Forsythia has broad-spectrum antimicrobial activity. Main antibacterial components are forsythol and its volatile oils, which have a strong inhibitory effect on Staphylococcus aureus and Shigella and a certain inhibition on influenza virus, leptospira, and other pathogens and thus prevent hemolysis (the rupture or destruction of red blood cells). Forsythia has anti-inflammatory and antipyretic effects (prevent or reduce fever). The oleanolic acid contained in Forsythia can strengthen the heart, induce diuresis (reduce excessive production of urine) and lower high blood pressure. The vitamin P contained can reduce vascular permeability and fragility. Forsythia is used for swelling of small air passages in the lungs (bronchiolitis), tonsillitis, sore throat, fever, vomiting, heart disease, HIV/AIDS, gonorrhea, pain, swelling (inflammation), and a severe skin rash with fever and vomiting caused by a bacterium (erysipelas).