Opioider anføres fortsat som det vigtigste stof af størstedelen (53%) af dem, der kommer ispecialiseret narkotikabehandling i2008 i Europa, og heroin bliver anført af 48% af alle klienter(102
Opioids continued to be cited as the primary drug by the majority (53¢%) of those entering specialised drug treatment in 2008 in Europe, with heroin being cited by 48¢% of all clients¢(102