A portable drug administration device includes a pump and a controller configured to control operation of the pump according to a standard administration mode and a suspend mode in which drug administration is temporarily suspended. The device is configured to generate an event trigger on the occurrence of at least one of an error condition and/or the beginning of a maintenance action by the user. The controller is configured to detect the occurrence of the event trigger, and to store, in response to the event trigger, administration data, the administration data comprising all information that characterizes the current administration according at the time of occurrence of the event trigger automatically in a memory and to switch the device from the standard administration mode to the suspend mode. The controller is further configured to detect the occurrence of a restoring trigger and to retrieve, in response to the restoring trigger, the administration data from the memory, to switch the device from the suspend mode to the standard administration mode and to control the pump to resume administration according to the retrieved administration data.