislation that will go into effect in 30-60 days which allows doctors to prescribe Cannabis oil for 8 specific conditions including cancer. Cannabis oil is having very positive results especially in brain cancer and lung cancer.
Prior to l937 Cannabis oil was used in many common medicines in the US and it worked.
I actually have read many medical research articles about cannabis oil (delta-9-tetrahydrocannabinol). There is no evidence beyond rumors that it has a curative effect on anything. It is prescribed (as Dronabinol or Marinol) for appetite induction in cancer patients who have lost their appetite and for whom no other drug is effective. It is also used to treat nausea and vomiting. I am not convinced that it actually is the most effective option for those indications, since the clinical study done on it was so small. It does not cure cancer.
Cannabis oil also activates the same pathway induced by dioxin. Since I got my PhD by studying the molecular mechanisms of dioxin toxicity, this tells me that there are a LOT of things going on when people smoke marijuana. Activation of the dioxin response pathway causes endocrine disruption, birth defects, immune system dysfunction, cancer, and a whole bunch of other things that generally aren't very good for you. Because of my experience studying dioxin, I have a fairly strong desire to stay away from anything that mimics the behavior of dioxin.
When I worked in a hospital, every few months, I would be assigned to do a pharmacy inventory of schedule II, III, and IV drugs. That Army hospital carried marinol (dronabinol) in the inventory. It's been sold as a pharmaceutical for several years now.