Elderflower is also commonly used to make cordials as well as the following uses

• the common cold
• fevers or flu's
• acute and chronic sinus or hayfever
• sore throats
• bronchitis 

Take 1 tsp of dried herb and add 1 cup of boiling water, steep for 5 minutes, strain and drink 1-2 cups per day for best result - leaves can be reused across the day