First synthesized from morphine in 1874, heroin was not extensively used in medicine until the beginning of this century. Commercial production of the new pain remedy was first started in 1898. While it received widespread acceptance from the medical profession, physicians remained unaware of its potential for addiction for years. The first comprehensive control of heroin in the United States was established with the Harrison Narcotic Act of 1914.

Heroin, an illegal opiate drug known on the street as smack, junk, brown sugar, dope, horse, skunk and other names is derived from the resin of the poppy plant which grows predominantly in southeast and southwest Asia, Mexico and now in Colombia. It is manufactured in remote laboratories using rudimentary equipment which presses the powder into bricks for bulk shipment to destination countries like the United States. Smaller amounts are smuggled by couriers who swallow heroin-filled latex balloons before boarding commercial airlines.

Pure heroin is a white powder with a bitter taste. Most illicit heroin is a powder form which may vary in color from white to dark brown because of impurities left from the manufacturing process or the presence of additives. Pure heroin is rarely sold on the street. A "bag" --slang for a single dosage unit of heroin--may contain 100 mg of powder, only a small portion of which is heroin. The remainder could be sugars, starch, powdered milk, or quinine. Traditionally the purity of heroin in a "bag" has ranged from one to ten percent. More recently, heroin purity has ranged from one to ninety-eight percent, with a national average of thirty-five percent.