- Drug is a substance used in the diagnosis, treatment, or prevention of a disease or as a component of a medication. It is also such a substance as recognized or defined by the U.S. Food, Drug, and Cosmetic Act. Drug is a chemical substance, such as a narcotic or hallucinogen that affects the central nervous system, causing changes in behaviour and often addiction.
- Kind of drug:-
Alcohol
Alcohol is the most common drug used and abused. It is an intoxicant that depresses the central nervous system and can lead to a temporary loss of control over physical and mental powers. The signs of drunkenness are well known can lack of coordination, slurred speech, blurred vision, and poor judgment. The amount of alcohol in liquor is measured by a "proof rating."
Alcohol is the most common drug used and abused. It is an intoxicant that depresses the central nervous system and can lead to a temporary loss of control over physical and mental powers. The signs of drunkenness are well known can lack of coordination, slurred speech, blurred vision, and poor judgment. The amount of alcohol in liquor is measured by a "proof rating."
Marijuana 
Marijuana is produced from the hemp plant (Cannabis sativa), which grows well throughout the world. Marijuana has been considered a "gateway drug" because of its potential to lead young people to experiment with stronger drugs such as heroin and cocaine. Marijuana is an intoxicant that is usually smoked in order to induce a feeling of euphoria lasting two to four hours. Physical effects include an increase in heart rate, bloodshot eyes, a dry mouth and throat, and increased appetite. Marijuana can impair or reduce short-term memory and comprehension. It can reduce one's ability to perform tasks requiring concentration (such as driving a car). Marijuana can also produce paranoia and psychosis. Because most marijuana users inhale unfiltered smoke and hold it in their lungs for as long as possible, it causes damage to the lungs and pulmonary system. Marijuana smoke also has more cancer-causing agents than tobacco smoke. Marijuana also interferes with the immune systeand reduces the sperm count in males.
Marijuana is produced from the hemp plant (Cannabis sativa), which grows well throughout the world. Marijuana has been considered a "gateway drug" because of its potential to lead young people to experiment with stronger drugs such as heroin and cocaine. Marijuana is an intoxicant that is usually smoked in order to induce a feeling of euphoria lasting two to four hours. Physical effects include an increase in heart rate, bloodshot eyes, a dry mouth and throat, and increased appetite. Marijuana can impair or reduce short-term memory and comprehension. It can reduce one's ability to perform tasks requiring concentration (such as driving a car). Marijuana can also produce paranoia and psychosis. Because most marijuana users inhale unfiltered smoke and hold it in their lungs for as long as possible, it causes damage to the lungs and pulmonary system. Marijuana smoke also has more cancer-causing agents than tobacco smoke. Marijuana also interferes with the immune systeand reduces the sperm count in males.
In recent years, snorting cocaine has given way to smoking it. Snorting cocaine limits the intensity of the effect because the blood vessels in the nose are constricted.Smoking cocaine delivers a much more intense high. Smoke goes directly to the lungs and then to the heart.On the
next heartbeat, it is on the way to the brain.
Cocaine is a stimulant and increases heart rate, restricts blood vessels, and stimulates mental awareness. Users say it is an ego- builder. Along with increased energy comes a feeling of personal supremacy: the illusion of being smarter, sexier, and more competent than anyone else. But while the cocaine confidence makes users feel indestructible, the crash from cocaine leaves them depressed, paranoid, and searching for more. Until recently, people speaking of cocaine dependence never called it an addiction. Cocaine's withdrawal symptoms are not physically wrenching like those of heroin and alcohol. Yet cocaine involves compulsion, loss of control, and continued use in spite of the consequences.
next heartbeat, it is on the way to the brain.
Cocaine is a stimulant and increases heart rate, restricts blood vessels, and stimulates mental awareness. Users say it is an ego- builder. Along with increased energy comes a feeling of personal supremacy: the illusion of being smarter, sexier, and more competent than anyone else. But while the cocaine confidence makes users feel indestructible, the crash from cocaine leaves them depressed, paranoid, and searching for more. Until recently, people speaking of cocaine dependence never called it an addiction. Cocaine's withdrawal symptoms are not physically wrenching like those of heroin and alcohol. Yet cocaine involves compulsion, loss of control, and continued use in spite of the consequences.
Hallucinogens
The drug of choice during the 1960s was LSD. People looking for the "ultimate trip" would take LSD or perhaps peyote and experience bizarre illusions and hallucinations. In the last few decades, these hallucinogens have been replaced by PCP (Phencyclidine), often known as "angel dust" or "killer weed." First synthesized in the 1950s as an anesthetic, PCP was discontinued because of its side effects but is now manufactured illegally and sold to thousands of teenagers.
PCP is often sprayed on cigarettes or marijuana and then smoked. Users report a sense of distance and estrangement. PCP creates body-image distortion, dizziness, and double vision. The drug distorts reality in such a way that it can resemble mental illness. Because the drug blocks pain receptors, violent PCP episodes may result in self-inflicted injuries. Chronic PCP users have persistent memory problems and speech difficulties. Mood disorders such as depression, anxiety, and violent behavior, are also reported. High doses of PCP can produce a coma that can last for days or weeks.
The latest scourge in the drug business has been so-called designer drugs. These synthetic drugs, manufactured in underground laboratories, mimic the effects of commonly abused drugs. Since they were not even anticipated when our current drug laws were written, they exist in a legal limbo, and their use is increasing. One drug is MDMA, also know as "Ecstasy." It has
been called the "LSD of the '80s" and gives the user a cocaine-like rush with a hallucinogen euphoria. Ecstasy was sold legally for a few years despite National Institute on Drug Abuse fears that it could cause brain damage. In 1985 the DEA outlawed MDMA, although it is still widely available. Other drugs have been marketed as a variation of the painkillers Demerol and Fentanyl. The synthetic variation of the anesthetic Fentanyl is considered more potent than heroin and is known on the street as "synthetic heroin"and "China White." Designer drugs may become a growth industry in the '90s. Creative drug makers in clandestine laboratories can produce these drugs for a fraction of the cost of smuggled drugs and with much less hassle from law enforcement agencies.
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