people are missing the obvious answer here.
The rush that you experience when you IV dope is the feeling of the drug crashing thru the BBB all at once and flooding your receptors. when you IV for a while you learn to associate the rush with the high , and if you dont get the rush, the high is barely noticeable.
Becuz you are on suboxone, the 'receptor flood' aint happening when you boot the dope since there is still residual amounts of bupe blocking them. When you sniff its a more gradual feeling and you dont expect the rush. you are able to recognize the gradual high since you expect the gradual high.
when you IV on bupe, its very common for it to reduce, tone down, kind of "mute" the rush, ive experienced it too. thats just how it is when you use on sub, unless you use more than your usual dose and double up or get some real fire dope. (BTW, some people are able to get really high and break thru the bupe easily, 8-12 hours after takin small doses of sub, and others have to wait 36 hours to even feel a little bit, so its different for each person.) but it sounds like for you, yuo are one of the people who needs to be off the sub for a really good chunk of time before you can even start to feel dope in a normal way again.
In your situation, you are still feeling the effect when you boot the dope, but just more subdued and less noticeable. its just that you are missing the rush and becuz you aint gettin it , you are thinking that you aint high when you really are. the sniffing the bags is just boosting up the high thats already there when you add it on, and becuz you shot X number of bags and then sniffed another one, it kinda pushed you over the edge and you realized just how high you really were. It wasnt that that single bag got you rocked, its that it was just enough for you to finally recognize that you WERE high--the shots of dope that you did before you sniffed the bag, was really the force behind that, the sniffed bag was just the thing that tipped you over the edge to high ville.
The IV dope just aint noticeable to you when you IV becuz the leftover sub is blockin your receptors and preventing the feeling of the dope overpowering you as it crashes into your brain that you are used to and you associate the rush with a high-without it you feel ripped off like you aint high. And when you tried shootin again after you alredy booted and sniffed a few bags, of course it didnt do shit--your receptors by this time, at least the ones not covered by bupe, was already totally flooded with the dope. so by that point there was no room for anything else to latch on there, and that will also prevent you from really feeling much of an effect-you just hit the ceiling. if you wait a few hours for them to clear off again, it will have more of a effect, but when you just boot or sniff a bunch of bags one after the other, you do get a cumulative high, but you dont NOTICE the high as it comes becuz the feeling of "coming up" or the rush, is the feeling of the receptors bein hit with the drug, without that feeling the high is much less obvious and more subtle.
I also agree that this thread is mad self serving and coulda been answered pretty damn easily if the Op showed a lil bit of effort and read thru the many threads we already got here.
engElle--The pins and needles 'itchy" feeling you are experiencing is caused by unacetylated morphine in the dope you are gettin. Ive had the same thing happen to me, i was doin 7, 8, 9, 10 bag shots in my days of bein on dope too. when you do that many bags at once with the unacetylated morph. in them, that itchy, burning pins and needles sensation is so strong that it overtakes your entire body and basically overpowers the rush, you end up not feelin the rush at all. by the time the pinz n needles feeling leaves, the rush is already past and you left with the 'high', the thing is the bags are prolly just shitty bags and aint got much legs to them.lots of bags you get a decent, ok, or even good rush but afterwards the high aint much of nothing, so you prolly caught some bags that were like that, didnt feel the rush cuz the u.a. morphine, and then are left feeling ripped off since the dope aint good enough to have staying power and give you a decent high other than the rush.