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. A high molecular weight may decrease excretion into breast milk as well as a rapid elimination time. In addition, a low oral bioavailability makes unlikely a pass from ingested mother's milk onto the infant's plasma. Mivacurio should not prevent a mother from breast feeding her baby shortly after recovering from an anesthesia if she is in good condition.