My friend has lung cancer. He was diagnosed last June. Since then he has been taking rick simpson oil everyday. His last check up a few weeks ago the doctors told him that the cancer had stopped growing and or he hadnt gotten any worse. His energy massively increased and quality of life increased once he started eating the oil daily.
a (temporary) pause in apparent growth is a very far cry from curing. With chemo (and/or radio) therapy, its usually possible to significantly reduce the tumor size, but even that is no cure, it will always come back. I dont know what they told you, but Im sorry to say lung cancer is a death sentence, and especially if its already spread like in my mom's case. Depending on the exact type and stage, the prognosis ranges from a few month untreated to a few years with heavy chemo/radio.
As for that oil: I am more than willing to believe hemp or cannabis extracts can be very useful, heck thats why Im looking in to vaping it, it appears it may even help fighting the tumor, some clinical trials suggests it actually does that to some extend, but that "rick simpson oil" sounds a lot like snake oil to me and if your friend or you think its an actual cure, you are probably being deceived. Reminds me of my aunt who had breast cancer, and her somewhat gullible children spent fortunes on 'alternative' treatments. I remember her sitting under some buzzing electrified metal mesh that seemed to be little else than an electric fly trap, except that it costed 1000's of euro's and obviously did absolutely nothing, not even to flies.
Now Im not saying cannabis derivatives are exactly like that, unlike the fly trap, there is evidence it can help, certainly for the symptoms, and maybe/sometimes help fight the root cause, but its not a silver bullet and I would never dismiss the entirety of medical research in favor of some heresay testimonials on the internet from people who might have gotten lucky or misdiagnosed. If you go by the latter, than praying or a pilgrimage to Lourdes should also be considered.
Also, chemo is the wrong way to deal with this situation, especialy if you expect the oil to work.
Some of the research on CDB and THC I read suggest that aside from the positive effects on pain and mood, it could be particularly useful in combination with chemo, because it sometimes enhances the effect of chemo. But there is a lot of conflicting evidence. As for chemo being the "wrong way", chemo in general is pretty nasty, even if the type my mother will be given has only limited side effects, and for sure at some point you have to wonder if the cure isnt worse than the disease, but unfortunately its about the only known way that really does work to some extend. How much and at what cost, we'll have to find out. Only when we've seen the results can I judge if its the "wrong way" for her, and if possibly gaining a (miserable) year is a worthwhile tradeoff at her age.