The volatile oil in aniseed provides the basis for its internal use to ease griping, intestinal colic and flatulence. It also has a marked expectorant and antispasmodic action . Externally, the oil may be used in an ointment base for the treatment of scabies and lice infestations. Aniseed's mild oestrogenic effects is thought to increase libido.
Aniseed Oil can become solid in cold temperatures, if this happens run the bottle under warm water.