Many drug preparations used in anthroposophic medicine are ultra-diluted substances, similar to those used in homeopathy. Homeopathic remedies are not medically effective and are generally considered harmless, except when used as a substitute for a scientifically proven and effective cure.[1] In certain European countries, people with cancer are sometimes prescribed remedies made from specially harvested mistletoe, but research has found no convincing evidence of clinical benefit.[2][3] Some anthroposophic doctors oppose childhood vaccination, and this has led to preventable outbreaks of disease.[4]