Anticholinergic and smooth-muscle relaxant with antimuscarinic action which is used to relieve spasticity, inflammation, pain and incontinence of the urine bladder tract. At latest update relevant published data on its excretion into breast milk were not found. The antimuscarinic effect may reduce milk production (De Martino 1980, Bizarro 1980), albeit only during the first weeks postpartum. Side effects occur very rarely with a rather low risk during lactation when timely used. Monitoring of milk production and anticholinergic symptoms in the infant such as irritability, nausea or constipation would be desirable. Until more published data on this drug related to breastfeeding is available, an alternative with a known pharmacokinetic profile that should appear safer while breastfeeding (higher protein-binding capacity, lower half-life span and lower oral bioavailability) may be preferable, especially during the neonatal period and in case of prematurity.