Earlier quoted context omitted.
Not heroin, but a completely unknown substance presented as heroin that probably consists of around 30% heroin.
Heroin addiction is one of the most harmful documented drug-addictions. The need for heroin, physically and psychologically, is the driving force behind the social and personal damage attributed to heroin. People do not get addicted to non-narcotic adulterants and become prostitutes. A cutting agent like caffeine or sugar is probably the safest ingredient...
Reading wikipedia and actually knowing stuff about drugs are very different things. Please stop posting, you don't have a clue.