Can you be more specific about what opioids you took?
I took morphine sulfate usually, the 10 mg IR ones mixed with the 30mg ER ones that's I'd rinse off (the coating) and then crush up around 200+mg's worth and parachute them down my throat, usually followed with a large amount (7-8 shots)of 80 proof rum. Did this a solid dozen times and usually my eyes would just feel "cushiony" and my brain would feel adrift like on a cloud until I would lay in bed and sink into it and feel as though I'm floating on water while falling through the mattress before eventually passing out an hour or two later.
Always woke up afterwards.
I tried oxycodone as well a handful of times in doses ranging from 150-200mg's and had no luck either but the euphoria was better. I believe that if I possibly had placed a bag over my head back then or went out swimming my odds of CTB would have been vastly improved.
All I got as results for this was a decent amount of liver damage and I developed heart issues later in life as well but I'm not sure if my OD's caused this or not.