Homeopathy obviously falls into the class of therapeutic methods that increase the body's own defenses. The basis of homeopathy, called the principle of the similars, suggests that a microdose of a substance will cure any pattern of symptoms that this substance causes in large doses. This principle is also seen in the use of vaccines and allergy treatments, although homeopathic medicines are considerably smaller and safer in doses and more individualized for the person for whom they are used. 9811382552