In the 17th century, many people in Europe were treated for a variety of health problems with opium. In 1729, opium smoking was made illegal in China and soon the importation of opium was banned. This ban upset the British who were in charge of trading this valuable product. Opium was still smuggled into China and this caused the "Opium Wars" (1839-1842 and 1856-1860) between the British and the Chinese.
As of 2007, meth and meth lab seizure data suggests that approximately 80 percent of the methamphetamine used in the United States originates from larger methamphetamine laboratories operated by Mexican-based syndicates on both sides of the border, and that approximately 20 percent comes from small toxic labs in the United States.
Short-term effects of marijuana use include memory loss, distorted perception, trouble with thinking and problem solving, and anxiety. Students who use marijuana may find it hard to learn, thus jeopardizing their ability to achieve their full potential.
In 1914, the Harrison Narcotics Tax Act outlawed the sale and distribution of cocaine in the United States.
