It is a non-depolarizing muscle relaxant drug with a peripheral action that is used as premedication for endotracheal intubation, general anesthesia and mechanical ventilation. At latest update, no relevant published data concerning excretion into breast milk were found. Because a relatively high molecular-weight and a high protein-binding capacity, excretion into breast milk is thought to be low. It has a low oral bioavailability which means that absorption from the breast milk ingested may be low. Vecuronium should not prevent a mother from breast feeding her baby shortly after recovering from an anesthesia if she is in good condition. However, other muscle relaxants with a more rapid elimination time period and better known drugs are preferred. List of Essential Medicines WHO 2002: Compatible with breastfeeding.