You are feeling the morphine, it is just subtle in the euphoria as morphine is notorious for when taken orally, especially. It is there, but it just doesn't seem to be there. Hard to explain, but true. 90 mg morphine via all of those ROA's is a ton of morphine for an opiate-naive individual, and I'd think it a very dangerous dose. Definitely DO NOT repeat this, and DO NOT take the extra pill. You used extended-release morphine, so you don't know how much has yet to be released, too. That is the other trouble, because you did not take them orally, which I would have recommended, even though morphine does have a lower BA orally, it can be very good that way. If you can take two Percocet 10's and get a nod, 90 mg morphine should have you puking, stuporous, incredibly noddy, and possibly passed-out to a degree of incapacitation, if not a dangerous OD! 90 mg morphine is just NOT a dose one takes, safely, when one can take 20 mg oxycodone and get a nod off of that. The super itchy feeling is letting you know it is working, as is the bored and mellow feeling. You are probably far more under the influence than you'd think. Now, you might be lucky in that it was extended-release and that it did not all kick in at once, and that, maybe, you have a natural tolerance to morphine (some do) over other opiates. I do not know the particulars, but 90 mg is way too much! I cannot stress this enough. If you begin too sedated, notice problems with breathing, or anything, contact emergency medical services immediately, for the morphine to be released could add on to the currently active morphine's effect, even if there is no euphoria perceived.