I'm not sure if the heat would destroy the morphine or not, but theoretically I guess you could crush it and smoke it off of tin foil with a straw like heroin... I know people that use to smoke the old OC, I use to tell them they were not smart for doing it...
For harm reductions sake, don't smoke pills.
It can be done probably but I'm not going to condone it.
Morphine Sulfate sadly is best plugged.
Morphine HCl would be the most ideal thats why Morphine (MS, MS contin, etc, sulphate salts only is what I am talking about) is harder to use recreationally as well
The only next best thing you could do is maybe try snorting it... eating it outright may be the second best option.... MS sucks though its hard to get high on unless you got a lot of it... you won't get much of a rush (albeit you will if you plug it... I did the one time I tried it, not so much a rush but a fast comfy-no stomach issues- onset...)