MacConnachie, A M Analgesics in the management of chronic pain. Part four: Step 3 oral analgesic drug therapy. [electronic resource] - Intensive & critical care nursing Dec 1998 - 318-9 p. digital Publication Type: Journal Article ISSN: 0964-3397 Standard No.: 10.1016/s0964-3397(98)80693-9 doi Subjects--Topical Terms: Administration, OralAnalgesics, Opioid--pharmacokineticsChronic DiseaseDextromoramide--pharmacokineticsDrug Administration ScheduleHumansHydromorphone--pharmacokineticsMorphine--pharmacokineticsPain--drug therapy