First generation antihistamine drug which is derived from ethylene diamine with important sedative and antimuscarinic effects. At latest update no published data on excretion into breast milk was found.Inhibition of breastfeeding in the first weeks after birth due to an antiprolactin effect may appear.For both the mother and the infant it would be safer taking antihistamines with proven safety and without sedative effect, especially in case of premature babies and infants under 1 month of age. Otherwise when used during lactation, take the lowest effective dose but avoiding a prolonged use. Follow-up the baby for drowsiness and feeding issues.It is not recommended to share a bed with your baby if you are taking this medicine. The topical use as a gel or cream is compatible with breastfeeding. Do not apply on the chest. See Dimethindene Maleate (topical).