WHAT IS ELDERBERRY? Elderberry is the dark purple berry from the European elder tree. The berries are used to make medicine. Elderberry is used for the common cold, “the flu” (influenza), and H1N1 “swine” flu. It is also used for HIV/AIDS and boosting the immune system. Elderberry is also used for sinus pain, back and leg pain (sciatica), nerve pain (neuralgia), and chronic fatigue syndrome (CFS). Some people...