According to the latest figures from the UN - nearly 250 million people, that's one in every 20 people aged between 15 and 64, used illegal drugs in 2013. Of these, 27 million suffer from drug use disorders.
The current global war on drugs is largely guided by a political declaration adopted by the previous General Assembly session in 2009.
Despite a broad agreement, it is believed that deep divisions persist among the UN members, with some countries favoring a shift towards decriminalization.
A number of Latin American leaders say the war on drugs has failed and legalizing so-called soft drugs like marijuana is an irreversible trend, while a number of o