Abstract: A preserver for preserving drugs, comprising a door detector for detecting opening/closing the door of the preserver; a controller for determining whether the door was opened or not during a predetermined period of time based on the signal supplied by the door detector. When it is determined that the door was not opened at all in the period, the controller generates an alarm signal indicative of the determination to an administrator of the preserver. Upon receipt of the alarm signal, the administrator informs a medical facility of the situation, so that a further organized administration of the medical treatment may be provided.