He detailed the use of EPO, hormones, amphetamines, corticoids, steroids, testosterone and cocktails including heroin and cocaine.

BBC: Battle against drug peddlers continues

Last week, Mexico enacted a law decriminalising possession of small amounts of drugs, including cocaine and heroin - the country is in the midst of a drugs turf war which has claimed more than 11, 000 lives in the last three years.

BBC: Argentina rules on marijuana use

Although some illegal drugs are extremely dangerous to some people, most are not especially harmful. (Tobacco is more addictive than virtually all of them.) Most consumers of illegal drugs, including cocaine and even heroin, take them only occasionally.

ECONOMIST: Failed states and failed policies