I heard of T's and Blues on Erowid, something americans did, they had a powerful (more so than benadryl and doxylamine) antihistamine called ahem, trippellenamine. Shooting Talwin with it was apparently heavenly. And yeah, the few times I've shot a Talwin, there was this kind of dissociative effect to it, very slight, but it was pretty damn euphoric, I only had about 15 of them but I also had my first bag of SteriFilts arrive from France for such a low price, it took a couple years to use them all 2010-2012, heavy chippery to dilaudid-crack-like addiction, ugh.
As for naloxone with other opiates, i've had a Targin 80mg, it's OxyNeo with Naloxone,the promotional sheet in the medication book said all the pain killing of oxycontin without the constipation. My friend in germany says this opioid they got called Tilidine is very strong when shot, so all their pills contain Naloxone to prevent shooting it, he said the only country with pure tilidine was Slovenia and went there often. But ya, Targin showed up at the same time as the generics. A 80 was okay after skipping 2 days of bupe, but seriously, the fact there is 5mg and 10mg Targin brings tears to my eyes lol.
Yeah you can still get Talwin meant for IV/IM use in Canada though i have never actually heard of it being used. You had to order Sterifilts? I picked up a fuckload of those back in December from the needle exchange for free and i still have plenty left. As i mostly use generic MScontins these days one can't be too careful.
I have a friend who tried Targin and she said it was absolutely fucking useless. She ended up going into precipitated withdrawal as apparently even though she was taking it orally the Narcan absorbed enough to cause severe withdrawal symptoms.
As for Euro Opioids i really wish they had made Palfium and Diconal over on this side of the pond. Though one can only imagine how much they would be abused.