Unhealthy Effects
About 442,000 people in the United States die each year from illnesses caused by cigarette smoking. Smoking accounts for nearly 90 percent of lung cancer deaths. Additionally, smokers are at increased risk for cancer of the larynx, oral cavity, esophagus, bladder, kidney, and pancreas.
One-third of smoking-related deaths are caused by coronary heart disease or chronic airway obstruction. Smoking also increases the risk of stroke by 50 percent—40 percent among men and 60 percent among women. Other research has shown that mothers who smoke give birth more frequently to premature or underweight babies, probably because of a decrease in blood flow to the placenta. Babies born to mothers who smoke during pregnancy are also at increased risk for sudden infant death syndrome.
Cigar and pipe smoke contains the same toxic and carcinogenic compounds found in cigarette smoke. A report by the National Cancer Institute concluded that the mortality rates from cancer of the mouth, throat, larynx, pharynx, and esophagus are approximately equal in users of cigarettes, cigars, and pipes. Rates of coronary heart disease, lung cancer, emphysema, and chronic bronchitis are elevated for cigar and pipe smokers and are correlated to the amount of smoking and the degree of inhalation.
Studies have found that cigarettes are addictive because an unknown component of tobacco smoke appears to destroy an important brain enzyme known as monoamine oxidase B (MAO B). The enzyme is vital for breaking down excess amounts of dopamine, a neurotransmitter that triggers pleasure-seeking behavior. Smokers have decreased levels of MAO B and abnormally high levels of dopamine, which may encourage the smoker to seek the pleasure of more tobacco smoke.
Even nonsmokers are at risk from smoking. Recent research has focused on the effects of environmental tobacco smoke (ETS)—that is, the effect of tobacco smoke on nonsmokers who must share the same environment with a smoker. The United States Environmental Protection Agency (EPA) estimates that exposure to ETS, which contains all the toxic agents inhaled by a smoker, causes 3,000 lung cancer deaths and an estimated 35,000 deaths from heart disease per year among nonsmokers. Secondhand smoke can aggravate asthma, pneumonia, and bronchitis, and impair blood circulation.
The smoking habit and addiction to nicotine usually begin at an early age. In the United States, more than 90 percent of adults who smoke started by age 21, and nearly half of them were regular smokers by the age of 18. Despite increasing warnings about the health hazards of smoking and widespread bans on smoking in public places, smoking remains common among teenagers and young adults. In 2001 surveys of students in grades 9 through 12 found that more than 38 percent of male students and nearly 30 percent of female students smoke. Although black teenagers have the lowest smoking rates of any racial group, cigarette smoking among black teens increased 80 percent in the late 1990s. Advertisements aimed at a young audience are largely blamed for this new generation of smokers.
Quitting Smoking
Studies of former smokers show that their risk of dying from smoking-related disease decreases with each year of abstinence. According to the World Health Organization (WHO), smokers who quit smoking before the age of 50 reduce their risk of life-threatening disease by half after just one year, compared with those who continue smoking.
Other benefits of quitting smoking include more disposable income, admission to social activities and institutions that ban smoking, and often, lower health insurance premiums. Nonetheless, to quit smoking is difficult, most likely because smokers crave the effect of the nicotine in the smoke. The U.S. surgeon general declared nicotine an addictive drug comparable to other addictive substances, including cocaine, heroin, and alcohol, in its ability to induce dependence. Overall, tobacco smoking causes about 20 times the number of deaths in the United States than all other addictive drugs combined.
Smoking cessation methods are plentiful, and many books and products are available to help an individual stop smoking. Many smokers turn to group help because of the support and understanding provided by other former smokers or people trying to quit. Most successful group-help techniques involve a challenge and reward system that also bolsters the self-discipline of the former smoker.
A number of nicotine replacement products are available to help a person quit smoking. Nicotine patches are small, nicotine-containing adhesive disks that must be applied to the skin. The nicotine is slowly absorbed through the skin and enters the bloodstream. Over time, a smoker uses nicotine patches containing smaller and smaller doses of nicotine until eventually the craving for nicotine ends. Nicotine gum works in a similar manner, providing small doses of nicotine when chewed. A nicotine nasal spray is a physician-prescribed spray that relieves cravings for a cigarette by delivering nicotine to the nasal membranes. Also available by prescription, the nicotine inhaler looks like a cigarette; when puffed, the inhaler releases nicotine into the mouth.
An approach combining three different smoking cessation therapies has found remarkable success. This approach combines an antidepressant drug called bupropin, marketed under the brand name Zyban, with a nicotine replacement product and counseling. While less than 25 percent of smokers who use nicotine replacement products alone remain smoke-free for more than a year, 40 to 60 percent of smokers using this combination approach achieved this milestone.
Microsoft ® Encarta ® Reference Library 2005. © 1993-2004 Microsoft Corporation. All rights reserved.
Re: Smoking.
Originally Posted by Kanamori
Ooooooh yeah. I learned that the hard way very early on.
. 1 in 40 people manage to kick heroin, and it's a lot easier to get addicted to heroin.
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