S-Enantiomer of Citalopram that shares similar pharmacokinetics and properties with Citalopram. Excretion into breast milk is clinically non-significant. Serum levels of infants from breastfeeding mothers who were treated have been shown to be undetectable or very low. Overall, short or long-term harmful effect has not been reported among breastfed infants. Isolated cases of irritability and neonatal necrotizing enterocolitis after intrauterine exposure have appeared in medical literature contrasting with harmlessness reported by others. Galactorrhea associated or not to hyperprolactinemia, may appear. Women who are on antidepressant treatment in pregnancy are in need of special and intensive support for breastfeeding because of a high risk of early weaning.