The selling of counterfeit drugs can lead to a potential revenue of $450,000 based upon an original investment of $1,000, according to an official with Interpol.
In comparison, $1,000 invested into producing heroin will lead to $20,000 in revenue.
(How much money does prostitutes, drug dealers and other criminals make?)
Source: “Fake prescription drugs surpass heroin earnings,” San Francisco Choricle, July 11, 2010.