Synergies can be used in several ways - lovely steam inhalations, add to a relaxing bath, in a room vaporiser and one of my favourites, drops on a tissue which you can pop down your top (or in your pocket), you will get wafts of the synergy all day - you can also inhale it throughout the day to help relieve whatever ails you.
Use only as directed, Many essential oils can be toxic if ingested, even in moderate doses. Never ingest or use undiluted essential oils (neat) on the skin, for any 'therapeutic' purposes. If an oil is ingested by accident, drink fatty milk and seek advice, do not drink water nor induce vomiting. Consult your healthcare professional if symptoms persist.