Tobacco is a plant grown for its leaves, which are dried and fermented before being put in tobacco products.
Tobacco contains nicotine, an ingredient that can lead to addiction, which is why so many people who use tobacco find it difficult to quit.
When a person tries to quit, he or she may have withdrawal symptoms, including: Both behavioral treatments and medications can help people quit smoking, but the combination of medication with counseling is more effective than either alone. Behavioral treatments use a variety of methods to help people quit smoking, ranging from self-help materials to counseling.
Children exposed to secondhand smoke are at an increased risk of ear infections, severe asthma, lung infections, and death from sudden infant death syndrome.
For many who use tobacco, long-term brain changes brought on by continued nicotine exposure result in addiction. Department of Health and Human Services has established a national toll-free quitline, 1-800-QUIT-NOW, to serve as an access point for anyone seeking information and help in quitting smoking.
Smoking while pregnant may also be associated with learning and behavioral problems in exposed children.
People who stand or sit near others who smoke are exposed to secondhand smoke, either coming from the burning end of the tobacco product or exhaled by the person who is smoking.
Nicotine is poisonous and, though uncommon, overdose is possible.
An overdose occurs when the person uses too much of a drug and has a toxic reaction that results in serious, harmful symptoms or death.Current FDA-approved NRT products include chewing gum, transdermal patch, nasal sprays, inhalers, and lozenges.NRTs deliver a controlled dose of nicotine to relieve withdrawal symptoms while the person tries to quit.Upon entering the blood, nicotine immediately stimulates the adrenal glands to release the hormone epinephrine (adrenaline).Epinephrine stimulates the central nervous system and increases blood pressure, breathing, and heart rate.As with drugs such as cocaine and heroin, nicotine increases levels of the chemical messenger , which affects parts of the brain that control reward and pleasure.