 In Japan, there is a tendency to list all plants ingredients together as a formulation.This contrasts with the USA, where additional (and optional) plant ingredients in a formulation are listed separately as "inactive ingredients", and are not covered by a patent (only the "active ingredient").For example, some nasal sprays in USA with oxymetazoline HCL (the active ingredient) contain menthol and eucalyptol listed as "inactive ingredients".