Cocaine "Recreational" users who take the drug under controlled conditions often cannot distinguish it from other drugs or even from a placebo. Yet huge probes have made cocaine a major international commodity by Craig Van Dyke and Robert Byck A few hundredths of a gram of cocaine hydrochloride, chopped finely and arranged on a smooth surface into several lines, or rows of powder, can be snorted into the nose through a rolled piece of paper in a few seconds. The inhalation shortly gives rise to feelings of elation and a sense of clarity or power of thought, feelings that pass away for most people in about half an hour. Although the growing interest in cocaine in the U.S. and Western Europe is in part a consequence of this simple, hedonistic experience, the real importance of the drug derives from the interaction of social, economic and political factors: the current status of cocaine as a fashionable drug for "recreational" use, its artificially inflated price, the control of its distribution by criminal organizations, the stresses its barter and untaxed trade impose on the monetary and taxation systems, the strains it places on the resources of law enforcement, the threats to civil liberties posed by drug laws that are not based on a rational understanding of the drug's effects and the potential of the cocaine trade for corrupting officials and undermining respect for the law. Estimates of the cost and consumption of cocaine are subject to the biases of the reporting source and should therefore be viewed with skepticism. According to a 1979 report by the White House Strategy Council on Drug Abuse, some 10 million Americans had taken cocaine within the preceding 12 months, compared with 10,000 people 20 years before. The National Narcotics Intelligence Consumers Committee (NNICC) has estimated that in 1979 between 25,000 and 31,000 kilograms of cocaine entered the U.S. illegally. During 1980 U.S. cocaine imports are estimated to have been between 40,000 and 48,000 kilograms. These quantities are based on estimates of the refining capacity of clandestine laboratories, on estimates of the proportions of the refined product that are sold in the domestic and foreign markets and particularly on estimates of the production yields of raw coca leaves in the source countries. Perhaps not surprisingly, the estimates of crop yield made in the source countries are in many cases smaller than U.S. estimates by a factor of two or more. The illicit retail dealer can sell a white, crystalline substance consisting of from 10 to 85 percent cocaine and various other substances for between $100 and $140 per gram. The NNICC, from its estimate of 1980 cocaine imports, puts the retail value of the industry at between $27 and $32 billion. If the cocaine trade were included by Fortune in its list of the 500 largest industrial corporations, cocaine would rank seventh in volume of domestic sales, between the Ford Motor Company and the Gulf Oil Corporation. Based on U.S. estimates, the monetary value of Bolivia's cocaine exports may now surpass the value of the country's largest legal industry, tin. Colombia's more highly refined cocaine exports total about $1 billion annually, half the value of the coffee crop. It is all too easy to suppose the physiological and social consequences of the use of cocaine are commensurate with its popularity and economic importance. Actually the assessment of the medical and psychological implications of short- and long- term cocaine usage has only recently begun. In 1975 the National Institute on Drug Abuse began a research project intended to define the pharmacology of cocaine in man. A number of investigators have since been engaged in various aspects of cocaine-related research, including a detailed description of the effects of the drug in man, its distribution and metabolism in the body, its reinforcing properties and its potential for abuse. After six years of work on the problem our group at the Yale University School of Medicine has been able to describe with reasonable confidence the time course of the basic pharmacological effects that follow the introduction of cocaine into the body by various routes. We have also been able to associate the time course of cocaine concentration in the blood with replicatable measures of its psychological effects. Although cocaine is intensely pleasurable to some people, we have found that its ability to produce a unique "high" may be overrated: our subjects, all experienced cocaine users, could not distinguish a single dose of cocaine taken in-tranasally from the same quantity of the synthetic local anesthetic lidocaine. Investigators at the University of Chicago School of Medicine found that their subjects could not distinguish the immediate effects of intravenous cocaine from those of amphetamine, although at later times the differences between the drugs are apparent. Such results are the first steps toward distinguishing the almost overwhelming mythology that surrounds cocaine from reliable information about its effects. At the same time there has been renewed interest in understanding the history of cocaine consumption as well as its significance to the Indian cultures of the Andes, including parts of present-day Colombia, Ecuador, Peru, Bolivia and Chile. Of course, the Andean social and pharmacological experience with the coca leaf cannot be compared directly with the current social experience with the more potent substance cocaine hydrochloride, but one can still hope to gain a cultural perspective on the drug. Such a perspective is at least as important to informed public policy as knowledge of the biochemical and pharmacological action of cocaine is. Cocaine is an alkaloid, a member of a broad group of plant substances that also includes nicotine, caffeine and morphine. In nature cocaine is found in significant quantities only in the leaves of two species of the coca shrub. Erythroxylum coca requires a moist, tropical climate. According to Timothy Plowman of the Field Museum of Natural History in Chicago, E. coca may be native to the Peruvian Andes, although it now grows throughout the eastern highlands of the Andes in Ecuador, Peru and Bolivia. The concentration of alkaloidal cocaine in its leaves can be as high as 1.8 percent. E. coca was cultivated by the Incas, and it remains the primary source of cocaine for the illicit world trade. E. novogranatense, the other cocaine-rich species of Erythroxylum, is cultivated in drier, mountainous regions of Colombia and along the Caribbean coast of South America. The truxillense, or "Trujillo," variety of the latter species is now grown on the northern coast of Peru and in the dry valley of the Marañón River, a tributary of the Amazon in northeastern Peru. Its leaves are harvested for legal export to the Stepan Chemical Company in Maywood, N.J., where the cocaine is extracted for controlled pharmaceutical purposes and the remaining leaf material is prepared as a flavoring for Coca-Cola. Recent archaeological findings in Ecuador indicate that human experience with cocaine dates back at least 5,000 years, long before the Inca empire was established. To the Incas coca was a plant of divine origin and a symbol of high social or political rank. According to one myth, the god Inti created coca to alleviate the hunger and thirst of the Incas, who believed themselves to be descendants of the gods. The Inca state controlled virtually every aspect of daily life, including the cultivation and use of coca. Coca was chewed primarily by the ruling classes, although on occasion it was disbursed to soldiers, workers or runners. Casual chewing of the leaves was considered a sacrilege. The first reports of coca chewing to reach Europe were almost coincident with the discovery of the New World. The letters of Amerigo Vespucci, published in 1507, mention the Indian practice of chewing leaves and adding ashes to the cud. A major component of the ash is carbonate of lime, or calcium carbonate (CaCO3), which intensifies the subjective effects of the coca leaves; among the Andean Indians the practice of adding lime continues today. Other European observers were first mystified, then repulsed and finally impressed by the Indian's use of coca. A manuscript completed in 1613 by Don Felipe Guaman Poma de Ayala represents coca chewing as an unauthorized social activity engaged in by the Indians when they were expected to be working. 0ther accounts of coca chewing from explorers and chroniclers were more enthusiastic. Coca was reported to cause a striking increase in endurance, enabling men to do hard work with little food at high altitudes. By 1569 the Spanish entrepreneurs in South America had recognized the utility of coca in recruiting Indians for labor, and ..... O texto se completa com cerca de 2,5 vezes este tanto! (cada vez mais científico) se quiser, peça por e-mail.