When alternative therapies are used in place of conventional medicine, it is considered to be alternative medicine. When alternative therapies are used in addition to conventional medicine, they are considered to be complementary medicine. You Might Also Like Bioidentical Hormone Replacement is the use of naturally occurring hormones April 16, 2015 Allergies November 20, 2013 Flower Essences can help animals with thunderstorms June 4, 2014