Beginning of Essay
are drugs that excite the nervous system. Most are made from the opium poppy, (Papaver Somniferum) which is found mainly in Asia. were the first drugs used as medicines. They can relieve physical and emotional pain, and for this reason, they made very good m ....

Middle of Essay
.... addicts, 90-95% use heroin. In the United Stated alone, there are between 500,000- 750,000 heroin addicts. Heroin is often mixed with cheaper substances, so that the dealer can make a larger profit. Since addicts don't know about the purity of a substance, many die because of overdoses. In an overdose of heroin, the lungs stop functioning, and the person dies from lack of air. There can be other effects of heroin addiction, one is that people who have illnesses may have them go untreated because the heroin has masked the pain. Another is that peoples veins collapse, from having been injected into to often. Their skin may also be covered with so ....