Eucalyptus Australiana – Eucalyptus Radiata Essential oil 12ml is an energising and antiseptic oil that may assist in the relief of symptoms associated with colds, flu & congestion. It can be diluted in a carrier oil and applied to skin wounds including cold sores. Add 6-8 drops to a hot bath for a cleansing bath to clean your sinuses and leave you feeling invigorated. Combine with the following essential oils to relieve symptoms of colds & flu: Lavender. Marjoram. Peppermint. Tea Tree.