... heated to remove the hydrochloride, thus producing a form of cocaine that can be smoked. The term "crack" refers to the crackling sound heard when the mixture is heated, presumably from the sodium bicarbonate. On the illicit market, crack, or "rock," is sold in small, inexpensive dosage units. Smoking this form of the drug delivers large quantities of cocaine to the lungs, producing ... and emergency room episodes in major U.S. cities, indicated a steady increase in the number of heroin-related deaths from 1992 through 1998. In this study, the number of incidents where heroin/morphine (...

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