OBJECTIVES The aim of the study was to define and characterize the agitation states present in usual medical practice in the acute and emergency units of a psychiatric hospital from the viewpoint of psychiatrists and nurses. We also aimed to describe the typical care packages (crisis intervention) for each of the agitation states described. METHODS Two nominal groups, one with 7 nurses and the other with 10 psychiatrists, from the Parc Sanitari Sant Joan de Déu emergency and acute care psychiatric wards were established. RESULTS The nurses described two main states forming the endpoints of a spectrum: from mild (pre-agitation) to  severe (agitation). A third state was outlined in which agitation was characterized by disorganized behavior problems. Agitation subtypes were described according to the characteristics and severity of the clinical situation. Various care packages were described for each agitation state.  The care packages were divided into first, second and third line approaches. The first line approaches (i.e., verbal containment) were used on every (pre)agitated patient. If the first line approach was not effective, the second and third line approaches were implemented, culminating with physical restraint. Every episode was followed by behavioral observation. The psychiatrists described 3 states: a mild initial state (anxiety and irritability), moderate (pre-agitation without aggressiveness) and a severe state of agitation with aggressiveness and/or violence. Again, every state was associated with specific treatment. CONCLUSIONS In order to avoid progression to a severely agitated state, both groups agreed on the importance of appropriate verbal containment for all states. This would be followed by environmental measures, medication and mechanical restrain depending on the severity of the state. Mechanical restrain is stressful for the patient, requires considerable healthcare resources and should be avoided whenever possible.