
Nicotine influences as both a depressant and stimulant on your body. It elevates your saliva, bowel activity and bronchial secretions. It acts the nervous system and may cause tremors in the unpracticed user or even fits with high doses. A stimulation phase depresses the muscles in your airways. The euphoric agent contained in nicotine causes relaxation from stressful situations.
In the mean, tobacco increases your heart level 10 to 20 beats per minute, and it elevates your blood pressure by 5 to 10 mmHg (because nicotine constricts the blood vessels). Nicotine may cause nausea, diarrhea and sweating. It increases the blood rate of blood sugar and insulin production. Nicotine enhances platelet aggregation, which may also form blood clots. Nicotine also suppresses an appetite. Therefore fear of weight gain also affects the willingness of some people to quit smoking.
The serious health risks may motivate you to give up. If you smoke for a long time, you may get the following risks: coronary artery disease, including angina and heart attacks; blood clots, which may lead to aneurysms and strokes; decreased ability to taste and smell; delayed wound healing; lung problems such as chronic bronchitis and emphysema; high blood pressure; cancer (especially in the larynx, lung, mouth, bladder, esophagus, pancreas, kidney and cervix); gum and tooth diseases; pregnancy-related problems, including miscarriage, premature labor, low birth weight, and risk for sudden infant death syndrome.
Smokeless tobacco (chewing tobacco, snuff, etc.) for a long time also causes the same risks. People, who use smokeless tobacco, have a 50 times greater hazard for mouth cancer than those who do not use such products.