A controlling device (110) is configured for controlling a state of an alarm limit of an alarm device (108). The alarm device (108) is configured for generating an alarm signal in association with a monitored physiological parameter of a patient. The alarm limit triggers the generation of the alarm signal. In order to automatically control the state of the alarm limit, the controlling device (110) comprises a receiving unit (146) configured for receiving information indicating an administration of a treatment to the patient, a determining unit (148) configured for determining whether the treatment is administered to the patient based on the received information, and a controlling unit (150) configured for controlling the state of the alarm limit based on a result of the determination of the determining unit (148).