evening primrose Ref/CLJHTM128 Latin name: oenothera biennis. Family: Onagraceae. Parts used: fresh leaves and dried seeds. 20ml bottle. Description: plant in macerate. Composition: Evening primrose (Oenothera Biennis), organic apple brandy, 40% alcohol. *Cold maceration of the plant, protected from light, wild picking harvested by hand, natural culture, untreated, according to the organic method Directions for use: internal use. 10 drops morning and evening in a little water before meals. 20ml bottle. Directions for use: internal use. 10 drops morning and evening in a little water before meals. Precautions for use: do not exceed the recommended dose. Excessive intake of evening primrose oil can cause a few side effects, including migraines and nausea.