Автор работы: Пользователь скрыл имя, 19 Апреля 2011 в 17:26, реферат
These days, drugs can be found everywhere, and it may seem like everyone's doing them. Lots of people are tempted by the excitement or escape that drugs seem to offer.
But learning the facts about drugs can help you see the risks of chasing this excitement or escape. Here's what you need to know.
Drugs
These days, drugs can be found everywhere, and it may seem like everyone's doing them. Lots of people are tempted by the excitement or escape that drugs seem to offer.
But learning the facts about drugs can help you see the risks of chasing this excitement or escape. Here's what you need to know.
The Deal on Substances
Thanks to medical and drug research, there are thousands of drugs that help people. Antibiotics and vaccines have revolutionized the treatment of infections. Medicines can lower blood pressure, treat diabetes, and reduce the body's rejection of new organs. Medicines can cure, slow, or prevent disease, helping us to lead healthier and happier lives. But there are also lots of illegal, harmful drugs that people take to help them feel good or have a good time.
I low do drugs work? Drugs are chemicals or substances that change the way our bodies work. When you put them into your body (often by swallowing, inhaling, or injecting them), drugs find their way into your bloodstream and are transported to pails of your body, such as your brain. In the brain, drugs may either intensify or dull your senses, alter your sense of alertness, and sometimes decrease physical pain.
Л drug may be helpful or harmful. The effects of drugs can vary depending upon the kind of drug taken, how much is taken, how often it is used, how quickly it gets to the brain, and what other drugs, food, or substances are taken at the same time. Effects can also vary based on the differences in body size, shape, and chemistry.
Although substances can feel good at first, they can ultimately do a lot of harm to the body and brain. Drinking alcohol, smoking tobacco, taking illegal drugs, and sniffing glue can all cause serious damage to the human body. Some drugs severely impair a person's ability to make healthy choices and decisions. Teens who drink, for example, are more likely to get involved m dangerous situations, such as driving under the influence or having unprotected sex.
Why People Take Drugs
And just as there are many kinds of drugs available, there are as many reasons for trying them or starting to use them regularly. People take drugs just for the pleasure they believe they can bring. Often it's because someone tried to convince them that drugs would make them feel good or that they'd have a better time if they took them.
Some teens believe drugs will help them think better, be more popular, stay more active, or become better athletes. Others are simply curious and figure one try won't hurt. Others want to fit in. A few use drugs to gain attention from their parents.
Many teens use drugs because they're depressed or think drugs will help them escape their problems. The truth is, drugs don't solve problems — they simply hide feelings and problems. When a drug wears off, the feelings and problems remain, or become worse. Drugs can ruin every aspect of a person's life.
Here are the facts on some
of the more common drugs.
Alcohol
The oldest and most widely used drug in the world, alcohol is a depressant that alters perceptions, emotions, and senses.
How It's Used: Alcohol is a liquid that is drunk.
Effects & Dangers:
Alcohol first acts as a stimulant, and then it makes people feel relaxed and a bit sleepy.
Addictiveness:
Teens who use alcohol can become psychologically
dependent upon it to feel good, deal with life, or handle .
In addition, their
bodies may demand more and more to achieve the same kind of high experienced in the beginning. Some teens are also at risk of becoming physically addicted to alcohol. Withdrawal from alcohol can be painful and even life threatening. Symptoms range from shaking, sweating, nausea, anxiety, and depression to hallucinations, fever, and convulsions.
Amphetamines
Amphetamines are stimulants that accelerate functions in the brain and body. They come in pills or tablets. Prescription diet pills also fall into this category of drugs.
Street Names: speed, uppers, dexies, bennies
How They're Used: Amphetamines are swallowed, inhaled, or injected.
Effects & Dangers:
• Swallowed
or snorted, these drugs hit users with a fast high, making
them feel powerful, alert, and energized.
Uppers pump up heart rate, breathing, and blood pressure, and they can also cause sweating, shaking, headaches, sleeplessness, and blurred vision. Prolonged use may cause hallucinations and intense paranoia.
Addictiveness: Amphetamines are psychologically addictive. Users who stop report that they experience various mood problems such as aggression, anxiety, and intense cravings for the drugs.
Cocaine and Crack
Cocaine is a white crystalline powder made from the dried leaves of the coca plant. Crack, named for its crackle when heated, is made from cocaine. It looks like white or tan pellets.
Street Names for Cocaine: coke, snow, blow, nose candy, white, big С
Street Names for Crack: freebase, rock
How They're Used: Cocaine is inhaled through the nose or injected. Crack is smoked.
Effects
& Dangers:
• Cocaine
is a stimulant that rocks the central nervous system, giving
users a quick, intense feeling of power and energy. Snorting highs last
between 15
and 30 minutes; smoking highs last between 5 and 10 minutes.
Cocaine also elevates heart rate, breathing rate, blood pressure, and body temperature.
Injecting cocaine can give you hepatitis or AIDS if you share needles with other users. Snorting can also put a hole inside the lining of your nose.
• First-time
users — even teens — of both cocaine and crack can stop
breathing or have fatal heart attacks. Using either of these drugs even
one time can
kill you.
Addictiveness: These drugs are highly addictive, and as a result, the drug, not the user, calls the shots. Even after one use, cocaine and crack can create both physical and psychological cravings that make it very, very difficult for users to stop.
Cough and Cold Medicines (DXM)
Several over-the-counter cough and cold medicines contain the ingredient dextromethorphan (also called DXM). If taken in large quantities, these over-the-counter medicines can cause hallucinations, loss of motor control, and "out-of-body" (or disassociative) sensations.
Street Names: triple C, candy, C-C-C, dex, DM, drex, red devils, robo, rojo, skittles, tussin, velvet, vitamin D
How They're Used: Cough and cold medicines, which come in tablets, capsules, gel caps, and lozenges as well as syrups, are swallowed. DXM is often extracted from cough and cold medicines, put into powder form, and snorted.
Effects & Dangers:
Addictiveness: People who use cough and cold medicines and DXM regularly to get high can become psychologically dependent upon them (meaning they like the feeling so much they can't stop, even though they aren't physically addicted).
Depressants
Depressants, such as tranquilizers and barbiturates, calm nerves and relax muscles. Many are legally available by prescription (such as Valium and Xanax) and are bright-colored capsules or tablets.
Street Names: downers, goof balls, barbs, ludes
How They're Used: Depressants are swallowed.
Effects
& Dangers:
When used as prescribed by a doctor and taken at the correct dosage, depressants can help people feel calm and reduce angry feelings.
Depressants and alcohol should never be mixed — this combination greatly increases the risk of overdose and death.
Addictivencss: Depressants can cause both psychological and physical dependence.
Ecstasy (MDMA)
This is a designer drug created by underground chemists. It comes in powder, tablet, or capsule form. Ecstasy is a popular club drug among teens because it is widely available at raves, dance clubs, and concerts. Street Names: XTC, X, Adam, E, Roll How It's Used: Ecstasy is swallowed or sometimes snorted. Effects & Dangers:
This drug combines a hallucinogenic with a stimulant effect, making all emotions, both negative and positive, much more intense.
Users feel a tingly skin sensation and an increased heart rate.
Many users also experience depression, paranoia, anxiety, and confusion. There is some concern that these effects on the brain and emotion can become permanent with chronic use of ecstasy.
• Ecstasy
also raises the temperature of the body. This increase can
sometimes cause organ damage or even death.
Addictivencss: Although the physical addictiveness of Ecstasy is unknown, teens who use it can become psychologically dependent upon it to feel good, deal with life, or handle stress.
GHB
GHB, which stands for gamma hydroxybutyrate, is often made in home basement labs, usually in the form of a liquid with no odor or color. It has gained popularity at dance clubs and raves and is a popular alternative to Ecstasy for some teens and young adults. The number of people brought to emergency departments because of GHB side effects is quickly rising in the United States. And according to the U.S. Drug Enforcement Agency (DEA), since 1995 GHB has killed more users than Ecstasy.
Street Names: Liquid Ecstasy, G, Georgia Home Boy
How It's Used: When in liquid or powder form (mixed in water), GHB is drunk; in tablet form it is swallowed.
Effects
& Dangers:
• GIIB
is a depressant drug that can cause both euphoric (high) and
hallucinogenic effects.
The drug has several dangerous side effects, including severe nausea, breathing problems, decreased heart rate, and seizures.
• GIIB
has been used for date rape because it is colorless and odorless
and easy to slip into drinks.
At high doses, users can lose consciousness within minutes. It's also easy to overdose: There is only a small difference between the dose used to get high and the amount that can cause an overdose.
Overdosing GHB requires emergency care in a hospital right away. Within an hour GI IB overdose can cause coma and stop someone's breathing, resulting in death.
GIIB (even at lower doses) mixed with alcohol is very dangerous — using it even once can kill you.
Addictiveness: When users come off GHB they may have withdrawal symptoms such as insomnia and anxiety. Teens may also become dependent upon it to feel good, deal with life, or handle stress.
Heroin
Heroin comes from the dried milk of the opium poppy, which is also used to create the class of painkillers called narcotics — medicines like codeine and morphine. Heroin can range from a white to dark brown powder to a sticky, tarlike substance.
Street Names: horse, smack, Big H, junk
How It's Used: Heroin is injected, smoked, or inhaled (if it is pure).
Effects & Dangers:
Addictiveness: Heroin is extremely addictive and easy to overdose on (which can cause death). Withdrawal is intense and symptoms include insomnia, vomiting, and muscle pain.
Inhalants
Inhalants
are substances that are sniffed or "huffed" to give the user
ah immediate rush or high. They include household products like glues,
paint thinners, dry cleaning fluids, gasoline, felt-tip marker fluid,
correction fluid, hair spray, aerosol deodorants, and spray paint.
How It's Used: Inhalants are breathed in directly from the original container (sniffing or snorting), from a plastic bag (bagging), or by holding an inhalant-soaked rag in the mouth (huffing).
Effects & Dangers:
Addictiveness: Inhalants can be very addictive. Teens who use inhalants can become psychologically dependent upon them to feel good, deal with life, or handle stress.
Ketamine
Ketamine hydrochloride is a quick-acting anesthetic that is legally used in both humans (as a sedative for minor surgery) and animals (as a tranquilizer). At high doses, it causes intoxication and hallucinations similar to LSD.
Street Names: K, Special K, vitamin K, bump, cat Valium
How It's Used: Ketamine usually comes in powder that users snort. Users often do it along with other drugs such as Ecstasy (called kitty flipping) or cocaine or sprinkle it on marijuana blunts.
Effects & Dangers:
• Users
may become delirious, hallucinate, and lose their sense of time
and reality. The trip — also called K-hole — that results from ketamine
use lasts
up to 2 hours.
Users may become nauseated or vomit, become delirious, and have problems with thinking or memory.
At higher doses, ketamine causes movement problems, body numbness, and slowed breathing.
• Overdosing on ketamine
can stop you from breathing — and kill you.
Addictiveness: Teens who use it can become psychologically dependent
upon it to feel good, deal with life, or handle stress.
LSD
LSD (which stands for lysergic acid diethylamide) is a lab-brewed hallucinogen and mood-changing chemical. LSD is odorless, colorless, and tasteless.
Street Names: acid, blotter, doses, microdots
How It's Used: LSD is licked or sucked off small squares of blotting paper. Capsules and liquid forms are swallowed. Paper squares containing acid may be decorated with cute cartoon characters or colorful designs.
Effects & Dangers:
• Hallucinations
occur within 30 to 90 minutes of dropping acid. People
say their senses are intensified and distorted — they see colors or
hear sounds with
other delusions such as melting walls and a loss of any sense of time.
But effects
are unpredictable, depending on how much LSD is taken and the user.
• Once you go on an acid trip, you can't get off until the drug is finished with you — at times up to about 12 hours or even longer!
• Bad
trips may cause panic attacks, confusion, depression, and
frightening delusions.
• Physical risks include sleeplessness, mangled speech, convulsions, increased heart rate, and coma.
• Users often have flashbacks in which they feel some of the effects of LSD at a later time without having used the drug again.