evidence: There have been some early clinical trials of cannabinoids in treating cancer in humans and more studies are planned. While the studies so far have shown that cannabinoids can be safe in treating cancer, they do not show that they help control or cure the disease. Relying on marijuana alone as treatment while avoiding or delaying conventional medical care for cancer may have serious health consequences. [...] Kramer JL. Medical marijuana for cancer. CA Cancer J Clin. 2014 Dec 10.