How does rectal administration of morphine increase bioavailibility when taking it orally is only 30% bioavailible? Rectal would be similar to insufflation, right? Wouldn't the morphine turn into gell in the enema bottle? I am using the 30mg MS contin xtd release....would I have to take the coatin off then crush it? or just crush the whole pill, mix with more water than necessary and bum boot it? THANKS!