Linked from
The 13 pages that link to Heroin, each with the reason it gives.
OpiumCompared with: Unlike raw opium, heroin is a chemically modified, more potent opioid.
Harold ShipmanRelated: Shipman used fatal injections of diamorphine to kill patients.
Khun SaRelated: Khun Sa’s network trafficked heroin as well as opium.
Nicky BarnesNarrower topic: Heroin was the commodity at the center of Barnes’s trafficking business.