So-called genuine anise oil, which is obtained by steam distillation of anise fruit. This oil is quite expensive and rare. More commonly used is star anise oil, see Oleum anisi stellati .
Quality is specified in the European Pharmacopoeia (Ph. Eur.).
HMPC monograph: Traditional-use: Mild spasmodic gastrointestinal discomfort, flatulence, flatulence; expectorant for cold-related cough
ESCOP monograph: Dyspeptic discomfort, mild spasmodic gastrointestinal discomfort, flatulence, flatulence; mild upper respiratory tract inflammation, expectorant
Commission E monograph: Internal: Dyspeptic discomfort; Internal and external: Catarrh of the airways.