Rockystuart ,sounds like your tolerance is about like mine .The morphine does not last for 12 hours for me either and really more like 6 to 8 hours tops .Probably more like six .Sometimes they might do me like that .I really can not compare them that well anyway because I never had any hydro to take the last several times I had the morphine .I usally just take 1 or 2 of the MS 30 mg at a time .
Sorry if we had a disagreement on the oxy .I was in a bad mood when I was posting the other nite .Three OC80,S at one time would definately kill me .Maybe not you ,but they would for sure kill me .

harley88