hmmm. what exactly is nitrazapine? what class of drug? never heard of it.. but I know and have done just about every common opioid/benzo there is in the US at least... and I have to say, morphine is usually pretty shitty when done any way BUT IV. And the MScontin Morphine ER tabs(which it seems you had) are hard as fuck to prep for IV, furthermore I dont know if you even IV anything... but don't start now! All I am saying, is I have tried both morphine ERs and IRs every ROA there is, even tried smoking one on foil, one time, like with H or oxy.. it was an MScontin 100mg tab, with the coating wiped off much like you would with OCs.. it was a total waste and was nothing like smoking oxy, which I used to love, especially the OC80s, and at the time I was very addicted to smoking OC, so since they looked very similar to one another and were both opioids, I figured "hey this might work!", but nope total fucking waste of a pill, and I am embaressed to say I even tried that lol.. So I had quite a few of those 100s and tried taking them orally both swallowed whole and chewing them, and felt like hardly anything happened, just the slightest opiate buzz that was so subtle I barely knew I even took anything.. then I tried sniffing one.. it was no better than oral, if not worse than oral.. Didn't try plugging, but it might have been better than oral/intranasal, at least I would think it would, just hadn't plugged anything before, at that time. Didn't bother trying to IV them at that time either, I wasn't too into slamming shit when I had those, mainly just sniffed/smoked OCs on foil, for the most part with the occasional opana or something else. but even if I were to try and IV it, I probably would have ended up with a gelled up mess of a solution, forcing me to just take it orally or plug it... I have watched a few of my friends try to prep them for IV and get nothing but a big gelled up glob of a solution, which I would imagine if there was a way to get it liquefied enough for IV(which I have heard there is), it would still be absolutely terrible for your veins... I have only IVed morphine IR tabs, which were way better and prepped just like any other IR opioid, like oxycodone would for instance..and that was very nice! that was the only time I actually felt something from morphine IME with it, and it was amazing.. but if your not a shooter, I would try and stick with good old oxycodone, up the nose or taken orally! Used to love sniffing an OC 80 and then smoking one off foil for the rush from smoking and quick powerful high, and also the amazing feeling/legs from sniffing them, combined.. it was actually usually way more than that more like 2-3 up the nose, 2 on the foil, most of the time, depending on my money situation, sometimes more, sometimes less.. always had to sniff some, if I had just one, it would be up my nose.. now I am on subs. dont do oxy anymore.. still miss the old school OC80s, which aren't around in the US anymore, just bullshit, plastic POS OPs.