>>23528168they have been this strong since the 50s they just havent been produced in clandestine labs untill recently.
the shit with pushing the envelope of Piperidine and Benzidamol opioids died out in the early 60s because after they made fent/fentalogues and Nitazenes there was no real reason to keep going, these chemicals are already impractically strong and insanely dangerous.
most of these chemicals were made by Paul Jannsen if u wanna learn more. pls don't take them though, they are very dangerous and are totally shite compared to morphine, the only worthwhile synthetic opioid is Dipipanone, potency =/= better.
all the best and most euphoric opioids are pretty weak.