Elder flowers are ideal for the treatment of colds and influenza. Combined with peppermint in a tea taken for a period of six months with breaks in between is said to clear the herpes simplex virus. - the one that causes cold sores.
Elder flowers can be used in any catarrhal inflammation of the upper respiratory tract such as hay fever and sinusitis.
For colds and fevers use it with peppermint and yarrow. For influenza combine it with bonset.