While there is evidence that medicinal cannabis products can help manage pain and side-effects from treatment, there is currently no reliable evidence that says it can effectively treat cancer in patients. More trials are needed to understand which cannabis products could be used in the future. You can find out more about the research that is currently being carried out in a very interesting article on our science blog.
Taking cannabis oil could potentially interfere with any other conventional cancer treatments, so you should talk to your stepdad's medical team for advice in the first instance.
