Dry flower or desiccated mature fruit.
The European Medicine Agency (EMA) considers the elderflower for traditional use in the treatment of common cold symptoms. Elderberry fruits are traditionally used for constipation and catarrhal conditions.
The flower is traditionally attributed to diuretic, demulcent (exerting a protective action on mucus), venotonic (stimulating peripheral circulation), and antirheumatic action. The fruit is traditionally used as a mild laxative and for the following effects: immunostimulation, antiviral (inhibits the replication of some viruses), anti-inflammatory, antioxidant, antibacterial.