I did have one situation where the patient's comfort kit didn't have any Roxanol. When I asked where it went, I was told "I don't know"

by both patient and family. My supervisor said this had happened there before (I was new at that time), and that from now on, the strongest med we could keep in the house was Darvocet....Another time, a patient's husband was helping himself to her Percocet. Believe it or not, that supervisor's attitude was "well, it belongs to them - what can we do?)

I think trying to be "tactful" won't work. I would level with patient and family and tell them we won't be able to keep anything here if you continue to abuse it. Period. (Sorry if that sounds harsh - I have no patience with family taking meds from dying patients...)
mc3