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Marijuana is a mixture of leaves and the flowering tops of the Indian hemp plant Cannabis Sativa, smoked or eaten for its hallucinogenic and pleasure-giving effects. The psychoactive ingredient of marijuana, tetrahydrocannabinol (THC), is concentrated in the flowering tops of the hemp plant; hashish, a drug prepared from the plant resin, has about eight times more THC than marijuana. Hemp grows throughout temperate regions, with the more potent varieties produced in dry, hot, upland climates. Expect for limited medical purposes, cultivating hemp for marijuana is illegal in all Marijuana has a lot of slang names including pot, grass, weed, hash, and about 200 other names. Marijuana is by far the world's most commonly used illicit drug and far more dangerous than most users realize. So, there is just cause for alarm when adolescent marijuana use increases, as it did in the mid-1990's, and the age at which youngsters first experiment with pot starts Many users describe two phases of marijuana intoxication: initial stimulation, giddiness, and euphoria, followed by sedation and tranquillity. Mood changes are often accompanied by altered perceptions of time and
As for hashish, a resin made from flowers of the female plant, THC levels may be five to ten times higher than crude Marijuana's. Marijuana and hashish are not thought to produce psychological dependence except when taken in large daily doses. The thinking processes become disrupted by fragmentary ideas and memories. There is just as much exposure to cancer-causing chemicals from smoking one marijuana joint as smoking five tobacco cigarettes. Chronic marijuana smokers are prey to chest colds, bronchitis, emphysema, and bronchial asthma. Regardless of the THC content, the amount of tar inhaled by marijuana smokers and the level of carbon monoxide absorbed are three to five times greater than among tobacco smokers. Effects of smoking are generally felt within a few minutes and peak in 10 to 30 minutes. It will show up in urine tests three days after use, the traces may be picked up by sensitive blood tests two to four weeks later. A consensus exists among physicians and others working with children and adolescents that use is undesirable and may interfere with psychological and possibly physical maturation. Its usefulness for glaucoma patients more doubtful. When pregnant women use marijuana, they run the risk of having smaller babies with lower birth weights, who are more likely than other babies to develop health problems. Like alcohol intoxication, marijuana intoxication impairs reading, comprehension, memory, speech, problem solving ability, and reaction time. Although the chronic effects are not yet certain, marijuana is probably injurious to the lungs in much the same way that tobacco is. And even those that do are open to a range of interpretations--not necessarily worrying to marijuana users.
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