Homeopathy, or homeopathic medicine, is a medical philosophy and practice based on the idea that the body has the ability to heal itself.omeopathic medicine views symptoms of illness as normal responses of the body as it attempts to regain health. Homeopathy is based on the idea that like cures like.. That is, if a substance causes a symptom in a healthy person, giving the person a very small amount of the same substance may cure the illness.