So withholding Morphine to 'extend' your life a couple weeks, while being in complete misery, is as STOO-PID™ as worrying about the terminal patient getting 'hooked'.
My girlfriend was given morphine for 3 years while she fought and lost battle with cancer.
This is a foreign study from Kalmar University in Sweden.
The finding about morphine is buried in a report about the results of the study and apparently the finding was incidental to the major focus of the study.