On latest update no relevant data related to breastfeeding were found. A widely used herb as condiment in food preparation and as infusion tea. Because a lack of toxicity when used at appropriate dose, infrequent or moderate use may be compatible while breastfeeding. Shrub. Florid summits are used. Contains essential oil, (Thymol, Carvone) flavonoids, tannins, terpenes, Phytoestrogens and Phytogestagens. Essential oil is irritant. Although Phytoestrogens are present in low amount, it is known that Estrogens can decrease milk production. Unproven effects: expectorant, anti-spasmodic. (Not clinically tested) Indications by European Medicines Agency (EMA) and Commission E of German Ministry of Health: dry cough, bronchitis.