A discrepency in the Morphine safe, suggests that the number present is less than the ammount recorded in the logbook and this in turn suggests a potential loss of a drug that can be life threatening. Should such a loss be discovered the required action is to seal the safe pending a police investigation, this is a legal requirement and was part of the agreement to allow such a dangerous drug to be issued to ambulance services. All of this action would not prevent a crew from going to another station to draw the drugs however that may not be practical.