The illegal drug trade is a global black market dedicated to the cultivation, manufacture, distribution and sale of drugs that are subject to drug prohibition laws.
Drug prohibition law is prohibition-based law by which governments prohibit, except under licence, the production, supply, and possession of many, but not all, substances which are recognized as drugs, and which corresponds to international treaty commitments in the Single Convention on Narcotic Drugs 1961, the Convention on Psychotropic Substances 1971, and the United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances 1988.
A drug is any substance other than food, that when inhaled, injected, smoked, consumed, absorbed via a patch on the skin or dissolved under the tongue causes a physiological change in the body.
Illegal Drug Trade Thrives in Mexico and Afghanistan by VOA News
Most jurisdictions prohibit trade, except under license, of many types of drugs through the use of drug prohibition laws.
The verb license or grant license means to give permission.
'Cartel Land' Explores Deadly Consequences of Illegal Drug ... by ABC News
A UN report has stated that "the global drug trade generated an estimated US$321.6 billion in 2003."
With a world GDP of US$36 trillion in the same year, the illegal drug trade may be estimated as nearly 1% of total global trade.