Biological therapy uses materials produced by the body or
manufactured in a lab to boost, direct, or restore your body's natural defenses
against disease.
Biological response modifier (BRM) therapy, or immunotherapy, is
sometimes used to treat cancer. For example, trastuzumab (Herceptin) has been
approved by the U.S. Food and Drug Administration (FDA) for the treatment of
breast cancer in women who have completed menopause.