关键词：滥用药物；预防；药物；学生；医药
摘 要：There are many illegal substances abused today. There are other substances, such as over-the-counter medications, household products, and legitimate pharmaceuticals (medicines) that are also abused. This brief guide provides information on the most commonly abused drugs. Here are some facts which will help you understand the facts about illegal drugs. The Controlled Substances Act (CSA) categorizes drugs into five categories (Schedules I-V) according to their medical use, potential for abuse, and safety. The most addictive drugs, and drugs which have no medical use, are in Schedule I. Federal penalties for manufacturing and/or distributing illegal drugs are based on the danger each drug poses to individuals and to the public. There are several classes of drugs; each class has different properties and effects on the user. Narcotics: Narcotics (such as heroin, morphine, OxyContin, etc.) are used to dull the senses and reduce pain. Narcotics can be made from opium (from the opium poppy) or created in a laboratory (synthetic and semi-synthetic narcotics). Stimulants: Stimulants reverse the effects of fatigue on the body and brain. Sometimes they are referred to as uppers. Cocaine, amphetamines, methamphetamine and Ritalin are stimulant drugs. Cocaine is derived from the coca plant grown in South America. Nicotine (found in tobacco) is also a stimulant.