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Cocaine

2013-11-13 来源: 类别: 更多范文

Cocaine The potent drug cocaine was first prescribed as an anesthetic and a painkiller by doctors who believed that it was a safe substitute for morphine. The drug is a white, crystalline compound that has been processed from the leaves of the coca plant (Erythroxylum coca), a tropical shrub commonly found wild in Peru and Bolivia and cultivated in many other countries. For centuries South American Indians have chewed the coca leaves for pleasure and to help them withstand strenuous working conditions, hunger, and thirst. The cocaine in the leaves produces local anesthesia of the mouth and stomach. Cocaine is a dangerous, habit-forming drug. It is classified as an alkaloid compound. (Other well-known alkaloids are morphine, strychnine, and nicotine.) Cocaine stimulates the cortex of the brain, producing intense euphoria and the desire to repeat the experience; however, the drug has a highly toxic effect upon the central nervous cocaine, drug, leaves, coca, white, produces, nasal, morphine, compound, amounts, working, withstand, wild, well-known, weight, vessels, veins, users, upon, ulcerations, tropical, treated, toxic, toot--can, time, through, thirst, tasted, taken, system, substitute, strychnine, strenuous, stomach, stimulates
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