Professor David Finn:

That is Sativex which is not cannabis. It only has two compounds: tetrahydrocannabinol, THC, and cannabidiol, CBD. Medical cannabis is more complex. It is the plant material. There have been clinical trials and clinical studies on cannabis also and these have been published. I suppose it is merely a case of how many do we feel we need to satisfy us. Some people are satisfied now. Others feel they want more to be satisfied. That is the bottom line. It is where, as a professional, one sits on that. Different different professional bodies sit on either side at present.