Aniseed oil is is a tonic for the circulatory system & respiratory tract, it is also effective on the digestive system. It can calm the nerves of tense and anxious whilst having a calming effect on menstrual pains It eases nauseous migraines, while stimulating the lungs to expel phlegm. For Oil Burners In Oil Burners, aniseed oil is useful for asthma, colds and breathing problems, as well as easing nausea and vomiting.