It is a non-depolarizing muscle relaxant drug with a peripheral action that is used as premedication for endotracheal intubation and general anesthesia. A product that is rarely used with very few bibliographic references. At latest update, no relevant published data concerning excretion into breast milk were found. Like other blocking drugs from the same family, its relatively high molecular weight would decrease excretion into breast milk. Other well-known and safer options should be preferred until more information on this drug is available. List of Essential Medicines of the WHO: compatible with breastfeeding.