Heroin should be legalized for treatment of cancer pain. It is difficult to rationalize the legalization of heroin, since it breaks down in the body to the legal drug morphine. Increasing the dose of morphine will give the same analgesic effects as heroin. Crack is more addicting than cocaine powder. But there is no pharmacological reason why the form of a drug or the route of administration should change the addiction liability of a drug.
Cocaine produces tremendous euphoria, whereas nicotine produces mild euphoria.
People who experience dependence have a brain disease. Addiction is a will-power problem. This is an old belief, probably based upon wanting to blame addicts for using drugs to excess. Addicts should be punished, not treated, for using drugs. Research is less important than treatment.