Word: tetrahydrocannabinol
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Dates: during 1970-1979
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Systematic scientific studies of marijuana's benefits or dangers began with the isolation and synthesis in 1965 of the plant's principal psychoactive ingredient-delta-9-tetrahydrocannabinol. But that is only one of more than 100 chemical substances in marijuana, some of which exert their own characteristic effects. Further hampering marijuana studies is the difficulty of screening out such other factors as environmental or genetic influences, and deciding what constitutes long-term use or heavy use. To date, most results have been based on studies of laboratory animals or small groups of healthy young men. Thus little...
...Oregon's pot farmers turned home-grown weed into a profitable racket by developing their unique sinsemillas hybrid. The robust, waste-free strain attracts buyers willing to pay $1,600 a pound, the yield from just one well-cultivated plant. Studies show that sinsemillas weed contains five times more tetrahydrocannabinol (pot's narcotic ingredient) than the common Mexican variety. Even federal drug experts are impressed. "A good deal of expertise goes into producing that kind of plant," notes Dr. Carlton Turner, director of marijuana research for the National Institute of Drug Abuse at the University of Mississippi...
...studies. Early research raised fears that even occasional puffing on a joint might lead to personality changes, birth defects, brain shrinkage, sterility in men, lowered resistance to disease and heart damage. Other studies have disputed these findings. Moreover, several studies have indicated that the major active ingredient in pot, tetrahydrocannabinol (THC), might even have medical uses. THC expands bronchial passages, which helps asthma patients breathe easier. It decreases pressure inside the eyes, which alleviates glaucoma. It also controls vomiting, relieves depression and, in some cases, eases pain...