Malcolm Harris considers the drug trade as depicted on Breaking Bad:

Big Pharma brings in a $250 billion annually in the U.S. alone, much of it from the same chemical compounds in White’s lab. When it’s 89 percent pure, it’s illegal meth; when it’s 99 percent pure, methamphetamine is sold by Lundbeck Inc. under the trademark name Desoxyn, for "the short-term management of exogenous obesity." He isn’t making crank, Walter is manufacturing black-market pharmaceuticals.