Well I enjoy codeine very much indeed. I'm lucky in that I get no significant histamine release symptoms, sometimes a slight itch but most often no itch at all - and that's without diphenhydramine or similar. And I get at least three hours of mild, relaxed euphoria. I don't need to be high for ten hours, I dose around three or four hours before I want to go to sleep and just chill and watch TV. It serves me very well for that purpose, thank you very much. Ten solid hours of being fucked on opiates doesn't really fit in with my lifestyle frankly, I've got shit to do. I'm not hugely interested in statistics either. I don't know why you've highjacked this thread on nitracaine to argue with me that your opioid is better than my opioid. I suggest you get back on topic mate.
My original point, lest we forget, is that that nitracaine, from what others have said, may well be better for long sessions than eph, but in terms of just doing one, or at most two, bumps in an evening eph wins for me because it's easier on the nose (although you're right, knock, it's not great in that regard, just much better than nitracaine, particularly in terms of the drip which I found utterly disgustiing) and gives me more euphoria from that initial rail, while doing its job in keeping me awake for a bit longer than I could otherwise manage.
adrandell116, your mileage obviously varies, in terms of your preference for both uppers and downers. What a wonderful world we live in that we all have different experiences and opinions. Enjoy it.