Elderberry is used as treatment for the cold, flu, and sinus problems and as an astringent. Drugs.com indicates elderberry is used as a laxative. It may be effective for cancer and AIDS patients and for anti-inflammatory abilities.
Using elderberry extract may decrease congestion in colds and sinus infections per the University of Maryland Medical Center. Elderberry extract is used to reduce flu symptoms by two to four days, per WebMD.
Elderberry increases inflammatory cytokines and may be used for cancer and AIDS patients during chemotherapy treatments as an immunoprotective notes Barak et al in European Cytokine Network. It could also help inflammation. Elderberry contains flavonoids with antioxidant properties, states the University of Maryland Medical Center.