Pure Eucalyptus Oil for use in aromatherapy and also as an inhalant. Sprinkle a few drops onto a handkerchief and inhale the vapour as required or place a few drops in hot (not boiling) water and inhale the vapours for 5-10 minutes. Eucalyptus Oil B. P can pr relief of catarrh or minor muscular sprains and cramps when massaged into the skin. It can also be sprinkled onto a handkerchief or in hot (not boiling) water to be inhaled in order to relieve stuffy noses and blocked sinuses. It is suitable for adults, elderly and children over the age of 1.