I liked snorting Opana ER as a so-called 'baseline' drug to lessen amount of oxys/hydros/morphine IR, etc I had to take to get a buzz. Once that gel would stick up there, it was good for me for quite some. Always kept my Op doses in the5-15 mg range when mixing, to avoid dropping dead. Opana ER can be a creeper. I also always thought it smelled like peanut butter. Added bonus, I guess. However, I have ABSOLUTELY, POSITIVELY NEVER HAD ANYTHING GIVE ME A WORSE WITHDRAWL THAN THIS DRUG! I have abused many things in the past, but Op ER was the ONLY, and I mean ONLY substance that made me very seriously contemplate suicide, after 12 days of 24 hours a day insomnia, horrible depression, body aches, fatigue, and finally, embaressingly, extreme rage and a psychotic break in which I smacked my wife and spent 45 days in county jail. That is not anywhere near my norm. This is a nasty drug; one I don't have any plans to mess with this crap again. That was 5 years ago, and my opinion is still the same now as it was then. Oh, and lastly, believe it or nor, another really crappy W/D is good ol', 'harmless' tramadol. Try coming off a 25-40 pill / day habit, but that's a story for another day, a different thread. Comments/Opinions y'all?