Researchers led by Professor David Nutt, a former chief drugs adviser to the British government, asked drug-harm experts to rank 20 drugs (legal and illegal) on 16 measures of harm to the user and to wider society, such as damage to health, drug dependency, economic costs and crime.
Alcohol is the most harmful drug in Britain, scoring 72 out of a possible 100, far more damaging than heroin (55) or crack cocaine (54). It is the most harmful to others by a wide margin, and is ranked fourth behind heroin, crack, and methamphetamine (crystal meth) for harm to the individual.
