Relaxant drug of the muscle with action on the Central Nervous System and chemically related to tricyclic antidepressants. At latest update, relevant information on excretion into breast milk was not found. Because of a high plasma protein binding capacity, excretion into breast milk seems to be unlikely. Long-term treatments or those mothers who are nursing a newborn or premature infant would be prudent the use of a known safer alternative or with a shorter elimination half life. Infants should be monitored for sleepiness.