Comment by ijidak
Heroin is a name brand drug designed for pain by Bayer.
Later it became the illegal substance it is today.
I imagine patients seemed perfectly normal at the time it was released, otherwise it would never have been released for widespread medical use.
But, like fentanyl, a subset of the population exhibits the extreme behaviors that become stereotypical.
Diamorphine - heroins generic name - is still prescribed for pain in many countries, including the UK.